Mercurial > hg
view tests/test-diff-newlines.t @ 33799:05264fc9d8d6
util: make nogc effective for CPython
279cd80059d4 made `util.nogc` a no-op. It was to optimize PyPy. But it slows
down CPython if many objects (like 300k+) are created.
For example, running `hg log -r .` without extensions in `hg-committed` with
14k+ obsmarkers have the following times:
before | after
hg | chg | hg | chg
-----------------------------
1.262 | 0.860 | 1.077 | 0.619 (seconds, best of 20 runs)
Therefore let's re-enable nogc for CPython.
Differential Revision: https://phab.mercurial-scm.org/D402
author | Jun Wu <quark@fb.com> |
---|---|
date | Mon, 14 Aug 2017 22:28:59 -0700 |
parents | aaa1f8f514cf |
children | 5abc47d4ca6b |
line wrap: on
line source
$ hg init $ $PYTHON -c 'open("a", "wb").write(b"confuse str.splitlines\nembedded\rnewline\n")' $ hg ci -Ama -d '1 0' adding a $ echo clean diff >> a $ hg ci -mb -d '2 0' $ hg diff -r0 -r1 diff -r 107ba6f817b5 -r 310ce7989cdc a --- a/a Thu Jan 01 00:00:01 1970 +0000 +++ b/a Thu Jan 01 00:00:02 1970 +0000 @@ -1,2 +1,3 @@ confuse str.splitlines embedded\r (no-eol) (esc) newline +clean diff