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67e45331a8
Upcoming commits will teach revlogs to leverage the new compression engine API so that new compression formats can more easily be leveraged in revlogs. We want to be sure this refactoring doesn't regress performance. So this commit introduces "perfrevchunks" to explicitly test performance of reading, decompressing, and recompressing revlog chunks. Here is output when run on the mozilla-unified repo: $ hg perfrevlogchunks -c ! read ! wall 0.346603 comb 0.350000 user 0.340000 sys 0.010000 (best of 28) ! read w/ reused fd ! wall 0.337707 comb 0.340000 user 0.320000 sys 0.020000 (best of 30) ! read batch ! wall 0.013206 comb 0.020000 user 0.000000 sys 0.020000 (best of 221) ! read batch w/ reused fd ! wall 0.013259 comb 0.030000 user 0.010000 sys 0.020000 (best of 222) ! chunk ! wall 1.909939 comb 1.910000 user 1.900000 sys 0.010000 (best of 6) ! chunk batch ! wall 1.750677 comb 1.760000 user 1.740000 sys 0.020000 (best of 6) ! compress ! wall 5.668004 comb 5.670000 user 5.670000 sys 0.000000 (best of 3) $ hg perfrevlogchunks -m ! read ! wall 0.365834 comb 0.370000 user 0.350000 sys 0.020000 (best of 26) ! read w/ reused fd ! wall 0.350160 comb 0.350000 user 0.320000 sys 0.030000 (best of 28) ! read batch ! wall 0.024777 comb 0.020000 user 0.000000 sys 0.020000 (best of 119) ! read batch w/ reused fd ! wall 0.024895 comb 0.030000 user 0.000000 sys 0.030000 (best of 118) ! chunk ! wall 2.514061 comb 2.520000 user 2.480000 sys 0.040000 (best of 4) ! chunk batch ! wall 2.380788 comb 2.380000 user 2.360000 sys 0.020000 (best of 5) ! compress ! wall 9.815297 comb 9.820000 user 9.820000 sys 0.000000 (best of 3) We already see some interesting data, such as how much slower non-batched chunk reading is and that zlib compression appears to be >2x slower than decompression. I didn't have the data when I wrote this commit message, but I ran this on Mozilla's NFS-based Mercurial server and the time for reading with a reused file descriptor was faster. So I think it is worth testing both with and without file descriptor reuse so we can make informed decisions about recycling file descriptors.
167 lines
4.6 KiB
Perl
167 lines
4.6 KiB
Perl
#require test-repo
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Set vars:
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$ . "$TESTDIR/helpers-testrepo.sh"
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$ CONTRIBDIR="$TESTDIR/../contrib"
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Prepare repo:
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$ hg init
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$ echo this is file a > a
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$ hg add a
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$ hg commit -m first
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$ echo adding to file a >> a
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$ hg commit -m second
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$ echo adding more to file a >> a
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$ hg commit -m third
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$ hg up -r 0
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1 files updated, 0 files merged, 0 files removed, 0 files unresolved
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$ echo merge-this >> a
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$ hg commit -m merge-able
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created new head
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$ hg up -r 2
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1 files updated, 0 files merged, 0 files removed, 0 files unresolved
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perfstatus
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$ cat >> $HGRCPATH << EOF
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> [extensions]
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> perfstatusext=$CONTRIBDIR/perf.py
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> [perf]
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> presleep=0
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> stub=on
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> parentscount=1
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> EOF
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$ hg help perfstatusext
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perfstatusext extension - helper extension to measure performance
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list of commands:
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perfaddremove
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(no help text available)
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perfancestors
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(no help text available)
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perfancestorset
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(no help text available)
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perfannotate (no help text available)
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perfbdiff benchmark a bdiff between revisions
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perfbranchmap
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benchmark the update of a branchmap
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perfcca (no help text available)
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perfchangegroupchangelog
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Benchmark producing a changelog group for a changegroup.
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perfchangeset
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(no help text available)
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perfctxfiles (no help text available)
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perfdiffwd Profile diff of working directory changes
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perfdirfoldmap
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(no help text available)
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perfdirs (no help text available)
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perfdirstate (no help text available)
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perfdirstatedirs
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(no help text available)
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perfdirstatefoldmap
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(no help text available)
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perfdirstatewrite
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(no help text available)
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perffncacheencode
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(no help text available)
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perffncacheload
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(no help text available)
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perffncachewrite
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(no help text available)
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perfheads (no help text available)
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perfindex (no help text available)
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perfloadmarkers
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benchmark the time to parse the on-disk markers for a repo
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perflog (no help text available)
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perflookup (no help text available)
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perflrucachedict
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(no help text available)
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perfmanifest (no help text available)
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perfmergecalculate
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(no help text available)
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perfmoonwalk benchmark walking the changelog backwards
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perfnodelookup
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(no help text available)
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perfparents (no help text available)
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perfpathcopies
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(no help text available)
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perfrawfiles (no help text available)
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perfrevlog Benchmark reading a series of revisions from a revlog.
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perfrevlogchunks
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Benchmark operations on revlog chunks.
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perfrevlogrevision
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Benchmark obtaining a revlog revision.
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perfrevrange (no help text available)
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perfrevset benchmark the execution time of a revset
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perfstartup (no help text available)
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perfstatus (no help text available)
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perftags (no help text available)
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perftemplating
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(no help text available)
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perfvolatilesets
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benchmark the computation of various volatile set
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perfwalk (no help text available)
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(use 'hg help -v perfstatusext' to show built-in aliases and global options)
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$ hg perfaddremove
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$ hg perfancestors
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$ hg perfancestorset 2
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$ hg perfannotate a
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$ hg perfbdiff -c 1
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$ hg perfbdiff --alldata 1
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$ hg perfbranchmap
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$ hg perfcca
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$ hg perfchangegroupchangelog
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$ hg perfchangeset 2
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$ hg perfctxfiles 2
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$ hg perfdiffwd
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$ hg perfdirfoldmap
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$ hg perfdirs
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$ hg perfdirstate
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$ hg perfdirstatedirs
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$ hg perfdirstatefoldmap
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$ hg perfdirstatewrite
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$ hg perffncacheencode
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$ hg perffncacheload
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$ hg perffncachewrite
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$ hg perfheads
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$ hg perfindex
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$ hg perfloadmarkers
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$ hg perflog
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$ hg perflookup 2
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$ hg perflrucache
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$ hg perfmanifest 2
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$ hg perfmergecalculate -r 3
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$ hg perfmoonwalk
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$ hg perfnodelookup 2
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$ hg perfpathcopies 1 2
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$ hg perfrawfiles 2
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$ hg perfrevlog .hg/store/data/a.i
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$ hg perfrevlogrevision -m 0
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$ hg perfrevlogchunks -c
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$ hg perfrevrange
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$ hg perfrevset 'all()'
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$ hg perfstartup
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$ hg perfstatus
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$ hg perftags
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$ hg perftemplating
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$ hg perfvolatilesets
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$ hg perfwalk
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$ hg perfparents
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Check perf.py for historical portability
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$ cd "$TESTDIR/.."
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$ (hg files -r 1.2 glob:mercurial/*.c glob:mercurial/*.py;
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> hg files -r tip glob:mercurial/*.c glob:mercurial/*.py) |
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> "$TESTDIR"/check-perf-code.py contrib/perf.py
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