Mercurial > hg
view tests/test-propertycache.py.out @ 41247:a89b20a49c13
rust-cpython: using MissingAncestors from Python code
As precedently done with LazyAncestors on cpython.rs, we test for the
presence of the 'rustext' module.
incrementalmissingrevs() has two callers within the Mercurial core:
`setdiscovery.partialdiscovery` and the `only()` revset.
This move shows a significant discovery performance improvement
in cases where the baseline is slow: using perfdiscovery on the PyPy
repos, prepared with `contrib/discovery-helper <repo> 50 100`, we
get averaged medians of 403ms with the Rust version vs 742ms without
(about 45% better).
But there are still indications that performance can be worse in cases
the baseline is fast, possibly due to the conversion from Python to
Rust and back becoming the bottleneck. We could measure this on
mozilla-central in cases were the delta is just a few changesets.
This requires confirmation, but if that's the reason, then an
upcoming `partialdiscovery` fully in Rust should solve the problem.
Differential Revision: https://phab.mercurial-scm.org/D5551
author | Georges Racinet <georges.racinet@octobus.net> |
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date | Fri, 30 Nov 2018 14:35:57 +0100 |
parents | 9789670992d6 |
children |
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=== property cache === calllog: [] cached value (unfiltered): NOCACHE = first access on unfiltered, should do a call access: 0 calllog: [0] cached value (unfiltered): 0 = second access on unfiltered, should not do call access 0 calllog: [0] cached value (unfiltered): 0 = first access on "visible" view, should do a call cached value ("visible" view): NOCACHE access: 7 calllog: [0, 7] cached value (unfiltered): 0 cached value ("visible" view): 7 = second access on "visible view", should not do call access: 7 calllog: [0, 7] cached value (unfiltered): 0 cached value ("visible" view): 7 = no effect on other view cached value ("immutable" view): NOCACHE access: 9 calllog: [0, 7, 9] cached value (unfiltered): 0 cached value ("visible" view): 7 cached value ("immutable" view): 9 === unfiltered property cache === unficalllog: [] cached value (unfiltered): NOCACHE cached value ("visible" view): NOCACHE cached value ("immutable" view): NOCACHE = first access on unfiltered, should do a call access (unfiltered): 100 unficalllog: [100] cached value (unfiltered): 100 = second access on unfiltered, should not do call access (unfiltered): 100 unficalllog: [100] cached value (unfiltered): 100 = access on view should use the unfiltered cache access (unfiltered): 100 access ("visible" view): 100 access ("immutable" view): 100 unficalllog: [100] cached value (unfiltered): 100 cached value ("visible" view): NOCACHE cached value ("immutable" view): NOCACHE = even if we clear the unfiltered cache cached value (unfiltered): NOCACHE cached value ("visible" view): NOCACHE cached value ("immutable" view): NOCACHE unficalllog: [100] access ("visible" view): 100 unficalllog: [100, 100] cached value (unfiltered): 100 cached value ("visible" view): NOCACHE cached value ("immutable" view): NOCACHE access ("immutable" view): 100 unficalllog: [100, 100] cached value (unfiltered): 100 cached value ("visible" view): NOCACHE cached value ("immutable" view): NOCACHE access (unfiltered): 100 unficalllog: [100, 100] cached value (unfiltered): 100 cached value ("visible" view): NOCACHE cached value ("immutable" view): NOCACHE