Самый быстрый пакетный менеджер станет ещё быстрее

aleksej@lenovo:~/Загрузки$ grep -rw --include=*.c 'fsync\|fflush' pacman/
pacman/lib/libalpm/log.c:		fflush(handle->logstream);
pacman/lib/libalpm/util.c:	fflush(NULL);
pacman/src/pacman/callback.c:	fflush(stdout);
pacman/src/pacman/callback.c:	fflush(stdout);
pacman/src/pacman/callback.c:		fflush(stdout);
pacman/src/pacman/callback.c:		fflush(stderr);
pacman/src/pacman/callback.c:			fflush(stdout);
pacman/src/pacman/files.c:	fflush(stdout);
pacman/src/pacman/package.c:	fflush(stdout);
pacman/src/pacman/util.c:		fflush(stream);
pacman/src/pacman/util.c:		fflush(stream);
pacman/src/pacman/util.c:	fflush(stdout);
pacman/src/pacman/util.c:	fflush(stderr);
pacman/src/pacman/util.c:	fflush(stream);
pacman/src/pacman/util.c:	fflush(stdout);

aleksej@lenovo:~/Загрузки$ grep -rw --include=*.c 'fsync\|fflush' dpkg/
dpkg/utils/update-alternatives.c:	if (fflush(ctx.fh))
dpkg/utils/update-alternatives.c:	if (fsync(fileno(ctx.fh)))
dpkg/dpkg-deb/build.c:  if (fsync(ar->fd))
dpkg/lib/dpkg/mlib.c:  fflush(f);
dpkg/lib/dpkg/dbmodify.c:  if (fflush(importanttmp))
dpkg/lib/dpkg/dbmodify.c:  if (fflush(importanttmp))
dpkg/lib/dpkg/dbmodify.c:  if (fsync(fileno(importanttmp)))
dpkg/lib/dpkg/dbmodify.c:    ohshite(_("unable to fsync updated status of '%.250s'"),
dpkg/lib/dpkg/atomic-file.c:	if (fflush(file->fp))
dpkg/lib/dpkg/atomic-file.c:	if (fsync(fileno(file->fp)))
dpkg/lib/dpkg/dir.c:	if (fsync(fd))
dpkg/lib/dpkg/dir.c:	if (fsync(fd))
dpkg/lib/dpkg/compress.c:	/* Because BZ2_bzWriteClose has done a fflush on the file handle,
dpkg/lib/compat/vsnprintf.c:	if (fflush(file))
dpkg/src/archives.c:   * asynchronous hint for the kernel, we are doing an fsync() later on
dpkg/src/archives.c:    /* Postpone the fsync, to try to avoid massive I/O degradation. */
dpkg/src/archives.c:     * asynchronous hint for the kernel, we are doing an fsync() later on
dpkg/src/archives.c:      debug(dbg_eachfiledetail, "deferred extract needs fsync");
dpkg/src/archives.c:      if (fsync(fd))
dpkg/src/unpack.c:  fflush(stdout);
dpkg/src/unpack.c:   * explicit fsync()s, we have to do them here.
dpkg/src/divertcmd.c:	if (fsync(dstfd))
dpkg/dpkg-split/queue.c:    if (fsync(fd_dst))
dpkg/dpkg-split/join.c:  if (fsync(fd_out))

$ podman run -it --rm archlinux
[root@163756f4cb76 /]# echo 'Server = http://mirror.yandex.ru/archlinux/$repo/os/$arch' > /etc/pacman.d/mirrorlist
[root@163756f4cb76 /]# time pacman -Sy linux-firmware --noconfirm
:: Synchronizing package databases...
 core                                                                  133.5 KiB  3.26M/s 00:00 [########################################################] 100%
 extra                                                                1645.5 KiB  17.1M/s 00:00 [########################################################] 100%
 community                                                               4.9 MiB  21.2M/s 00:00 [########################################################] 100%
resolving dependencies...
looking for conflicting packages...

Packages (1) linux-firmware-20190923.417a9c6-1

Total Download Size:    82.02 MiB
Total Installed Size:  470.66 MiB

:: Proceed with installation? [Y/n]
:: Retrieving packages...
 linux-firmware-20190923.417a9c6-1-any                                  82.0 MiB  8.46M/s 00:10 [########################################################] 100%
(1/1) checking keys in keyring                                                                  [########################################################] 100%
(1/1) checking package integrity                                                                [########################################################] 100%
(1/1) loading package files                                                                     [########################################################] 100%
(1/1) checking for file conflicts                                                               [########################################################] 100%
(1/1) checking available disk space                                                             [########################################################] 100%
:: Processing package changes...
(1/1) installing linux-firmware                                                                 [########################################################] 100%
:: Running post-transaction hooks...
(1/2) Creating temporary files...
<...>
(2/2) Arming ConditionNeedsUpdate...

real    0m15.573s
user    0m5.095s
sys     0m0.581s

$ podman run -it --rm alpine
/ # echo 'http://mirror.yandex.ru/mirrors/alpine/v3.10/main' > /etc/apk/repositories
/ # echo 'http://mirror.yandex.ru/mirrors/alpine/v3.10/community' >> /etc/apk/repositories
/ # time apk add linux-firmware
fetch http://mirror.yandex.ru/mirrors/alpine/v3.10/main/x86_64/APKINDEX.tar.gz
fetch http://mirror.yandex.ru/mirrors/alpine/v3.10/community/x86_64/APKINDEX.tar.gz
(1/84) Installing linux-firmware-yamaha (20190322-r1)
<...>
(84/84) Installing linux-firmware (20190322-r1)
OK: 442 MiB in 98 packages
real    0m 23.03s
user    0m 2.45s
sys     0m 0.62s

pacman -U packagename.tar.gz
apk add --allow-untrusted packagename.apk