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Re: cherry-pick very slow on big repository




Jeff King:

Can you get a backtrace? I'd do something like:

Seems that it spends most time in diffcore_count_changes(), that is where it hits whenever I hit Ctrl+C (various line numbers 199-207 in diffcore-delta.c; this is on the v2.15.0 tag).

(gdb) bt
#0  diffcore_count_changes (src=src@entry=0x55555db99970,
    dst=dst@entry=0x55555d6a4810,
    src_count_p=src_count_p@entry=0x55555db99998,
    dst_count_p=dst_count_p@entry=0x55555d6a4838,
    src_copied=src_copied@entry=0x7fffffffd3e0,
    literal_added=literal_added@entry=0x7fffffffd3f0)
    at diffcore-delta.c:203
#1  0x00005555556dee1a in estimate_similarity (minimum_score=30000,
    dst=0x55555d6a4810, src=0x55555db99970) at diffcore-rename.c:193
#2  diffcore_rename (options=options@entry=0x7fffffffd4f0)
    at diffcore-rename.c:560
#3  0x0000555555623d83 in diffcore_std (
    options=options@entry=0x7fffffffd4f0) at diff.c:5846
#4  0x000055555564ab46 in get_renames (o=o@entry=0x7fffffffd850,
    tree=tree@entry=0x5555559d1b98,
    o_tree=o_tree@entry=0x5555559d1bc0,
    a_tree=a_tree@entry=0x5555559d1b98,
    b_tree=b_tree@entry=0x5555559d1b70,
    entries=entries@entry=0x555559351d20) at merge-recursive.c:554
#5  0x000055555564e7d9 in merge_trees (o=o@entry=0x7fffffffd850,
    head=head@entry=0x5555559d1b98, merge=<optimized out>,
    merge@entry=0x5555559d1b70, common=<optimized out>,
    common@entry=0x5555559d1bc0, result=result@entry=0x7fffffffd830)
    at merge-recursive.c:1985
#6  0x000055555569b2cc in do_recursive_merge (opts=0x7fffffffdf70,
    msgbuf=0x7fffffffd810, head=0x7fffffffd7f0,
    next_label=<optimized out>, base_label=<optimized out>,
    next=<optimized out>, base=0x5555559c1ba0) at sequencer.c:459
#7  do_pick_commit (command=TODO_PICK,
    commit=commit@entry=0x5555559c1b60,
    opts=opts@entry=0x7fffffffdf70, final_fixup=final_fixup@entry=0)
    at sequencer.c:1088
#8  0x000055555569e324 in single_pick (opts=0x7fffffffdf70,
    cmit=0x5555559c1b60) at sequencer.c:2306
#9  sequencer_pick_revisions (opts=0x7fffffffdf70)
    at sequencer.c:2355
#10 0x00005555555d4097 in run_sequencer (argc=1, argc@entry=3,
    argv=argv@entry=0x7fffffffe320, opts=<optimized out>,
    opts@entry=0x7fffffffdf70) at builtin/revert.c:200
#11 0x00005555555d449a in cmd_cherry_pick (argc=3,
    argv=0x7fffffffe320, prefix=<optimized out>)
    at builtin/revert.c:225
#12 0x0000555555567a38 in run_builtin (argv=<optimized out>,
    argc=<optimized out>, p=<optimized out>) at git.c:346
#13 handle_builtin (argc=3, argv=0x7fffffffe320) at git.c:554
#14 0x0000555555567cf6 in run_argv (argv=0x7fffffffe0e0,
    argcp=0x7fffffffe0ec) at git.c:606
#15 cmd_main (argc=<optimized out>, argv=<optimized out>)
    at git.c:683
#16 0x0000555555566e01 in main (argc=4, argv=0x7fffffffe318)
    at common-main.c:43

--
\\// Peter - http://www.softwolves.pp.se/