Diff of the two buildlogs:

--
--- b1/build.log	2025-03-19 05:22:16.710358220 +0000
+++ b2/build.log	2025-03-19 05:31:10.878290323 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Mon Apr 20 23:42:19 -12 2026
-I: pbuilder-time-stamp: 1776771739
+I: Current time: Wed Mar 19 19:22:20 +14 2025
+I: pbuilder-time-stamp: 1742361740
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -24,52 +24,84 @@
 dpkg-source: info: applying concurrent-web-server-connection-refused.patch
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/1557681/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/3328002/tmp/hooks/D01_modify_environment starting
+debug: Running on ionos1-amd64.
+I: Changing host+domainname to test build reproducibility
+I: Adding a custom variable just for the fun of it...
+I: Changing /bin/sh to bash
+'/bin/sh' -> '/bin/bash'
+lrwxrwxrwx 1 root root 9 Mar 19 05:22 /bin/sh -> /bin/bash
+I: Setting pbuilder2's login shell to /bin/bash
+I: Setting pbuilder2's GECOS to second user,second room,second work-phone,second home-phone,second other
+I: user script /srv/workspace/pbuilder/3328002/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/3328002/tmp/hooks/D02_print_environment starting
 I: set
-  BUILDDIR='/build/reproducible-path'
-  BUILDUSERGECOS='first user,first room,first work-phone,first home-phone,first other'
-  BUILDUSERNAME='pbuilder1'
-  BUILD_ARCH='amd64'
-  DEBIAN_FRONTEND='noninteractive'
-  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=42 '
-  DISTRIBUTION='unstable'
-  HOME='/root'
-  HOST_ARCH='amd64'
+  BASH=/bin/sh
+  BASHOPTS=checkwinsize:cmdhist:complete_fullquote:extquote:force_fignore:globasciiranges:globskipdots:hostcomplete:interactive_comments:patsub_replacement:progcomp:promptvars:sourcepath
+  BASH_ALIASES=()
+  BASH_ARGC=()
+  BASH_ARGV=()
+  BASH_CMDS=()
+  BASH_LINENO=([0]="12" [1]="0")
+  BASH_LOADABLES_PATH=/usr/local/lib/bash:/usr/lib/bash:/opt/local/lib/bash:/usr/pkg/lib/bash:/opt/pkg/lib/bash:.
+  BASH_SOURCE=([0]="/tmp/hooks/D02_print_environment" [1]="/tmp/hooks/D02_print_environment")
+  BASH_VERSINFO=([0]="5" [1]="2" [2]="37" [3]="1" [4]="release" [5]="x86_64-pc-linux-gnu")
+  BASH_VERSION='5.2.37(1)-release'
+  BUILDDIR=/build/reproducible-path
+  BUILDUSERGECOS='second user,second room,second work-phone,second home-phone,second other'
+  BUILDUSERNAME=pbuilder2
+  BUILD_ARCH=amd64
+  DEBIAN_FRONTEND=noninteractive
+  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=20 '
+  DIRSTACK=()
+  DISTRIBUTION=unstable
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=x86_64
+  HOST_ARCH=amd64
   IFS=' 	
   '
-  INVOCATION_ID='490298547f5d4ae199fe6cffeaad2016'
-  LANG='C'
-  LANGUAGE='en_US:en'
-  LC_ALL='C'
-  MAIL='/var/mail/root'
-  OPTIND='1'
-  PATH='/usr/sbin:/usr/bin:/sbin:/bin:/usr/games'
-  PBCURRENTCOMMANDLINEOPERATION='build'
-  PBUILDER_OPERATION='build'
-  PBUILDER_PKGDATADIR='/usr/share/pbuilder'
-  PBUILDER_PKGLIBDIR='/usr/lib/pbuilder'
-  PBUILDER_SYSCONFDIR='/etc'
-  PPID='1557681'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=be28325644a14b16bdca5cbe56af1c16
+  LANG=C
+  LANGUAGE=et_EE:et
+  LC_ALL=C
+  MACHTYPE=x86_64-pc-linux-gnu
+  MAIL=/var/mail/root
+  OPTERR=1
+  OPTIND=1
+  OSTYPE=linux-gnu
+  PATH=/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/i/capture/the/path
+  PBCURRENTCOMMANDLINEOPERATION=build
+  PBUILDER_OPERATION=build
+  PBUILDER_PKGDATADIR=/usr/share/pbuilder
+  PBUILDER_PKGLIBDIR=/usr/lib/pbuilder
+  PBUILDER_SYSCONFDIR=/etc
+  PIPESTATUS=([0]="0")
+  POSIXLY_CORRECT=y
+  PPID=3328002
   PS4='+ '
-  PWD='/'
-  SHELL='/bin/bash'
-  SHLVL='2'
-  SUDO_COMMAND='/usr/bin/timeout -k 18.1h 18h /usr/bin/ionice -c 3 /usr/bin/nice /usr/sbin/pbuilder --build --configfile /srv/reproducible-results/rbuild-debian/r-b-build.mbaJvcxy/pbuilderrc_kEGM --distribution unstable --hookdir /etc/pbuilder/first-build-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/unstable-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.mbaJvcxy/b1 --logfile b1/build.log guile-fibers_1.3.1-5.dsc'
-  SUDO_GID='111'
-  SUDO_UID='106'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://213.165.73.152:3128'
+  PWD=/
+  SHELL=/bin/bash
+  SHELLOPTS=braceexpand:errexit:hashall:interactive-comments:posix
+  SHLVL=3
+  SUDO_COMMAND='/usr/bin/timeout -k 24.1h 24h /usr/bin/ionice -c 3 /usr/bin/nice -n 11 /usr/bin/unshare --uts -- /usr/sbin/pbuilder --build --configfile /srv/reproducible-results/rbuild-debian/r-b-build.mbaJvcxy/pbuilderrc_Hb48 --distribution unstable --hookdir /etc/pbuilder/rebuild-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/unstable-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.mbaJvcxy/b2 --logfile b2/build.log guile-fibers_1.3.1-5.dsc'
+  SUDO_GID=110
+  SUDO_UID=105
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  _='I: set'
+  http_proxy=http://46.16.76.132:3128
 I: uname -a
-  Linux ionos15-amd64 6.12.12+bpo-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.12.12-1~bpo12+1 (2025-02-23) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-32-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.129-1 (2025-03-06) x86_64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Mar  4  2025 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/1557681/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Mar  4 11:20 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/3328002/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -170,7 +202,7 @@
 Get: 59 http://deb.debian.org/debian unstable/main amd64 tex-common all 6.19 [29.4 kB]
 Get: 60 http://deb.debian.org/debian unstable/main amd64 texinfo-lib amd64 7.1.1-1+b1 [232 kB]
 Get: 61 http://deb.debian.org/debian unstable/main amd64 texinfo all 7.1.1-1 [1753 kB]
-Fetched 34.6 MB in 1s (68.0 MB/s)
+Fetched 34.6 MB in 1s (25.5 MB/s)
 Preconfiguring packages ...
 Selecting previously unselected package libproc2-0:amd64.
 (Reading database ... 
(Reading database ... 5%
(Reading database ... 10%
(Reading database ... 15%
(Reading database ... 20%
(Reading database ... 25%
(Reading database ... 30%
(Reading database ... 35%
(Reading database ... 40%
(Reading database ... 45%
(Reading database ... 50%
(Reading database ... 55%
(Reading database ... 60%
(Reading database ... 65%
(Reading database ... 70%
(Reading database ... 75%
(Reading database ... 80%
(Reading database ... 85%
(Reading database ... 90%
(Reading database ... 95%
(Reading database ... 100%
(Reading database ... 19784 files and directories currently installed.)
@@ -445,7 +477,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/guile-fibers-1.3.1/ && env PATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/games" HOME="/nonexistent/first-build" dpkg-buildpackage -us -uc -b && env PATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/games" HOME="/nonexistent/first-build" dpkg-genchanges -S  > ../guile-fibers_1.3.1-5_source.changes
+I: user script /srv/workspace/pbuilder/3328002/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/3328002/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/guile-fibers-1.3.1/ && env PATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/i/capture/the/path" HOME="/nonexistent/second-build" dpkg-buildpackage -us -uc -b && env PATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/i/capture/the/path" HOME="/nonexistent/second-build" dpkg-genchanges -S  > ../guile-fibers_1.3.1-5_source.changes
 dpkg-buildpackage: info: source package guile-fibers
 dpkg-buildpackage: info: source version 1.3.1-5
 dpkg-buildpackage: info: source distribution unstable
@@ -586,27 +622,27 @@
 removed 'fibers.info'
 make[1]: Leaving directory '/build/reproducible-path/guile-fibers-1.3.1'
    dh_auto_build -O--builddirectory=b4deb
-	cd b4deb && make -j42
+	cd b4deb && make -j20
 make[1]: Entering directory '/build/reproducible-path/guile-fibers-1.3.1/b4deb'
 mkdir -p fibers
-mkdir -p /build/reproducible-path/guile-fibers-1.3.1/b4deb/override/fibers
-mkdir -p /build/reproducible-path/guile-fibers-1.3.1/b4deb/override/fibers
 sed -e "s|@extlibdir\@|/usr/lib/x86_64-linux-gnu/guile/3.0/extensions|" \
     ../fibers/config.scm.in > fibers/config.scm
+mkdir -p /build/reproducible-path/guile-fibers-1.3.1/b4deb/override/fibers
 cp -f /build/reproducible-path/guile-fibers-1.3.1/b4deb/../fibers/epoll.scm /build/reproducible-path/guile-fibers-1.3.1/b4deb/override/fibers/events-impl.scm
+mkdir -p /build/reproducible-path/guile-fibers-1.3.1/b4deb/override/fibers
 cp -f /build/reproducible-path/guile-fibers-1.3.1/b4deb/../fibers/posix-clocks-generic.scm /build/reproducible-path/guile-fibers-1.3.1/b4deb/override/fibers/posix-clocks.scm
 make  all-am
 make[2]: Entering directory '/build/reproducible-path/guile-fibers-1.3.1/b4deb'
 restore=: && backupdir=".am$$" && \
 am__cwd=`pwd` && CDPATH="${ZSH_VERSION+.}:" && cd .. && \
 rm -rf $backupdir && mkdir $backupdir && \
-if (/bin/bash '/build/reproducible-path/guile-fibers-1.3.1/build-aux/missing' makeinfo --version) >/dev/null 2>&1; then \
+if (/bin/sh '/build/reproducible-path/guile-fibers-1.3.1/build-aux/missing' makeinfo --version) >/dev/null 2>&1; then \
   for f in ../fibers.info ../fibers.info-[0-9] ../fibers.info-[0-9][0-9] ../fibers.i[0-9] ../fibers.i[0-9][0-9]; do \
     if test -f $f; then mv $f $backupdir; restore=mv; else :; fi; \
   done; \
 else :; fi && \
 cd "$am__cwd"; \
-if /bin/bash '/build/reproducible-path/guile-fibers-1.3.1/build-aux/missing' makeinfo   -I .. \
+if /bin/sh '/build/reproducible-path/guile-fibers-1.3.1/build-aux/missing' makeinfo   -I .. \
  -o ../fibers.info ../fibers.texi; \
 then \
   rc=0; \
@@ -623,10 +659,36 @@
 ./env	\
   /usr/bin/guild-3.0 compile  -L "/build/reproducible-path/guile-fibers-1.3.1/b4deb/.."	\
   -Wunbound-variable -Warity-mismatch -Wformat -o "override/fibers/posix-clocks.go" "override/fibers/posix-clocks.scm"
-/bin/bash ./libtool  --tag=CC   --mode=compile gcc -DHAVE_CONFIG_H -I. -I..   -Wdate-time -D_FORTIFY_SOURCE=2 -I.. -Wall -Werror  -I/usr/include/guile/3.0  -I../extensions -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/guile-fibers-1.3.1=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -c -o extensions/fibers_epoll_la-epoll.lo `test -f 'extensions/epoll.c' || echo '../'`extensions/epoll.c
+/bin/sh ./libtool  --tag=CC   --mode=compile gcc -DHAVE_CONFIG_H -I. -I..   -Wdate-time -D_FORTIFY_SOURCE=2 -I.. -Wall -Werror  -I/usr/include/guile/3.0  -I../extensions -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/guile-fibers-1.3.1=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -c -o extensions/fibers_epoll_la-epoll.lo `test -f 'extensions/epoll.c' || echo '../'`extensions/epoll.c
 libtool: compile:  gcc -DHAVE_CONFIG_H -I. -I.. -Wdate-time -D_FORTIFY_SOURCE=2 -I.. -Wall -Werror -I/usr/include/guile/3.0 -I../extensions -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/guile-fibers-1.3.1=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -c ../extensions/epoll.c  -fPIC -DPIC -o extensions/.libs/fibers_epoll_la-epoll.o
-/bin/bash ./libtool  --tag=CC   --mode=link gcc -I.. -Wall -Werror  -I/usr/include/guile/3.0  -I../extensions -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/guile-fibers-1.3.1=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -export-dynamic -module -Wl,-z,relro -Wl,-z,now -o fibers-epoll.la -rpath /usr/lib/x86_64-linux-gnu/guile/3.0/extensions extensions/fibers_epoll_la-epoll.lo -lguile-3.0 -lgc -lpthread -ldl   
+wrote `override/fibers/posix-clocks.go'
+;;; note: auto-compilation is enabled, set GUILE_AUTO_COMPILE=0
+;;;       or pass the --no-auto-compile argument to disable.
+;;; compiling /usr/bin/guild-3.0
+;;; compiled /build/reproducible-path/guile-fibers-1.3.1/debian/.debhelper/generated/_source/home/.cache/guile/ccache/3.0-LE-8-4.7/usr/bin/guild-3.0.go
+/bin/sh ./libtool  --tag=CC   --mode=link gcc -I.. -Wall -Werror  -I/usr/include/guile/3.0  -I../extensions -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/guile-fibers-1.3.1=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -export-dynamic -module -Wl,-z,relro -Wl,-z,now -o fibers-epoll.la -rpath /usr/lib/x86_64-linux-gnu/guile/3.0/extensions extensions/fibers_epoll_la-epoll.lo -lguile-3.0 -lgc -lpthread -ldl   
 libtool: link: gcc -shared  -fPIC -DPIC  extensions/.libs/fibers_epoll_la-epoll.o   -lguile-3.0 -lgc -lpthread -ldl  -Werror -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/guile-fibers-1.3.1=. -fstack-protector-strong -Werror=format-security -Wl,-z -Wl,relro -Wl,-z -Wl,now   -Wl,-soname -Wl,fibers-epoll.so.0 -o .libs/fibers-epoll.so.0.0.0
+;;; note: auto-compilation is enabled, set GUILE_AUTO_COMPILE=0
+;;;       or pass the --no-auto-compile argument to disable.
+;;; compiling /usr/bin/guild-3.0
+;;; compiled /build/reproducible-path/guile-fibers-1.3.1/debian/.debhelper/generated/_source/home/.cache/guile/ccache/3.0-LE-8-4.7/usr/bin/guild-3.0.go
+b4deb/override/fibers/events-impl.scm:49:15: warning: possibly unbound variable `pipe2'
+b4deb/override/fibers/events-impl.scm:91:33: warning: possibly unbound variable `primitive-epoll-create'
+b4deb/override/fibers/events-impl.scm:94:45: warning: possibly unbound variable `EPOLLIN'
+b4deb/override/fibers/events-impl.scm:110:3: warning: possibly unbound variable `primitive-epoll-ctl'
+b4deb/override/fibers/events-impl.scm:110:40: warning: possibly unbound variable `EPOLL_CTL_ADD'
+b4deb/override/fibers/events-impl.scm:113:40: warning: possibly unbound variable `EPOLL_CTL_MOD'
+b4deb/override/fibers/events-impl.scm:122:40: warning: possibly unbound variable `EPOLL_CTL_DEL'
+b4deb/override/fibers/events-impl.scm:133:6: warning: possibly unbound variable `primitive-epoll-wake'
+b4deb/override/fibers/events-impl.scm:70:14: warning: possibly unbound variable `%sizeof-struct-epoll-event'
+b4deb/override/fibers/events-impl.scm:174:15: warning: possibly unbound variable `primitive-epoll-wait'
+b4deb/override/fibers/events-impl.scm:77:12: warning: possibly unbound variable `%offsetof-struct-epoll-event-fd'
+b4deb/override/fibers/events-impl.scm:190:41: warning: possibly unbound variable `EPOLLRDHUP'
+b4deb/override/fibers/events-impl.scm:191:26: warning: possibly unbound variable `EPOLLOUT'
+b4deb/override/fibers/events-impl.scm:192:44: warning: possibly unbound variable `EPOLLHUP'
+b4deb/override/fibers/events-impl.scm:192:53: warning: possibly unbound variable `EPOLLERR'
+b4deb/override/fibers/events-impl.scm:202:38: warning: possibly unbound variable `EPOLLONESHOT'
+wrote `override/fibers/events-impl.go'
 libtool: link: (cd ".libs" && rm -f "fibers-epoll.so.0" && ln -s "fibers-epoll.so.0.0.0" "fibers-epoll.so.0")
 libtool: link: (cd ".libs" && rm -f "fibers-epoll.so" && ln -s "fibers-epoll.so.0.0.0" "fibers-epoll.so")
 libtool: link: ( cd ".libs" && rm -f "fibers-epoll.la" && ln -s "../fibers-epoll.la" "fibers-epoll.la" )
@@ -687,55 +749,29 @@
 ./env	\
   /usr/bin/guild-3.0 compile  -L "/build/reproducible-path/guile-fibers-1.3.1/b4deb/.."	\
   -Wunbound-variable -Warity-mismatch -Wformat -o "web/server/fibers.go" "../web/server/fibers.scm"
-;;; note: auto-compilation is enabled, set GUILE_AUTO_COMPILE=0
-;;;       or pass the --no-auto-compile argument to disable.
-;;; compiling /usr/bin/guild-3.0
-;;; compiled /build/reproducible-path/guile-fibers-1.3.1/debian/.debhelper/generated/_source/home/.cache/guile/ccache/3.0-LE-8-4.7/usr/bin/guild-3.0.go
-wrote `override/fibers/posix-clocks.go'
-wrote `fibers/config.go'
 wrote `fibers/affinity.go'
+wrote `fibers/config.go'
+wrote `fibers/nameset.go'
 wrote `fibers/interrupts.go'
 wrote `fibers/counter.go'
 wrote `fibers/timers.go'
-wrote `fibers/nameset.go'
-wrote `fibers/stack.go'
 wrote `fibers/io-wakeup.go'
-wrote `fibers/deque.go'
+wrote `fibers/stack.go'
 wrote `fibers.go'
+wrote `fibers/deque.go'
+wrote `web/server/fibers.go'
 wrote `fibers/repl.go'
 wrote `fibers/conditions.go'
-wrote `web/server/fibers.go'
 wrote `fibers/operations.go'
-;;; note: auto-compilation is enabled, set GUILE_AUTO_COMPILE=0
-;;;       or pass the --no-auto-compile argument to disable.
-;;; compiling /usr/bin/guild-3.0
-;;; compiled /build/reproducible-path/guile-fibers-1.3.1/debian/.debhelper/generated/_source/home/.cache/guile/ccache/3.0-LE-8-4.7/usr/bin/guild-3.0.go
-b4deb/override/fibers/events-impl.scm:49:15: warning: possibly unbound variable `pipe2'
-b4deb/override/fibers/events-impl.scm:91:33: warning: possibly unbound variable `primitive-epoll-create'
-b4deb/override/fibers/events-impl.scm:94:45: warning: possibly unbound variable `EPOLLIN'
-b4deb/override/fibers/events-impl.scm:110:3: warning: possibly unbound variable `primitive-epoll-ctl'
-b4deb/override/fibers/events-impl.scm:110:40: warning: possibly unbound variable `EPOLL_CTL_ADD'
-b4deb/override/fibers/events-impl.scm:113:40: warning: possibly unbound variable `EPOLL_CTL_MOD'
-b4deb/override/fibers/events-impl.scm:122:40: warning: possibly unbound variable `EPOLL_CTL_DEL'
-b4deb/override/fibers/events-impl.scm:133:6: warning: possibly unbound variable `primitive-epoll-wake'
-b4deb/override/fibers/events-impl.scm:70:14: warning: possibly unbound variable `%sizeof-struct-epoll-event'
-b4deb/override/fibers/events-impl.scm:174:15: warning: possibly unbound variable `primitive-epoll-wait'
-b4deb/override/fibers/events-impl.scm:77:12: warning: possibly unbound variable `%offsetof-struct-epoll-event-fd'
-b4deb/override/fibers/events-impl.scm:190:41: warning: possibly unbound variable `EPOLLRDHUP'
-b4deb/override/fibers/events-impl.scm:191:26: warning: possibly unbound variable `EPOLLOUT'
-b4deb/override/fibers/events-impl.scm:192:44: warning: possibly unbound variable `EPOLLHUP'
-b4deb/override/fibers/events-impl.scm:192:53: warning: possibly unbound variable `EPOLLERR'
-b4deb/override/fibers/events-impl.scm:202:38: warning: possibly unbound variable `EPOLLONESHOT'
-wrote `override/fibers/events-impl.go'
+wrote `fibers/psq.go'
 wrote `fibers/channels.go'
 wrote `fibers/web/server.go'
-wrote `fibers/psq.go'
-wrote `fibers/scheduler.go'
 wrote `fibers/timer-wheel.go'
+wrote `fibers/scheduler.go'
 make[2]: Leaving directory '/build/reproducible-path/guile-fibers-1.3.1/b4deb'
 make[1]: Leaving directory '/build/reproducible-path/guile-fibers-1.3.1/b4deb'
    dh_auto_test -O--builddirectory=b4deb
-	cd b4deb && make -j42 check "TESTSUITEFLAGS=-j42 --verbose" VERBOSE=1
+	cd b4deb && make -j20 check "TESTSUITEFLAGS=-j20 --verbose" VERBOSE=1
 make[1]: Entering directory '/build/reproducible-path/guile-fibers-1.3.1/b4deb'
 make  check-am
 make[2]: Entering directory '/build/reproducible-path/guile-fibers-1.3.1/b4deb'
@@ -744,34 +780,34 @@
 assert #f equal to #f: ok
 assert #t terminates: ok
 assert (false-if-exception (begin (run-fibers) #t)) equal to #f: ok
-assert terminates: (run-fibers (lambda () (sleep 1)) #:drain? #t): ok (1.081757309 s)
-assert terminates: (run-fibers (lambda () (do-times 1 (spawn-fiber (lambda () #t)))) #:drain? #t): ok (0.031765573 s)
-assert terminates: (run-fibers (lambda () (do-times 10 (spawn-fiber (lambda () #t)))) #:drain? #t): ok (0.026402108 s)
-assert terminates: (run-fibers (lambda () (do-times 100 (spawn-fiber (lambda () #t)))) #:drain? #t): ok (0.035910065 s)
-assert terminates: (run-fibers (lambda () (do-times 1000 (spawn-fiber (lambda () #t)))) #:drain? #t): ok (0.05491058 s)
-assert terminates: (run-fibers (lambda () (do-times 10000 (spawn-fiber (lambda () #t)))) #:drain? #t): ok (0.091856311 s)
-assert terminates: (run-fibers (lambda () (do-times 100000 (spawn-fiber (lambda () #t)))) #:drain? #t): ok (0.271802879 s)
-assert terminates: (run-fibers (lambda () (do-times 100000 (spawn-fiber (lambda () #t) #:parallel? #t))) #:drain? #t): ok (0.667649008 s)
-assert terminates: (run-fibers (lambda () (do-times 100000 (spawn-fiber loop-to-1e4))) #:drain? #t): ok (2.280329856 s)
-assert terminates: (run-fibers (lambda () (do-times 100000 (spawn-fiber loop-to-1e4 #:parallel? #t))) #:drain? #t): ok (0.722875831 s)
-assert terminates: (run-fibers (lambda () (do-times 1 (spawn-fiber (lambda () (sleep 1))))) #:drain? #t): ok (1.116223612 s)
-assert terminates: (run-fibers (lambda () (do-times 10 (spawn-fiber (lambda () (sleep 1))))) #:drain? #t): ok (1.080424667 s)
-assert terminates: (run-fibers (lambda () (do-times 100 (spawn-fiber (lambda () (sleep 1))))) #:drain? #t): ok (1.116008853 s)
-assert terminates: (run-fibers (lambda () (do-times 1000 (spawn-fiber (lambda () (sleep 1))))) #:drain? #t): ok (1.06053442 s)
-assert terminates: (run-fibers (lambda () (do-times 10000 (spawn-fiber (lambda () (sleep 1))))) #:drain? #t): ok (1.147534337 s)
-assert terminates: (run-fibers (lambda () (do-times 100000 (spawn-fiber (lambda () (sleep 1))))) #:drain? #t): ok (1.504478961 s)
-assert terminates: (run-fibers (lambda () (do-times 1000000 (spawn-fiber (lambda () (sleep 1))))) #:drain? #t): ok (5.597742976 s)
-assert terminates: (run-fibers (lambda () (spawn-fiber-tree 7 (lambda () (sleep 1)))) #:drain? #t): ok (1.057410117 s)
-assert terminates: (run-fibers (lambda () (spawn-fiber-chain 5)) #:drain? #t): ok (0.042601073 s)
-assert terminates: (run-fibers (lambda () (spawn-fiber-chain 50)) #:drain? #t): ok (0.060566832 s)
-assert terminates: (run-fibers (lambda () (spawn-fiber-chain 500)) #:drain? #t): ok (0.030691585 s)
-assert terminates: (run-fibers (lambda () (spawn-fiber-chain 5000)) #:drain? #t): ok (0.05187938 s)
-assert terminates: (run-fibers (lambda () (spawn-fiber-chain 50000)) #:drain? #t): ok (0.17631722 s)
-assert terminates: (run-fibers (lambda () (spawn-fiber-chain 500000)) #:drain? #t): ok (1.441703088 s)
-assert terminates: (run-fibers (lambda () (spawn-fiber-chain 5000000)) #:drain? #t): ok (13.073982851 s)
-assert terminates: (run-fibers (lambda () (test-run-order 10)) #:parallelism 1 #:drain? #t): ok (0.04394274 s)
-assert terminates: (run-fibers (lambda () (test-wakeup-order 10)) #:parallelism 1 #:drain? #t): ok (3.73058e-4 s)
-assert terminates: (run-fibers (lambda () 1) #:drain? #t): ok (0.03934964 s)
+assert terminates: (run-fibers (lambda () (sleep 1)) #:drain? #t): ok (1.331194803 s)
+assert terminates: (run-fibers (lambda () (do-times 1 (spawn-fiber (lambda () #t)))) #:drain? #t): ok (0.225428692 s)
+assert terminates: (run-fibers (lambda () (do-times 10 (spawn-fiber (lambda () #t)))) #:drain? #t): ok (0.284148544 s)
+assert terminates: (run-fibers (lambda () (do-times 100 (spawn-fiber (lambda () #t)))) #:drain? #t): ok (0.343094618 s)
+assert terminates: (run-fibers (lambda () (do-times 1000 (spawn-fiber (lambda () #t)))) #:drain? #t): ok (0.399929622 s)
+assert terminates: (run-fibers (lambda () (do-times 10000 (spawn-fiber (lambda () #t)))) #:drain? #t): ok (0.29907545 s)
+assert terminates: (run-fibers (lambda () (do-times 100000 (spawn-fiber (lambda () #t)))) #:drain? #t): ok (1.095700014 s)
+assert terminates: (run-fibers (lambda () (do-times 100000 (spawn-fiber (lambda () #t) #:parallel? #t))) #:drain? #t): ok (1.779288665 s)
+assert terminates: (run-fibers (lambda () (do-times 100000 (spawn-fiber loop-to-1e4))) #:drain? #t): ok (8.145612037 s)
+assert terminates: (run-fibers (lambda () (do-times 100000 (spawn-fiber loop-to-1e4 #:parallel? #t))) #:drain? #t): ok (3.218831232 s)
+assert terminates: (run-fibers (lambda () (do-times 1 (spawn-fiber (lambda () (sleep 1))))) #:drain? #t): ok (1.400707971 s)
+assert terminates: (run-fibers (lambda () (do-times 10 (spawn-fiber (lambda () (sleep 1))))) #:drain? #t): ok (1.494761458 s)
+assert terminates: (run-fibers (lambda () (do-times 100 (spawn-fiber (lambda () (sleep 1))))) #:drain? #t): ok (1.355335044 s)
+assert terminates: (run-fibers (lambda () (do-times 1000 (spawn-fiber (lambda () (sleep 1))))) #:drain? #t): ok (1.402790431 s)
+assert terminates: (run-fibers (lambda () (do-times 10000 (spawn-fiber (lambda () (sleep 1))))) #:drain? #t): ok (1.766783126 s)
+assert terminates: (run-fibers (lambda () (do-times 100000 (spawn-fiber (lambda () (sleep 1))))) #:drain? #t): ok (3.659734219 s)
+assert terminates: (run-fibers (lambda () (do-times 1000000 (spawn-fiber (lambda () (sleep 1))))) #:drain? #t): ok (29.895720147 s)
+assert terminates: (run-fibers (lambda () (spawn-fiber-tree 7 (lambda () (sleep 1)))) #:drain? #t): ok (2.115427222 s)
+assert terminates: (run-fibers (lambda () (spawn-fiber-chain 5)) #:drain? #t): ok (0.507719852 s)
+assert terminates: (run-fibers (lambda () (spawn-fiber-chain 50)) #:drain? #t): ok (0.430522857 s)
+assert terminates: (run-fibers (lambda () (spawn-fiber-chain 500)) #:drain? #t): ok (0.491174418 s)
+assert terminates: (run-fibers (lambda () (spawn-fiber-chain 5000)) #:drain? #t): ok (0.747150656 s)
+assert terminates: (run-fibers (lambda () (spawn-fiber-chain 50000)) #:drain? #t): ok (1.215729467 s)
+assert terminates: (run-fibers (lambda () (spawn-fiber-chain 500000)) #:drain? #t): ok (7.479175969 s)
+assert terminates: (run-fibers (lambda () (spawn-fiber-chain 5000000)) #:drain? #t): ok (55.394783037 s)
+assert terminates: (run-fibers (lambda () (test-run-order 10)) #:parallelism 1 #:drain? #t): ok (0.067669505 s)
+assert terminates: (run-fibers (lambda () (test-wakeup-order 10)) #:parallelism 1 #:drain? #t): ok (0.019033971 s)
+assert terminates: (run-fibers (lambda () 1) #:drain? #t): ok (0.408135581 s)
 assert run-fiber-return-vals equal to (1): ok
 assert terminates: (run-fibers (lambda () (do-times 20 (check-sleep (random 1.0)))) #:drain? #t): ;;; note: auto-compilation is enabled, set GUILE_AUTO_COMPILE=0
 ;;;       or pass the --no-auto-compile argument to disable.
@@ -779,40 +815,40 @@
 WARNING: (tests basic): imported module (fibers) overrides core binding `sleep'
 ;;; compiled /build/reproducible-path/guile-fibers-1.3.1/debian/.debhelper/generated/_source/home/.cache/guile/ccache/3.0-LE-8-4.7/build/reproducible-path/guile-fibers-1.3.1/tests/basic.scm.go
 WARNING: (tests basic): imported module (fibers) overrides core binding `sleep'
-assert sleep 0.02137956005909631s < actual 0.021493543s: #t (diff: 0.5331397867337981%)
-assert sleep 0.04545132796806429s < actual 0.045628306s: #t (diff: 0.38937923235172206%)
-assert sleep 0.15703271475077155s < actual 0.157627144s: #t (diff: 0.3785384785405235%)
-assert sleep 0.15902547620589444s < actual 0.159390484s: #t (diff: 0.22952787365527172%)
-assert sleep 0.16411142561144743s < actual 0.164595081s: #t (diff: 0.2947115880265936%)
-assert sleep 0.25585190125094753s < actual 0.25636262s: #t (diff: 0.19961499076433414%)
-assert sleep 0.3256740893086778s < actual 0.326069358s: #t (diff: 0.12136940097421442%)
-assert sleep 0.3642120849870887s < actual 0.365506895s: #t (diff: 0.3555098982937975%)
-assert sleep 0.38632247855509s < actual 0.389082322s: #t (diff: 0.7143885220534546%)
-assert sleep 0.3933064424355672s < actual 0.393725427s: #t (diff: 0.10652878245222969%)
-assert sleep 0.5217687755037765s < actual 0.522539515s: #t (diff: 0.14771667688992196%)
-assert sleep 0.5272168832318792s < actual 0.527470567s: #t (diff: 0.048117534963151715%)
-assert sleep 0.5935296441954521s < actual 0.593987666s: #t (diff: 0.07716915389605623%)
-assert sleep 0.6002925660777039s < actual 0.600838677s: #t (diff: 0.09097412714344393%)
-assert sleep 0.7117131231061119s < actual 0.711960831s: #t (diff: 0.03480445784208603%)
-assert sleep 0.7240648371928885s < actual 0.724523177s: #t (diff: 0.06330093433185437%)
-assert sleep 0.8171681907384184s < actual 0.8173751s: #t (diff: 0.025320278484488364%)
-assert sleep 0.8974390722816745s < actual 0.897566915s: #t (diff: 0.014245281075228076%)
-assert sleep 0.9155614843159258s < actual 0.915951396s: #t (diff: 0.04258716544476907%)
-assert sleep 0.9821014846192979s < actual 0.982544897s: #t (diff: 0.04514934430365894%)
-ok (1.02386041 s)
+assert sleep 0.06299673055625322s < actual 0.063496666s: #t (diff: 0.7935895074750725%)
+assert sleep 0.1423917772640178s < actual 0.143354688s: #t (diff: 0.6762404083185282%)
+assert sleep 0.20180180123516106s < actual 0.203270207s: #t (diff: 0.7276475015838955%)
+assert sleep 0.20219808401766792s < actual 0.203531342s: #t (diff: 0.6593821048351686%)
+assert sleep 0.23013130914151128s < actual 0.231126405s: #t (diff: 0.4324035100659972%)
+assert sleep 0.3938384515873107s < actual 0.395294194s: #t (diff: 0.3696293256339353%)
+assert sleep 0.4374249565375389s < actual 0.439279278s: #t (diff: 0.4239176194104469%)
+assert sleep 0.4559507317823111s < actual 0.460664045s: #t (diff: 1.0337330086662173%)
+assert sleep 0.5316639469742004s < actual 0.532079412s: #t (diff: 0.078144291739938%)
+assert sleep 0.5542852051659302s < actual 0.554615383s: #t (diff: 0.059568220654746526%)
+assert sleep 0.6685370512258576s < actual 0.671282307s: #t (diff: 0.4106362944445043%)
+assert sleep 0.669206101217649s < actual 0.671830526s: #t (diff: 0.3921698827275751%)
+assert sleep 0.7147569936016828s < actual 0.715407448s: #t (diff: 0.09100357242250616%)
+assert sleep 0.7410507264290016s < actual 0.743411402s: #t (diff: 0.31855789176188937%)
+assert sleep 0.7643427579591882s < actual 0.767290632s: #t (diff: 0.3856743601107387%)
+assert sleep 0.8753884981461177s < actual 0.87937419s: #t (diff: 0.455305485772663%)
+assert sleep 0.9332558691132705s < actual 0.935296416s: #t (diff: 0.21864817080318147%)
+assert sleep 0.9623672973937041s < actual 0.96757091s: #t (diff: 0.5407096251491882%)
+assert sleep 0.9876899565164288s < actual 0.988232251s: #t (diff: 0.05490533542366916%)
+assert sleep 0.9981837340368742s < actual 0.998754321s: #t (diff: 0.05716251864956273%)
+ok (1.367386683 s)
 PASS: tests/basic.scm
 assert (condition? cv) equal to #t: ok
-assert run-fibers on (wait/timeout cv) terminates: ok (0.188485297 s)
+assert run-fibers on (wait/timeout cv) terminates: ok (0.448278207 s)
 assert run-fiber-return-vals equal to (#f): ok
-assert run-fibers on (wait/timeout cv) terminates: ok (0.108298928 s)
+assert run-fibers on (wait/timeout cv) terminates: ok (0.412946342 s)
 assert run-fiber-return-vals equal to (#f): ok
 assert (signal-condition! cv) equal to #t: ok
 assert (signal-condition! cv) equal to #f: ok
-assert run-fibers on (wait/timeout cv) terminates: ok (0.021815362 s)
+assert run-fibers on (wait/timeout cv) terminates: ok (0.689547098 s)
 assert run-fiber-return-vals equal to (#t): ok
-assert run-fibers on (wait/timeout cv) terminates: ok (0.075937247 s)
+assert run-fibers on (wait/timeout cv) terminates: ok (0.459635279 s)
 assert run-fiber-return-vals equal to (#t): ok
-assert run-fibers on (let ((cv (make-condition))) (spawn-fiber (lambda () (signal-condition! cv))) (wait cv) #t) terminates: ok (0.019390324 s)
+assert run-fibers on (let ((cv (make-condition))) (spawn-fiber (lambda () (signal-condition! cv))) (wait cv) #t) terminates: ok (0.423375247 s)
 assert run-fiber-return-vals equal to (#t): ok
 assert (let ((cv (make-condition))) (run-fibers (lambda () (spawn-fiber (lambda () (wait cv))) (yield-current-task)) #:drain? #f #:hz 0 #:parallelism 1) (signal-condition! cv)) equal to #t: ok
 ;;; note: auto-compilation is enabled, set GUILE_AUTO_COMPILE=0
@@ -820,15 +856,15 @@
 ;;; compiling /build/reproducible-path/guile-fibers-1.3.1/b4deb/../tests/conditions.scm
 ;;; compiled /build/reproducible-path/guile-fibers-1.3.1/debian/.debhelper/generated/_source/home/.cache/guile/ccache/3.0-LE-8-4.7/build/reproducible-path/guile-fibers-1.3.1/tests/conditions.scm.go
 PASS: tests/conditions.scm
-assert run-fibers on (rpc 1) terminates: ok (0.18735127 s)
+assert run-fibers on (rpc 1) terminates: ok (0.438630702 s)
 assert run-fiber-return-vals equal to (1): ok
-assert run-fibers on (rpc-fib 24) terminates: ok (1.237956779 s)
+assert run-fibers on (rpc-fib 24) terminates: ok (8.723502355 s)
 assert run-fiber-return-vals equal to (75025): ok
-assert run-fibers on (pingpong (current-processor-count) 1000) terminates: ok (0.057949738 s)
-;;; note: auto-compilation is enabled, set GUILE_AUTO_COMPILE=0
+assert run-fibers on (pingpong (current-processor-count) 1000) terminates: ;;; note: auto-compilation is enabled, set GUILE_AUTO_COMPILE=0
 ;;;       or pass the --no-auto-compile argument to disable.
 ;;; compiling /build/reproducible-path/guile-fibers-1.3.1/b4deb/../tests/channels.scm
 ;;; compiled /build/reproducible-path/guile-fibers-1.3.1/debian/.debhelper/generated/_source/home/.cache/guile/ccache/3.0-LE-8-4.7/build/reproducible-path/guile-fibers-1.3.1/tests/channels.scm.go
+ok (3.685551452 s)
 PASS: tests/channels.scm
 assert #f equal to #f: ok
 assert #t terminates: ok
@@ -843,75 +879,82 @@
 ;;; compiled /build/reproducible-path/guile-fibers-1.3.1/debian/.debhelper/generated/_source/home/.cache/guile/ccache/3.0-LE-8-4.7/build/reproducible-path/guile-fibers-1.3.1/tests/foreign.scm.go
 WARNING: (tests foreign): imported module (fibers) overrides core binding `sleep'
 PASS: tests/foreign.scm
-assert run-fibers on (readable/timeout? s) terminates: ok (0.1594708 s)
+assert run-fibers on (readable/timeout? s) terminates: ok (0.467549088 s)
 assert run-fiber-return-vals equal to (#t): ok
 assert (readable/timeout? s) equal to #t: ok
-assert run-fibers on (readable/timeout? A) terminates: ok (0.068891184 s)
+assert run-fibers on (readable/timeout? A) terminates: ok (0.572304197 s)
 assert run-fiber-return-vals equal to (#t): ok
 assert (readable/timeout? A) equal to #t: ok
-assert run-fibers on (writable/timeout? B) terminates: ok (0.081682984 s)
+assert run-fibers on (writable/timeout? B) terminates: ok (0.393494869 s)
 assert run-fiber-return-vals equal to (#f): ok
 assert (writable/timeout? B) equal to #f: ok
-assert run-fibers on (writable/timeout? B) terminates: ok (0.076163542 s)
+assert run-fibers on (writable/timeout? B) terminates: ok (0.447310632 s)
 assert run-fiber-return-vals equal to (#t): ok
-assert run-fibers on (readable/timeout? A) terminates: ok (0.049066555 s)
+assert run-fibers on (readable/timeout? A) terminates: ok (0.555836272 s)
 assert run-fiber-return-vals equal to (#f): ok
 ;;; note: auto-compilation is enabled, set GUILE_AUTO_COMPILE=0
 ;;;       or pass the --no-auto-compile argument to disable.
 ;;; compiling /build/reproducible-path/guile-fibers-1.3.1/b4deb/../tests/io-wakeup.scm
 ;;; compiled /build/reproducible-path/guile-fibers-1.3.1/debian/.debhelper/generated/_source/home/.cache/guile/ccache/3.0-LE-8-4.7/build/reproducible-path/guile-fibers-1.3.1/tests/io-wakeup.scm.go
 PASS: tests/io-wakeup.scm
-assert run-fibers on (my-param) terminates: ok (0.088614386 s)
+assert run-fibers on (my-param) terminates: ok (0.577099429 s)
 assert run-fiber-return-vals equal to (#f): ok
-assert run-fibers on (rpc (my-param)) terminates: ok (0.022486192 s)
+assert run-fibers on (rpc (my-param)) terminates: ok (0.40225397 s)
 assert run-fiber-return-vals equal to (#f): ok
-assert run-fibers on (rpc (begin (my-param 42) (my-param))) terminates: ok (0.014368129 s)
+assert run-fibers on (rpc (begin (my-param 42) (my-param))) terminates: ok (0.450692694 s)
 assert run-fiber-return-vals equal to (42): ok
-assert run-fibers on (my-param) terminates: ok (0.036257893 s)
+assert run-fibers on (my-param) terminates: ok (0.647198185 s)
 assert run-fiber-return-vals equal to (#f): ok
-assert run-fibers on (begin (my-param 100) (rpc (my-param))) terminates: ok (0.012804726 s)
+assert run-fibers on (begin (my-param 100) (rpc (my-param))) terminates: ok (0.431383696 s)
 assert run-fiber-return-vals equal to (100): ok
-assert run-fibers on (my-param) terminates: ok (0.023137759 s)
+assert run-fibers on (my-param) terminates: ok (0.426757869 s)
 assert run-fiber-return-vals equal to (#f): ok
 assert (my-param) equal to #f: ok
 assert (begin (my-param (quote foo)) (my-param)) equal to foo: ok
-assert run-fibers on (my-param) terminates: ok (0.012350303 s)
-assert run-fiber-return-vals equal to (foo): ok
-assert run-fibers on (rpc (my-param)) terminates: ok (0.026144294 s)
+assert run-fibers on (my-param) terminates: ok (0.530973531 s)
 assert run-fiber-return-vals equal to (foo): ok
-;;; note: auto-compilation is enabled, set GUILE_AUTO_COMPILE=0
+assert run-fibers on (rpc (my-param)) terminates: ok (0.526815607 s)
+assert run-fiber-return-vals equal to (foo): ;;; note: auto-compilation is enabled, set GUILE_AUTO_COMPILE=0
 ;;;       or pass the --no-auto-compile argument to disable.
 ;;; compiling /build/reproducible-path/guile-fibers-1.3.1/b4deb/../tests/parameters.scm
 ;;; compiled /build/reproducible-path/guile-fibers-1.3.1/debian/.debhelper/generated/_source/home/.cache/guile/ccache/3.0-LE-8-4.7/build/reproducible-path/guile-fibers-1.3.1/tests/parameters.scm.go
+ok
 PASS: tests/parameters.scm
-assert run-fibers on (let lp ((n 0)) (when (< n 100000000) (lp (#{1+}# n)))) terminates: ok (0.310791386 s)
-assert run-fibers on (race-until 100) terminates: ok (1.214965471 s)
+assert run-fibers on (let lp ((n 0)) (when (< n 100000000) (lp (#{1+}# n)))) terminates: ok (1.043628579 s)
+assert run-fibers on (race-until 100) terminates: ok (6.803547278 s)
 assert run-fiber-return-vals equal to (100): ;;; note: auto-compilation is enabled, set GUILE_AUTO_COMPILE=0
 ;;;       or pass the --no-auto-compile argument to disable.
 ;;; compiling /build/reproducible-path/guile-fibers-1.3.1/b4deb/../tests/preemption.scm
 ;;; compiled /build/reproducible-path/guile-fibers-1.3.1/debian/.debhelper/generated/_source/home/.cache/guile/ccache/3.0-LE-8-4.7/build/reproducible-path/guile-fibers-1.3.1/tests/preemption.scm.go
 ok
 PASS: tests/preemption.scm
-speedup for (do-times 100000 (spawn-fiber (lambda () #t) #:parallel? #t)): 0.140514605 s / 0.742899658 s = 0.189143450918105x (42 cpus)
-speedup for (do-times 40000 (spawn-fiber (lambda () (sleep 1)) #:parallel? #t)): 1.160693265 s / 1.324140075 s = 0.8765638068918047x (42 cpus)
-speedup for (do-times 100000 (spawn-fiber (lambda () (loop-to 10000)) #:parallel? #t)): 2.36447438 s / 0.701374036 s = 3.371203179240584x (42 cpus)
-speedup for (do-times 10000 (spawn-fiber (lambda () (loop-to 100000)) #:parallel? #t)): 2.241678261 s / 0.098672096 s = 22.718461975308603x (42 cpus)
-speedup for (do-times 1000 (spawn-fiber (lambda () (loop-to 1000000)) #:parallel? #t)): 2.260504745 s / 0.090506032 s = 24.976288265515826x (42 cpus)
-speedup for (do-times 100000 (spawn-fiber (lambda () (alloc-to 4 1000)) #:parallel? #t)): 3.308580907 s / 7.022061121 s = 0.4711694828610137x (42 cpus)
-speedup for (do-times 10000 (spawn-fiber (lambda () (alloc-to 4 10000)) #:parallel? #t)): 2.83876901 s / 6.644963125 s = 0.4272061344207986x (42 cpus)
-speedup for (do-times 1000 (spawn-fiber (lambda () (alloc-to 4 100000)) #:parallel? #t)): 2.808668751 s / 11.958879634 s = 0.2348605251460799x (42 cpus)
-;;; note: auto-compilation is enabled, set GUILE_AUTO_COMPILE=0
+speedup for (do-times 100000 (spawn-fiber (lambda () #t) #:parallel? #t)): 0.769642971 s / 1.761371848 s = 0.4369565528561803x (20 cpus)
+speedup for (do-times 40000 (spawn-fiber (lambda () (sleep 1)) #:parallel? #t)): 1.928494355 s / 2.759693701 s = 0.6988073909438546x (20 cpus)
+speedup for (do-times 100000 (spawn-fiber (lambda () (loop-to 10000)) #:parallel? #t)): 5.79199968 s / 2.273671217 s = 2.5474218245337448x (20 cpus)
+speedup for (do-times 10000 (spawn-fiber (lambda () (loop-to 100000)) #:parallel? #t)): 6.38568223 s / 0.876657435 s = 7.2841248759841974x (20 cpus)
+speedup for (do-times 1000 (spawn-fiber (lambda () (loop-to 1000000)) #:parallel? #t)): 5.805705718 s / 1.003597025 s = 5.78489729779739x (20 cpus)
+speedup for (do-times 100000 (spawn-fiber (lambda () (alloc-to 4 1000)) #:parallel? #t)): 13.816106262 s / 16.621865461 s = 0.8312007033396359x (20 cpus)
+speedup for (do-times 10000 (spawn-fiber (lambda () (alloc-to 4 10000)) #:parallel? #t)): 12.245531166 s / 14.225008832 s = 0.8608452416882126x (20 cpus)
+speedup for (do-times 1000 (spawn-fiber (lambda () (alloc-to 4 100000)) #:parallel? #t)): ;;; note: auto-compilation is enabled, set GUILE_AUTO_COMPILE=0
 ;;;       or pass the --no-auto-compile argument to disable.
 ;;; compiling /build/reproducible-path/guile-fibers-1.3.1/b4deb/../tests/speedup.scm
 WARNING: (tests speedup): imported module (fibers) overrides core binding `sleep'
 ;;; compiled /build/reproducible-path/guile-fibers-1.3.1/debian/.debhelper/generated/_source/home/.cache/guile/ccache/3.0-LE-8-4.7/build/reproducible-path/guile-fibers-1.3.1/tests/speedup.scm.go
 WARNING: (tests speedup): imported module (fibers) overrides core binding `sleep'
+10.240182758 s / 15.65531704 s = 0.654102547513787x (20 cpus)
 PASS: tests/speedup.scm
 ;;; note: auto-compilation is enabled, set GUILE_AUTO_COMPILE=0
 ;;;       or pass the --no-auto-compile argument to disable.
 ;;; compiling /build/reproducible-path/guile-fibers-1.3.1/b4deb/../tests/timer-wheel.scm
 ;;; compiled /build/reproducible-path/guile-fibers-1.3.1/debian/.debhelper/generated/_source/home/.cache/guile/ccache/3.0-LE-8-4.7/build/reproducible-path/guile-fibers-1.3.1/tests/timer-wheel.scm.go
 PASS: tests/timer-wheel.scm
+;;; note: auto-compilation is enabled, set GUILE_AUTO_COMPILE=0
+;;;       or pass the --no-auto-compile argument to disable.
+;;; compiling /build/reproducible-path/guile-fibers-1.3.1/b4deb/../tests/ports.scm
+WARNING: (tests ports): imported module (fibers) overrides core binding `sleep'
+;;; compiled /build/reproducible-path/guile-fibers-1.3.1/debian/.debhelper/generated/_source/home/.cache/guile/ccache/3.0-LE-8-4.7/build/reproducible-path/guile-fibers-1.3.1/tests/ports.scm.go
+WARNING: (tests ports): imported module (fibers) overrides core binding `sleep'
+success
 
 ;;; (listening-socket #<input-output: socket 12>)
 
@@ -925,20 +968,13 @@
 
 ;;; (listening-socket #<input-output: socket 13>)
 
-;;; (accepted-connection (#<input-output: socket 14> . #(2 2130706433 56576)))
+;;; (accepted-connection (#<input-output: socket 14> . #(2 2130706433 45062)))
 
 ;;; (connected #(2 2130706433 5556))
 
 ;;; (received "hello!")
 
 ;;; (echo "hello!")
-;;; note: auto-compilation is enabled, set GUILE_AUTO_COMPILE=0
-;;;       or pass the --no-auto-compile argument to disable.
-;;; compiling /build/reproducible-path/guile-fibers-1.3.1/b4deb/../tests/ports.scm
-WARNING: (tests ports): imported module (fibers) overrides core binding `sleep'
-;;; compiled /build/reproducible-path/guile-fibers-1.3.1/debian/.debhelper/generated/_source/home/.cache/guile/ccache/3.0-LE-8-4.7/build/reproducible-path/guile-fibers-1.3.1/tests/ports.scm.go
-WARNING: (tests ports): imported module (fibers) overrides core binding `sleep'
-success
 PASS: tests/ports.scm
 assert (length data) equal to 10000: ok
 assert (length data) equal to 10000: ;;; note: auto-compilation is enabled, set GUILE_AUTO_COMPILE=0
@@ -966,7 +1002,7 @@
 make[4]: Entering directory '/build/reproducible-path/guile-fibers-1.3.1/b4deb'
 make[4]: Nothing to be done for 'install-exec-am'.
  /usr/bin/mkdir -p '/build/reproducible-path/guile-fibers-1.3.1/debian/tmp/usr/lib/x86_64-linux-gnu/guile/3.0/extensions'
- /bin/bash ./libtool   --mode=install /usr/bin/install -c   fibers-epoll.la '/build/reproducible-path/guile-fibers-1.3.1/debian/tmp/usr/lib/x86_64-linux-gnu/guile/3.0/extensions'
+ /bin/sh ./libtool   --mode=install /usr/bin/install -c   fibers-epoll.la '/build/reproducible-path/guile-fibers-1.3.1/debian/tmp/usr/lib/x86_64-linux-gnu/guile/3.0/extensions'
 libtool: install: /usr/bin/install -c .libs/fibers-epoll.so.0.0.0 /build/reproducible-path/guile-fibers-1.3.1/debian/tmp/usr/lib/x86_64-linux-gnu/guile/3.0/extensions/fibers-epoll.so.0.0.0
 libtool: install: (cd /build/reproducible-path/guile-fibers-1.3.1/debian/tmp/usr/lib/x86_64-linux-gnu/guile/3.0/extensions && { ln -s -f fibers-epoll.so.0.0.0 fibers-epoll.so.0 || { rm -f fibers-epoll.so.0 && ln -s fibers-epoll.so.0.0.0 fibers-epoll.so.0; }; })
 libtool: install: (cd /build/reproducible-path/guile-fibers-1.3.1/debian/tmp/usr/lib/x86_64-linux-gnu/guile/3.0/extensions && { ln -s -f fibers-epoll.so.0.0.0 fibers-epoll.so || { rm -f fibers-epoll.so && ln -s fibers-epoll.so.0.0.0 fibers-epoll.so; }; })
@@ -1032,12 +1068,14 @@
 dpkg-buildpackage: info: binary-only upload (no source included)
 dpkg-genchanges: info: not including original source code in upload
 I: copying local configuration
+I: user script /srv/workspace/pbuilder/3328002/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/3328002/tmp/hooks/B01_cleanup finished
 I: unmounting dev/ptmx filesystem
 I: unmounting dev/pts filesystem
 I: unmounting dev/shm filesystem
 I: unmounting proc filesystem
 I: unmounting sys filesystem
 I: cleaning the build env 
-I: removing directory /srv/workspace/pbuilder/1557681 and its subdirectories
-I: Current time: Mon Apr 20 23:45:15 -12 2026
-I: pbuilder-time-stamp: 1776771915
+I: removing directory /srv/workspace/pbuilder/3328002 and its subdirectories
+I: Current time: Wed Mar 19 19:31:10 +14 2025
+I: pbuilder-time-stamp: 1742362270