Mercurial > hg
view tests/test-demandimport.py.out @ 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 | 91a2ec8e7fa0 |
children | b39f0fdb0338 |
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os = <unloaded module 'os'> os.system = <built-in function system> os = <module 'os' from '?'> util = <unloaded module 'util'> util.system = <function system at 0x?> util = <module 'mercurial.util' from '?'> util.system = <function system at 0x?> hgweb = <unloaded module 'hgweb'> hgweb_mod = <unloaded module 'hgweb_mod'> hgweb = <module 'mercurial.hgweb' from '?'> fred = <unloaded module 're'> remod = <unloaded module 're'> re = <unloaded module 'sys'> fred = <unloaded module 're'> fred.sub = <function sub at 0x?> fred = <proxied module 're'> remod = <module 're' from '?'> re = <unloaded module 'sys'> re.stderr = <open file '<whatever>', mode 'w' at 0x?> re = <proxied module 'sys'> pvecproxy = <unloaded module 'pvec'> pvecproxy.__doc__ = 'A "pvec" is ...' pvecproxy.__name__ = 'mercurial.pvec' pvecproxy.__dict__['__name__'] = 'mercurial.pvec' pvecproxy = <proxied module 'pvec'> contextlib = <unloaded module 'contextlib'> contextlib.unknownattr = ImportError: cannot import name unknownattr __import__('contextlib', ..., ['unknownattr']) = <module 'contextlib' from '?'> hasattr(contextlibimp, 'unknownattr') = False node = <module 'mercurial.node' from '?'>