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[sr #110553] Allow fetch of specific commit hash from git://git.sv.gnu.o
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INVALID.NOREPLY |
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Subject: |
[sr #110553] Allow fetch of specific commit hash from git://git.sv.gnu.org |
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Date: |
Thu, 21 Oct 2021 03:59:48 -0400 (EDT) |
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Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:93.0) Gecko/20100101 Firefox/93.0 |
Follow-up Comment #1, sr #110553 (project administration):
For some numbers, not in a VM, but on a laptop, the clone takes about 5
minutes, but the fetch shallow fetch takes about 1 minute.
On the qemu VM (with 2G of memory) its 42 minutes(!!) for the clone and 20
seconds total for the shallow fetch. The VM was on a different network with a
lot more bandwidth so receiving the objects was much faster than the laptop,
but the resolving deltas phase was much longer. It seems like the resolving
deltas duration increases non-linearly with the number of deltas.
# time git -C gnulib fetch --depth=2 origin d271f868a8d
f9bbec29049d01e056481b7a1a263
remote: Enumerating objects: 9705, done.
remote: Counting objects: 100% (9705/9705), done.
remote: Compressing objects: 100% (8661/8661), done.
remote: Total 9705 (delta 5116), reused 1992 (delta 1021), pack-reused 0
Receiving objects: 100% (9705/9705), 8.21 MiB | 1.19 MiB/s, done.
Resolving deltas: 100% (5116/5116), done.
>From https://github.com/coreutils/gnulib
* branch d271f868a8df9bbec29049d01e056481b7a1a263 -> FETCH_HEAD
real 0m13.167s
user 0m8.278s
sys 0m2.569s
# time git -C gnulib reset --hard FETCH_HEAD
Updating files: 100% (9636/9636), done.
HEAD is now at d271f86 lock: Fix link error with --enable-threads=pth.
real 0m7.529s
user 0m2.353s
sys 0m4.876s
=========================================================
# time git clone git://git.sv.gnu.org/gnulib gnulib-official.git
Cloning into 'gnulib-official.git'...
remote: Counting objects: 244240, done.
remote: Compressing objects: 100% (29927/29927), done.
remote: Total 244240 (delta 214262), reused 244208 (delta 214241)
Receiving objects: 100% (244240/244240), 51.13 MiB | 1.50 MiB/s, done.
Resolving deltas: 100% (214262/214262), done.
Updating files: 100% (10502/10502), done.
real 42m23.480s
user 41m20.532s
sys 0m25.876s
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