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Joey Hess 2022-03-07 15:18:30 -04:00
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[[!comment format=mdwn
username="joey"
subject="""comment 3"""
date="2022-03-07T19:09:17Z"
content="""
Cannot reproduce that:
joey@darkstar:/tmp/rr>/usr/bin/time git-annex fsck bigfile
fsck bigfile (checksum...) ok
(recording state in git...)
10.08user 0.35system 0:10.40elapsed 100%CPU (0avgtext+0avgdata 43500maxresident)k
joey@darkstar:/tmp/rr>/usr/bin/time sha256sum bigfile
7219108977be820830169fc13fded5000e9db329fab4e687fc14236f932d4060 bigfile
11.00user 0.28system 0:11.29elapsed 99%CPU (0avgtext+0avgdata 1956maxresident)k
120inputs+0outputs (2major+105minor)pagefaults 0swaps
(1 gb file; tmpfs)
git-annex simply uses
[cryptonite](https://hackage.haskell.org/package/cryptonite) for hashing.
Which is a thin wrapper around C code, and contains optimised routines for
some processors, generally copied from the reference C implementations.
The block size is 32 kb. This can be changed in Utility/Metered.hs
in defaultChunkSize.
"""]]