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view contrib/relnotes @ 44363:f7459da77f23
nodemap: introduce an option to use mmap to read the nodemap mapping
The performance and memory benefit is much greater if we don't have to copy all
the data in memory for each information. So we introduce an option (on by
default) to read the data using mmap.
This changeset is the last one definition the API for index support nodemap
data. (they have to be able to use the mmaping).
Below are some benchmark comparing the best we currently have in 5.3 with the
final step of this series (using the persistent nodemap implementation in
Rust). The benchmark run `hg perfindex` with various revset and the following
variants:
Before:
* do not use the persistent nodemap
* use the CPython implementation of the index for nodemap
* use mmapping of the changelog index
After:
* use the MixedIndex Rust code, with the NodeTree object for nodemap access
(still in review)
* use the persistent nodemap data from disk
* access the persistent nodemap data through mmap
* use mmapping of the changelog index
The persistent nodemap greatly speed up most operation on very large
repositories. Some of the previously very fast lookup end up a bit slower because
the persistent nodemap has to be setup. However the absolute slowdown is very
small and won't matters in the big picture.
Here are some numbers (in seconds) for the reference copy of mozilla-try:
Revset Before After abs-change speedup
-10000: 0.004622 0.005532 0.000910 × 0.83
-10: 0.000050 0.000132 0.000082 × 0.37
tip 0.000052 0.000085 0.000033 × 0.61
0 + (-10000:) 0.028222 0.005337 -0.022885 × 5.29
0 0.023521 0.000084 -0.023437 × 280.01
(-10000:) + 0 0.235539 0.005308 -0.230231 × 44.37
(-10:) + :9 0.232883 0.000180 -0.232703 ×1293.79
(-10000:) + (:99) 0.238735 0.005358 -0.233377 × 44.55
:99 + (-10000:) 0.317942 0.005593 -0.312349 × 56.84
:9 + (-10:) 0.313372 0.000179 -0.313193 ×1750.68
:9 0.316450 0.000143 -0.316307 ×2212.93
On smaller repositories, the cost of nodemap related operation is not as big, so
the win is much more modest. Yet it helps shaving a handful of millisecond here
and there.
Here are some numbers (in seconds) for the reference copy of mercurial:
Revset Before After abs-change speedup
-10: 0.000065 0.000097 0.000032 × 0.67
tip 0.000063 0.000078 0.000015 × 0.80
0 0.000561 0.000079 -0.000482 × 7.10
-10000: 0.004609 0.003648 -0.000961 × 1.26
0 + (-10000:) 0.005023 0.003715 -0.001307 × 1.35
(-10:) + :9 0.002187 0.000108 -0.002079 ×20.25
(-10000:) + 0 0.006252 0.003716 -0.002536 × 1.68
(-10000:) + (:99) 0.006367 0.003707 -0.002660 × 1.71
:9 + (-10:) 0.003846 0.000110 -0.003736 ×34.96
:9 0.003854 0.000099 -0.003755 ×38.92
:99 + (-10000:) 0.007644 0.003778 -0.003866 × 2.02
Differential Revision: https://phab.mercurial-scm.org/D7894
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
---|---|
date | Tue, 11 Feb 2020 11:18:52 +0100 |
parents | 99e231afc29c |
children |
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#!/usr/bin/env python3 """Generate release notes from our commit log. This uses the relnotes extension directives when they're available, and falls back to our old pre-relnotes logic that used to live in the release-tools repo. """ import argparse import re import subprocess rules = { # keep r"\(issue": 100, r"\(BC\)": 100, r"\(API\)": 100, r"\(SEC\)": 100, # core commands, bump up r"(commit|files|log|pull|push|patch|status|tag|summary)(|s|es):": 20, r"(annotate|alias|branch|bookmark|clone|graft|import|verify).*:": 20, # extensions, bump up r"(mq|shelve|rebase):": 20, # newsy r": deprecate": 20, r": new.*(extension|flag|module)": 10, r"( ability|command|feature|option|support)": 10, # experimental r"hg-experimental": 20, r"(from|graduate).*experimental": 15, r"(hide|mark).*experimental": -10, # bug-like? r"(fix|don't break|improve)": 7, r"(not|n't|avoid|fix|prevent).*crash": 10, r"vulnerab": 10, # boring stuff, bump down r"^contrib": -5, r"debug": -5, r"help": -5, r"minor": -5, r"(doc|metavar|bundle2|obsolete|obsmarker|rpm|setup|debug\S+:)": -15, r"(check-code|check-commit|check-config|import-checker)": -20, r"(flake8|lintian|pyflakes|pylint)": -20, # cleanups and refactoring r"(clean ?up|white ?space|spelling|quoting)": -20, r"(flatten|dedent|indent|nesting|unnest)": -20, r"(typo|hint|note|comment|TODO|FIXME)": -20, r"(style:|convention|one-?liner)": -20, r"(argument|absolute_import|attribute|assignment|mutable)": -15, r"(scope|True|False)": -10, r"(unused|useless|unnecessar|superfluous|duplicate|deprecated)": -10, r"(redundant|pointless|confusing|uninitialized|meaningless|dead)": -10, r": (drop|remove|delete|rip out)": -10, r": (inherit|rename|simplify|naming|inline)": -10, r"(correct doc|docstring|document .* method)": -20, r"(abstract|factor|extract|prepare|split|replace| import)": -20, r": add.*(function|method|implementation|example)": -10, r": (move|extract) .* (to|into|from|out of)": -20, r": implement ": -5, r": use .* implementation": -20, r": use .* instead of": -20, # code r"_": -10, r"__": -5, r"\(\)": -5, r"\S\S\S+\.\S\S\S\S+": -5, # dumb keywords r"\S+/\S+:": -10, r"\S+\.\S+:": -10, # python compatibility r"[Pp]y(|thon) ?[23]": -20, r"pycompat": -20, r"(coerce|convert|encode) .*to (byte|sys|)(s|str|string)": -20, # tests r"^test(|s|ing|runner|-\S+):": -20, r"^(f|hghave|run-tests):": -20, r"add.* tests?": -20, r"(buildbot|fuzz|mock|ratchet)": -10, # drop r"^i18n-": -50, r"^i18n:.*(hint|comment)": -50, r"perf:": -50, r"Added.*for changeset": -50, r"^_": -50, } cutoff = 10 commits = [] groupings = [ (r"util|parsers|repo|ctx|context|revlog|filelog|alias|cmdutil", "core"), (r"revset|template|ui|dirstate|hook|i18n|transaction|wire|vfs", "core"), (r"dispatch|exchange|localrepo|streamclone|color|pager", "core"), (r"hgweb|paper|coal|gitweb|monoblue|spartan", "hgweb"), (r"pull|push|revert|resolve|annotate|bookmark|branch|clone", "commands"), (r"commands|commit|config|files|graft|import|log|merge|patch", "commands"), (r"phases|status|summary|amend|tag|help|verify", "commands"), (r"rebase|mq|convert|eol|histedit|largefiles", "extensions"), (r"shelve|unshelve", "extensions"), ] def wikify(desc): desc = desc.replace("(issue", "(Bts:issue") desc = re.sub(r"\b([0-9a-f]{12})\b", r"Cset:\1", desc) # stop ParseError from being recognized as a (nonexistent) wiki page desc = re.sub(r" ([A-Z][a-z]+[A-Z][a-z]+)\b", r" !\1", desc) # prevent wiki markup of magic methods desc = re.sub(r"\b(\S*__\S*)\b", r"`\1`", desc) return desc def main(): desc = "example: %(prog)s 4.7.2 --stoprev 4.8rc0" ap = argparse.ArgumentParser(description=desc) ap.add_argument( "startrev", metavar="REV", type=str, help=( "Starting revision for the release notes. This revision " "won't be included, but later revisions will." ), ) ap.add_argument( "--stoprev", metavar="REV", type=str, default="@", help=( "Stop revision for release notes. This revision will be included," " but no later revisions will. This revision needs to be " "a descendant of startrev." ), ) args = ap.parse_args() fromext = subprocess.check_output( [ "hg", "--config", "extensions.releasenotes=", "releasenotes", "-r", "only(%s, %s)" % (args.stoprev, args.startrev), ] ).decode("utf-8") # Find all release notes from un-relnotes-flagged commits. for entry in sorted( subprocess.check_output( [ "hg", "log", "-r", "only(%s, %s) - merge()" % (args.stoprev, args.startrev), "-T", r"{desc|firstline}\n", ] ) .decode("utf-8") .splitlines() ): desc = entry.replace("`", "'") score = 0 for rule, val in rules.items(): if re.search(rule, desc): score += val if score >= cutoff: commits.append(wikify(desc)) # Group unflagged notes. groups = {} bcs = [] apis = [] for d in commits: if "(BC)" in d: bcs.append(d) if "(API)" in d: apis.append(d) for rule, g in groupings: if re.match(rule, d): groups.setdefault(g, []).append(d) break else: groups.setdefault("unsorted", []).append(d) print(fromext) # print legacy release notes sections for g in sorted(groups): print("\n=== %s ===" % g) for d in sorted(groups[g]): print(" * %s" % d) if bcs: print("\n=== Behavior Changes ===\n") for d in sorted(bcs): print(" * %s" % d) if apis: print("\n=== Internal API Changes ===\n") for d in sorted(apis): print(" * %s" % d) if __name__ == "__main__": main()