Mercurial > hg
view tests/test-debugrename.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 | 5d9bc49b0b1e |
children | 55c6ebd11cb9 |
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$ hg init $ echo a > a $ hg ci -Am t adding a $ hg mv a b $ hg ci -Am t1 $ hg debugrename b b renamed from a:b789fdd96dc2f3bd229c1dd8eedf0fc60e2b68e3 $ hg mv b a $ hg ci -Am t2 $ hg debugrename a a renamed from b:37d9b5d994eab34eda9c16b195ace52c7b129980 $ hg debugrename --rev 1 b b renamed from a:b789fdd96dc2f3bd229c1dd8eedf0fc60e2b68e3