Diff of the two buildlogs:

--
--- b1/build.log	2025-03-25 06:07:21.021540720 +0000
+++ b2/build.log	2025-03-25 06:09:31.831635951 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Mon Mar 24 17:55:26 -12 2025
-I: pbuilder-time-stamp: 1742882126
+I: Current time: Tue Apr 28 02:30:22 +14 2026
+I: pbuilder-time-stamp: 1777293022
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/trixie-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/2892405/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/938577/tmp/hooks/D01_modify_environment starting
+debug: Running on ionos5-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 Apr 27 12:30 /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/938577/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/938577/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=20 '
-  DISTRIBUTION='trixie'
-  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=42 '
+  DIRSTACK=()
+  DISTRIBUTION=trixie
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=x86_64
+  HOST_ARCH=amd64
   IFS=' 	
   '
-  INVOCATION_ID='013c65333d814703b4e5d136d163aa2d'
-  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='2892405'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=c74a963904c34bb49368c9552c9eec5b
+  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=938577
   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.8vzs4T5q/pbuilderrc_tyLJ --distribution trixie --hookdir /etc/pbuilder/first-build-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/trixie-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.8vzs4T5q/b1 --logfile b1/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+12'
-  USER='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://46.16.76.132:3128'
+  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.8vzs4T5q/pbuilderrc_qYZp --distribution trixie --hookdir /etc/pbuilder/rebuild-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/trixie-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.8vzs4T5q/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://213.165.73.152:3128
 I: uname -a
-  Linux ionos1-amd64 6.1.0-32-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.129-1 (2025-03-06) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.12.12+bpo-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.12.12-1~bpo12+1 (2025-02-23) x86_64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Mar  4 11:20 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/2892405/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Mar  4  2025 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/938577/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 trixie/main amd64 tex-common all 6.19 [29.4 kB]
 Get: 60 http://deb.debian.org/debian trixie/main amd64 texinfo-lib amd64 7.1.1-1+b1 [232 kB]
 Get: 61 http://deb.debian.org/debian trixie/main amd64 texinfo all 7.1.1-1 [1753 kB]
-Fetched 34.3 MB in 5s (7349 kB/s)
+Fetched 34.3 MB in 5s (6425 kB/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 ... 19809 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/938577/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/938577/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 -j20
+	cd b4deb && make -j42
 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
 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; \
@@ -623,15 +659,10 @@
 ./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   
+/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
-wrote `override/fibers/posix-clocks.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" )
@@ -692,17 +723,24 @@
 ./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/affinity.go'
 wrote `fibers/config.go'
 wrote `fibers/interrupts.go'
-wrote `fibers/nameset.go'
 wrote `fibers/counter.go'
-wrote `fibers/stack.go'
 wrote `fibers/timers.go'
-wrote `fibers/conditions.go'
-wrote `fibers.go'
+wrote `fibers/stack.go'
+wrote `fibers/nameset.go'
 wrote `fibers/deque.go'
 wrote `fibers/io-wakeup.go'
+wrote `fibers.go'
+wrote `fibers/conditions.go'
+wrote `fibers/repl.go'
+wrote `web/server/fibers.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
@@ -724,18 +762,16 @@
 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/repl.go'
-wrote `web/server/fibers.go'
-wrote `fibers/psq.go'
-wrote `fibers/channels.go'
-wrote `fibers/operations.go'
 wrote `fibers/web/server.go'
-wrote `fibers/timer-wheel.go'
+wrote `fibers/operations.go'
+wrote `fibers/channels.go'
+wrote `fibers/psq.go'
 wrote `fibers/scheduler.go'
+wrote `fibers/timer-wheel.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 -j20 check "TESTSUITEFLAGS=-j20 --verbose" VERBOSE=1
+	cd b4deb && make -j42 check "TESTSUITEFLAGS=-j42 --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'
@@ -744,174 +780,181 @@
 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 (1.501744643 s)
-assert terminates: (run-fibers (lambda () (do-times 1 (spawn-fiber (lambda () #t)))) #:drain? #t): ok (0.355577416 s)
-assert terminates: (run-fibers (lambda () (do-times 10 (spawn-fiber (lambda () #t)))) #:drain? #t): ok (0.579235089 s)
-assert terminates: (run-fibers (lambda () (do-times 100 (spawn-fiber (lambda () #t)))) #:drain? #t): ok (0.551266977 s)
-assert terminates: (run-fibers (lambda () (do-times 1000 (spawn-fiber (lambda () #t)))) #:drain? #t): ok (0.391383054 s)
-assert terminates: (run-fibers (lambda () (do-times 10000 (spawn-fiber (lambda () #t)))) #:drain? #t): ok (0.543226202 s)
-assert terminates: (run-fibers (lambda () (do-times 100000 (spawn-fiber (lambda () #t)))) #:drain? #t): ok (1.411872355 s)
-assert terminates: (run-fibers (lambda () (do-times 100000 (spawn-fiber (lambda () #t) #:parallel? #t))) #:drain? #t): ok (2.019328044 s)
-assert terminates: (run-fibers (lambda () (do-times 100000 (spawn-fiber loop-to-1e4))) #:drain? #t): ok (5.587601679 s)
-assert terminates: (run-fibers (lambda () (do-times 100000 (spawn-fiber loop-to-1e4 #:parallel? #t))) #:drain? #t): ok (2.151350133 s)
-assert terminates: (run-fibers (lambda () (do-times 1 (spawn-fiber (lambda () (sleep 1))))) #:drain? #t): ok (1.322916311 s)
-assert terminates: (run-fibers (lambda () (do-times 10 (spawn-fiber (lambda () (sleep 1))))) #:drain? #t): ok (1.427283938 s)
-assert terminates: (run-fibers (lambda () (do-times 100 (spawn-fiber (lambda () (sleep 1))))) #:drain? #t): ok (1.429062623 s)
-assert terminates: (run-fibers (lambda () (do-times 1000 (spawn-fiber (lambda () (sleep 1))))) #:drain? #t): ok (1.686796606 s)
-assert terminates: (run-fibers (lambda () (do-times 10000 (spawn-fiber (lambda () (sleep 1))))) #:drain? #t): ok (1.463553156 s)
-assert terminates: (run-fibers (lambda () (do-times 100000 (spawn-fiber (lambda () (sleep 1))))) #:drain? #t): ok (3.083298085 s)
-assert terminates: (run-fibers (lambda () (do-times 1000000 (spawn-fiber (lambda () (sleep 1))))) #:drain? #t): ok (28.991248852 s)
-assert terminates: (run-fibers (lambda () (spawn-fiber-tree 7 (lambda () (sleep 1)))) #:drain? #t): ok (2.19274103 s)
-assert terminates: (run-fibers (lambda () (spawn-fiber-chain 5)) #:drain? #t): ok (0.599246193 s)
-assert terminates: (run-fibers (lambda () (spawn-fiber-chain 50)) #:drain? #t): ok (0.423033554 s)
-assert terminates: (run-fibers (lambda () (spawn-fiber-chain 500)) #:drain? #t): ok (0.426871341 s)
-assert terminates: (run-fibers (lambda () (spawn-fiber-chain 5000)) #:drain? #t): ok (0.627222868 s)
-assert terminates: (run-fibers (lambda () (spawn-fiber-chain 50000)) #:drain? #t): ok (2.390912923 s)
-assert terminates: (run-fibers (lambda () (spawn-fiber-chain 500000)) #:drain? #t): ok (14.083267366 s)
-assert terminates: (run-fibers (lambda () (spawn-fiber-chain 5000000)) #:drain? #t): ok (104.175560449 s)
-assert terminates: (run-fibers (lambda () (test-run-order 10)) #:parallelism 1 #:drain? #t): ok (0.326775035 s)
-assert terminates: (run-fibers (lambda () (test-wakeup-order 10)) #:parallelism 1 #:drain? #t): ok (0.011064856 s)
-assert terminates: (run-fibers (lambda () 1) #:drain? #t): ok (0.399283235 s)
+assert terminates: (run-fibers (lambda () (sleep 1)) #:drain? #t): ok (1.071183599 s)
+assert terminates: (run-fibers (lambda () (do-times 1 (spawn-fiber (lambda () #t)))) #:drain? #t): ok (0.030684025 s)
+assert terminates: (run-fibers (lambda () (do-times 10 (spawn-fiber (lambda () #t)))) #:drain? #t): ok (0.019879185 s)
+assert terminates: (run-fibers (lambda () (do-times 100 (spawn-fiber (lambda () #t)))) #:drain? #t): ok (0.043449615 s)
+assert terminates: (run-fibers (lambda () (do-times 1000 (spawn-fiber (lambda () #t)))) #:drain? #t): ok (0.019939897 s)
+assert terminates: (run-fibers (lambda () (do-times 10000 (spawn-fiber (lambda () #t)))) #:drain? #t): ok (0.047482437 s)
+assert terminates: (run-fibers (lambda () (do-times 100000 (spawn-fiber (lambda () #t)))) #:drain? #t): ok (0.199898324 s)
+assert terminates: (run-fibers (lambda () (do-times 100000 (spawn-fiber (lambda () #t) #:parallel? #t))) #:drain? #t): ok (0.586377209 s)
+assert terminates: (run-fibers (lambda () (do-times 100000 (spawn-fiber loop-to-1e4))) #:drain? #t): ok (2.262923727 s)
+assert terminates: (run-fibers (lambda () (do-times 100000 (spawn-fiber loop-to-1e4 #:parallel? #t))) #:drain? #t): ok (0.659896566 s)
+assert terminates: (run-fibers (lambda () (do-times 1 (spawn-fiber (lambda () (sleep 1))))) #:drain? #t): ok (1.028766196 s)
+assert terminates: (run-fibers (lambda () (do-times 10 (spawn-fiber (lambda () (sleep 1))))) #:drain? #t): ok (1.023374894 s)
+assert terminates: (run-fibers (lambda () (do-times 100 (spawn-fiber (lambda () (sleep 1))))) #:drain? #t): ok (1.03916849 s)
+assert terminates: (run-fibers (lambda () (do-times 1000 (spawn-fiber (lambda () (sleep 1))))) #:drain? #t): ok (1.021301032 s)
+assert terminates: (run-fibers (lambda () (do-times 10000 (spawn-fiber (lambda () (sleep 1))))) #:drain? #t): ok (1.060833274 s)
+assert terminates: (run-fibers (lambda () (do-times 100000 (spawn-fiber (lambda () (sleep 1))))) #:drain? #t): ok (1.343110715 s)
+assert terminates: (run-fibers (lambda () (do-times 1000000 (spawn-fiber (lambda () (sleep 1))))) #:drain? #t): ok (5.141620123 s)
+assert terminates: (run-fibers (lambda () (spawn-fiber-tree 7 (lambda () (sleep 1)))) #:drain? #t): ok (1.037541474 s)
+assert terminates: (run-fibers (lambda () (spawn-fiber-chain 5)) #:drain? #t): ok (0.014591673 s)
+assert terminates: (run-fibers (lambda () (spawn-fiber-chain 50)) #:drain? #t): ok (0.043915524 s)
+assert terminates: (run-fibers (lambda () (spawn-fiber-chain 500)) #:drain? #t): ok (0.015207035 s)
+assert terminates: (run-fibers (lambda () (spawn-fiber-chain 5000)) #:drain? #t): ok (0.028941186 s)
+assert terminates: (run-fibers (lambda () (spawn-fiber-chain 50000)) #:drain? #t): ok (0.264466729 s)
+assert terminates: (run-fibers (lambda () (spawn-fiber-chain 500000)) #:drain? #t): ok (1.362032713 s)
+assert terminates: (run-fibers (lambda () (spawn-fiber-chain 5000000)) #:drain? #t): ok (5.809467362 s)
+assert terminates: (run-fibers (lambda () (test-run-order 10)) #:parallelism 1 #:drain? #t): ok (0.002773753 s)
+assert terminates: (run-fibers (lambda () (test-wakeup-order 10)) #:parallelism 1 #:drain? #t): ok (0.001070583 s)
+assert terminates: (run-fibers (lambda () 1) #:drain? #t): ok (0.01260537 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
+assert terminates: (run-fibers (lambda () (do-times 20 (check-sleep (random 1.0)))) #:drain? #t): assert sleep 0.0989426475802336s < actual 0.099045453s: #t (diff: 0.10390405177204674%)
+assert sleep 0.1378471137883365s < actual 0.13834881s: #t (diff: 0.36395119047166996%)
+assert sleep 0.1590422804311373s < actual 0.159330868s: #t (diff: 0.1814533645269502%)
+assert sleep 0.18006296644283037s < actual 0.180325955s: #t (diff: 0.14605366242987775%)
+assert sleep 0.20977507232978476s < actual 0.210196148s: #t (diff: 0.200727219654235%)
+assert sleep 0.23401145286587938s < actual 0.234326215s: #t (diff: 0.13450714922958465%)
+assert sleep 0.2655233929279047s < actual 0.265827226s: #t (diff: 0.11442798645534123%)
+assert sleep 0.28769138394373145s < actual 0.287766952s: #t (diff: 0.026267055770899037%)
+assert sleep 0.3215313614808873s < actual 0.321866575s: #t (diff: 0.10425531045207986%)
+assert sleep 0.3802708856655248s < actual 0.380574106s: #t (diff: 0.07973798308133483%)
+assert sleep 0.4550693130127018s < actual 0.455554944s: #t (diff: 0.10671582842692086%)
+assert sleep 0.5495034406402117s < actual 0.54991757s: #t (diff: 0.07536428876691818%)
+assert sleep 0.5862293798070268s < actual 0.586647024s: #t (diff: 0.07124245344214351%)
+assert sleep 0.6196928090325318s < actual 0.620197889s: #t (diff: 0.0815048940549616%)
+assert sleep 0.639974097678404s < actual 0.640117845s: #t (diff: 0.02246142806677936%)
+assert sleep 0.6733022470197692s < actual 0.673649113s: #t (diff: 0.0515171279713003%)
+assert sleep 0.7349390294676317s < actual 0.735115611s: #t (diff: 0.024026691370063115%)
+assert sleep 0.7674219106468254s < actual 0.767528489s: #t (diff: 0.013887843400873763%)
+assert sleep 0.8594177519082221s < actual 0.859781589s: #t (diff: 0.042335300960452%)
+assert sleep 0.8736575952314097s < actual 0.873960601s: #t (diff: 0.03468243969308775%)
+ok (0.898297336 s)
+;;; 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/basic.scm
 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 0.03633882295852618s < actual 0.039555557s: #t (diff: 8.852058981506095%)
-assert sleep 0.06299673055625322s < actual 0.063838185s: #t (diff: 1.3357112921842826%)
-assert sleep 0.1423917772640178s < actual 0.147184217s: #t (diff: 3.3656716898028662%)
-assert sleep 0.20180180123516106s < actual 0.207390767s: #t (diff: 2.769532150174459%)
-assert sleep 0.20219808401766792s < actual 0.207715793s: #t (diff: 2.728863138905883%)
-assert sleep 0.23013130914151128s < actual 0.230398604s: #t (diff: 0.11614884540736789%)
-assert sleep 0.3938384515873107s < actual 0.399239267s: #t (diff: 1.371327606769248%)
-assert sleep 0.4559507317823111s < actual 0.459134048s: #t (diff: 0.6981710952070047%)
-assert sleep 0.5316639469742004s < actual 0.535173344s: #t (diff: 0.660078052268224%)
-assert sleep 0.5542852051659302s < actual 0.554464882s: #t (diff: 0.03241595344693403%)
-assert sleep 0.6104919461576007s < actual 0.611043986s: #t (diff: 0.09042540951994057%)
-assert sleep 0.6685370512258576s < actual 0.66892083s: #t (diff: 0.0574057598511115%)
-assert sleep 0.7147569936016828s < actual 0.714974405s: #t (diff: 0.03041752655285965%)
-assert sleep 0.7410507264290016s < actual 0.7416257s: #t (diff: 0.07758896260302585%)
-assert sleep 0.7643427579591882s < actual 0.767437331s: #t (diff: 0.40486718930580584%)
-assert sleep 0.8753884981461177s < actual 0.87588187s: #t (diff: 0.05636033086190435%)
-assert sleep 0.9332558691132705s < actual 0.935139878s: #t (diff: 0.20187485009009848%)
-assert sleep 0.9623672973937041s < actual 0.963216712s: #t (diff: 0.0882630372620045%)
-assert sleep 0.9876899565164288s < actual 0.991171396s: #t (diff: 0.35248302978095136%)
-assert sleep 0.9981837340368742s < actual 1.007187243s: #t (diff: 0.9019891485021071%)
-ok (1.395011312 s)
 PASS: tests/basic.scm
 assert (condition? cv) equal to #t: ok
-assert run-fibers on (wait/timeout cv) terminates: ok (0.587364016 s)
+assert run-fibers on (wait/timeout cv) terminates: ok (0.112047606 s)
 assert run-fiber-return-vals equal to (#f): ok
-assert run-fibers on (wait/timeout cv) terminates: ok (0.415216735 s)
+assert run-fibers on (wait/timeout cv) terminates: ok (0.072813247 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 (0.502934402 s)
+assert run-fibers on (wait/timeout cv) terminates: ok (0.014732409 s)
 assert run-fiber-return-vals equal to (#t): ok
-assert run-fibers on (wait/timeout cv) terminates: ok (0.375702012 s)
+assert run-fibers on (wait/timeout cv) terminates: ok (0.022908764 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 (0.423437992 s)
+assert run-fibers on (let ((cv (make-condition))) (spawn-fiber (lambda () (signal-condition! cv))) (wait cv) #t) terminates: ok (0.012655374 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
+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: ;;; 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/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
+ok
 PASS: tests/conditions.scm
-assert run-fibers on (rpc 1) terminates: ok (0.508676814 s)
+assert run-fibers on (rpc 1) terminates: ok (0.053516853 s)
 assert run-fiber-return-vals equal to (1): ok
-assert run-fibers on (rpc-fib 24) terminates: ok (10.385580886 s)
+assert run-fibers on (rpc-fib 24) terminates: ok (1.137099644 s)
 assert run-fiber-return-vals equal to (75025): ok
-assert run-fibers on (pingpong (current-processor-count) 1000) terminates: ok (5.331035074 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 (0.047085549 s)
 PASS: tests/channels.scm
 assert #f equal to #f: ok
 assert #t terminates: ok
 assert (sleep 1) terminates: ok
 assert (perform-operation (sleep-operation 1)) terminates: ok
 assert (receive-from-fiber 42) equal to 42: ok
-assert (send-to-fiber 42) equal to 42: ok
-;;; note: auto-compilation is enabled, set GUILE_AUTO_COMPILE=0
+assert (send-to-fiber 42) equal to 42: ;;; 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/foreign.scm
 WARNING: (tests foreign): 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/foreign.scm.go
 WARNING: (tests foreign): imported module (fibers) overrides core binding `sleep'
+ok
 PASS: tests/foreign.scm
-assert run-fibers on (readable/timeout? s) terminates: ok (0.692869938 s)
+assert run-fibers on (readable/timeout? s) terminates: ok (0.12435548 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 (0.491092603 s)
+assert run-fibers on (readable/timeout? A) terminates: ok (0.069920034 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 (0.540100518 s)
+assert run-fibers on (writable/timeout? B) terminates: ok (0.04539276 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 (0.494859067 s)
+assert run-fibers on (writable/timeout? B) terminates: ok (0.066859467 s)
 assert run-fiber-return-vals equal to (#t): ok
-assert run-fibers on (readable/timeout? A) terminates: ok (0.602512861 s)
-assert run-fiber-return-vals equal to (#f): ok
-;;; note: auto-compilation is enabled, set GUILE_AUTO_COMPILE=0
+assert run-fibers on (readable/timeout? A) terminates: ok (0.029845295 s)
+assert run-fiber-return-vals equal to (#f): ;;; 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
+ok
 PASS: tests/io-wakeup.scm
-assert run-fibers on (my-param) terminates: ok (0.556975285 s)
+assert run-fibers on (my-param) terminates: ok (0.056395529 s)
 assert run-fiber-return-vals equal to (#f): ok
-assert run-fibers on (rpc (my-param)) terminates: ok (0.348134202 s)
+assert run-fibers on (rpc (my-param)) terminates: ok (0.035701428 s)
 assert run-fiber-return-vals equal to (#f): ok
-assert run-fibers on (rpc (begin (my-param 42) (my-param))) terminates: ok (0.2693065 s)
+assert run-fibers on (rpc (begin (my-param 42) (my-param))) terminates: ok (0.019395761 s)
 assert run-fiber-return-vals equal to (42): ok
-assert run-fibers on (my-param) terminates: ok (0.685357632 s)
+assert run-fibers on (my-param) terminates: ok (0.027659491 s)
 assert run-fiber-return-vals equal to (#f): ok
-assert run-fibers on (begin (my-param 100) (rpc (my-param))) terminates: ok (0.51554693 s)
+assert run-fibers on (begin (my-param 100) (rpc (my-param))) terminates: ok (0.015832313 s)
 assert run-fiber-return-vals equal to (100): ok
-assert run-fibers on (my-param) terminates: ok (0.398770349 s)
+assert run-fibers on (my-param) terminates: ok (0.02916583 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 (0.766739526 s)
+assert run-fibers on (my-param) terminates: ok (0.015857053 s)
 assert run-fiber-return-vals equal to (foo): ok
-assert run-fibers on (rpc (my-param)) terminates: ok (0.387592708 s)
+assert run-fibers on (rpc (my-param)) terminates: ok (0.03847855 s)
 assert run-fiber-return-vals equal to (foo): 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/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
 PASS: tests/parameters.scm
-assert run-fibers on (let lp ((n 0)) (when (< n 100000000) (lp (#{1+}# n)))) terminates: ok (1.650190399 s)
-assert run-fibers on (race-until 100) terminates: ok (6.070934351 s)
-assert run-fiber-return-vals equal to (100): ;;; note: auto-compilation is enabled, set GUILE_AUTO_COMPILE=0
+assert run-fibers on (let lp ((n 0)) (when (< n 100000000) (lp (#{1+}# n)))) terminates: ok (0.271045188 s)
+assert run-fibers on (race-until 100) terminates: ok (1.222142222 s)
+assert run-fiber-return-vals equal to (100): 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/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)): 0.636586733 s / 2.361651401 s = 0.2695515234511107x (20 cpus)
-speedup for (do-times 40000 (spawn-fiber (lambda () (sleep 1)) #:parallel? #t)): 1.859730661 s / 2.723215093 s = 0.6829172861814775x (20 cpus)
-speedup for (do-times 100000 (spawn-fiber (lambda () (loop-to 10000)) #:parallel? #t)): 11.141506064 s / 2.647570572 s = 4.208199842462972x (20 cpus)
-speedup for (do-times 10000 (spawn-fiber (lambda () (loop-to 100000)) #:parallel? #t)): 10.832731647 s / 1.280075662 s = 8.462571368691485x (20 cpus)
-speedup for (do-times 1000 (spawn-fiber (lambda () (loop-to 1000000)) #:parallel? #t)): 9.739317894 s / 1.008418103 s = 9.658015722869267x (20 cpus)
-speedup for (do-times 100000 (spawn-fiber (lambda () (alloc-to 4 1000)) #:parallel? #t)): 22.219069428 s / 21.850705295 s = 1.016858226223219x (20 cpus)
-speedup for (do-times 10000 (spawn-fiber (lambda () (alloc-to 4 10000)) #:parallel? #t)): 20.382537699 s / 18.802136935 s = 1.0840543162441338x (20 cpus)
+speedup for (do-times 100000 (spawn-fiber (lambda () #t) #:parallel? #t)): 0.138092153 s / 0.630365856 s = 0.2190666764159257x (42 cpus)
+speedup for (do-times 40000 (spawn-fiber (lambda () (sleep 1)) #:parallel? #t)): 1.126441444 s / 1.263278269 s = 0.8916811692578873x (42 cpus)
+speedup for (do-times 100000 (spawn-fiber (lambda () (loop-to 10000)) #:parallel? #t)): 2.376754045 s / 0.683136477 s = 3.4791789415748036x (42 cpus)
+speedup for (do-times 10000 (spawn-fiber (lambda () (loop-to 100000)) #:parallel? #t)): 2.275964252 s / 0.089102937 s = 25.543089022980244x (42 cpus)
+speedup for (do-times 1000 (spawn-fiber (lambda () (loop-to 1000000)) #:parallel? #t)): 2.243754284 s / 0.089143227 s = 25.17021606139522x (42 cpus)
+speedup for (do-times 100000 (spawn-fiber (lambda () (alloc-to 4 1000)) #:parallel? #t)): 3.650106975 s / 5.781580119 s = 0.6313338049237885x (42 cpus)
+speedup for (do-times 10000 (spawn-fiber (lambda () (alloc-to 4 10000)) #:parallel? #t)): 2.655472937 s / 5.199345631 s = 0.5107321431311094x (42 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'
-19.265720057 s / 20.350841924 s = 0.9466792641281192x (20 cpus)
+2.58933998 s / 5.46278769 s = 0.4739960853210461x (42 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>)
 
@@ -925,27 +968,20 @@
 
 ;;; (listening-socket #<input-output: socket 13>)
 
-;;; (accepted-connection (#<input-output: socket 14> . #(2 2130706433 37222)))
+;;; (accepted-connection (#<input-output: socket 14> . #(2 2130706433 54642)))
 
 ;;; (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: ok
-;;; note: auto-compilation is enabled, set GUILE_AUTO_COMPILE=0
+assert (length data) equal to 10000: ;;; 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/concurrent-web-server.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/concurrent-web-server.scm.go
+ok
 PASS: tests/concurrent-web-server.scm
 ===================
 All 11 tests passed
@@ -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/938577/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/938577/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/2892405 and its subdirectories
-I: Current time: Mon Mar 24 18:07:20 -12 2025
-I: pbuilder-time-stamp: 1742882840
+I: removing directory /srv/workspace/pbuilder/938577 and its subdirectories
+I: Current time: Tue Apr 28 02:32:30 +14 2026
+I: pbuilder-time-stamp: 1777293150