Mercurial > hg
view contrib/fixpax.py @ 34065:c6c8a52e28c9
revset: optimize "draft() & ::x" pattern
The `draft() & ::x` type query could be common for selecting one or more
draft feature branches being worked on.
Before this patch, `::x` may travel through the changelog DAG for a long
distance until it gets a smaller revision number than `min(draft())`. It
could be very slow on long changelog with distant (in terms of revision
numbers) drafts.
This patch adds a fast path for this situation, and will stop traveling the
changelog DAG once `::x` hits a non-draft revision.
The fast path also works for `secret()` and `not public()`.
To measure the performance difference, I used drawdag to create a repo that
emulates distant drafts:
DRAFT4
|
DRAFT3 # draft
/
PUBLIC9999 # public
|
PUBLIC9998
|
. DRAFT2
. |
. DRAFT1 # draft
| /
PUBLIC0001 # public
And measured the performance using the repo:
(BEFORE)
$ hg perfrevset 'draft() & ::(DRAFT2+DRAFT4)'
! wall 0.017132 comb 0.010000 user 0.010000 sys 0.000000 (best of 156)
$ hg perfrevset 'draft() & ::(all())'
! wall 0.024221 comb 0.030000 user 0.030000 sys 0.000000 (best of 113)
(AFTER)
$ hg perfrevset 'draft() & ::(DRAFT2+DRAFT4)'
! wall 0.000243 comb 0.000000 user 0.000000 sys 0.000000 (best of 9303)
$ hg perfrevset 'draft() & ::(all())'
! wall 0.004319 comb 0.000000 user 0.000000 sys 0.000000 (best of 655)
Differential Revision: https://phab.mercurial-scm.org/D441
author | Jun Wu <quark@fb.com> |
---|---|
date | Mon, 28 Aug 2017 14:49:00 -0700 |
parents | 00f317788d33 |
children |
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#!/usr/bin/env python # fixpax - fix ownership in bdist_mpkg output # # Copyright 2015 Matt Mackall <mpm@selenic.com> # # This software may be used and distributed according to the terms of the # MIT license (http://opensource.org/licenses/MIT) """Set file ownership to 0 in an Archive.pax.gz. Suitable for fixing files bdist_mpkg output: *.mpkg/Contents/Packages/*.pkg/Contents/Archive.pax.gz """ from __future__ import absolute_import, print_function import gzip import os import sys def fixpax(iname, oname): i = gzip.GzipFile(iname) o = gzip.GzipFile(oname, "w") while True: magic = i.read(6) dev = i.read(6) ino = i.read(6) mode = i.read(6) i.read(6) # uid i.read(6) # gid nlink = i.read(6) rdev = i.read(6) mtime = i.read(11) namesize = i.read(6) filesize = i.read(11) name = i.read(int(namesize, 8)) data = i.read(int(filesize, 8)) o.write(magic) o.write(dev) o.write(ino) o.write(mode) o.write("000000") o.write("000000") o.write(nlink) o.write(rdev) o.write(mtime) o.write(namesize) o.write(filesize) o.write(name) o.write(data) if name.startswith("TRAILER!!!"): o.write(i.read()) break o.close() i.close() if __name__ == '__main__': for iname in sys.argv[1:]: print('fixing file ownership in %s' % iname) oname = sys.argv[1] + '.tmp' fixpax(iname, oname) os.rename(oname, iname)