Mercurial > hg
view tests/test-trusted.py.out @ 44363:f7459da77f23
nodemap: introduce an option to use mmap to read the nodemap mapping
The performance and memory benefit is much greater if we don't have to copy all
the data in memory for each information. So we introduce an option (on by
default) to read the data using mmap.
This changeset is the last one definition the API for index support nodemap
data. (they have to be able to use the mmaping).
Below are some benchmark comparing the best we currently have in 5.3 with the
final step of this series (using the persistent nodemap implementation in
Rust). The benchmark run `hg perfindex` with various revset and the following
variants:
Before:
* do not use the persistent nodemap
* use the CPython implementation of the index for nodemap
* use mmapping of the changelog index
After:
* use the MixedIndex Rust code, with the NodeTree object for nodemap access
(still in review)
* use the persistent nodemap data from disk
* access the persistent nodemap data through mmap
* use mmapping of the changelog index
The persistent nodemap greatly speed up most operation on very large
repositories. Some of the previously very fast lookup end up a bit slower because
the persistent nodemap has to be setup. However the absolute slowdown is very
small and won't matters in the big picture.
Here are some numbers (in seconds) for the reference copy of mozilla-try:
Revset Before After abs-change speedup
-10000: 0.004622 0.005532 0.000910 × 0.83
-10: 0.000050 0.000132 0.000082 × 0.37
tip 0.000052 0.000085 0.000033 × 0.61
0 + (-10000:) 0.028222 0.005337 -0.022885 × 5.29
0 0.023521 0.000084 -0.023437 × 280.01
(-10000:) + 0 0.235539 0.005308 -0.230231 × 44.37
(-10:) + :9 0.232883 0.000180 -0.232703 ×1293.79
(-10000:) + (:99) 0.238735 0.005358 -0.233377 × 44.55
:99 + (-10000:) 0.317942 0.005593 -0.312349 × 56.84
:9 + (-10:) 0.313372 0.000179 -0.313193 ×1750.68
:9 0.316450 0.000143 -0.316307 ×2212.93
On smaller repositories, the cost of nodemap related operation is not as big, so
the win is much more modest. Yet it helps shaving a handful of millisecond here
and there.
Here are some numbers (in seconds) for the reference copy of mercurial:
Revset Before After abs-change speedup
-10: 0.000065 0.000097 0.000032 × 0.67
tip 0.000063 0.000078 0.000015 × 0.80
0 0.000561 0.000079 -0.000482 × 7.10
-10000: 0.004609 0.003648 -0.000961 × 1.26
0 + (-10000:) 0.005023 0.003715 -0.001307 × 1.35
(-10:) + :9 0.002187 0.000108 -0.002079 ×20.25
(-10000:) + 0 0.006252 0.003716 -0.002536 × 1.68
(-10000:) + (:99) 0.006367 0.003707 -0.002660 × 1.71
:9 + (-10:) 0.003846 0.000110 -0.003736 ×34.96
:9 0.003854 0.000099 -0.003755 ×38.92
:99 + (-10000:) 0.007644 0.003778 -0.003866 × 2.02
Differential Revision: https://phab.mercurial-scm.org/D7894
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
---|---|
date | Tue, 11 Feb 2020 11:18:52 +0100 |
parents | dbaf9aabfb69 |
children | c9b14c56fc2b |
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# same user, same group trusted global = /some/path local = /another/path untrusted . . global = /some/path . . local = /another/path # same user, different group trusted global = /some/path local = /another/path untrusted . . global = /some/path . . local = /another/path # different user, same group not trusting file .hg/hgrc from untrusted user abc, group bar trusted global = /some/path untrusted . . global = /some/path . . local = /another/path # different user, same group, but we trust the group trusted global = /some/path local = /another/path untrusted . . global = /some/path . . local = /another/path # different user, different group not trusting file .hg/hgrc from untrusted user abc, group def trusted global = /some/path untrusted . . global = /some/path . . local = /another/path # different user, different group, but we trust the user trusted global = /some/path local = /another/path untrusted . . global = /some/path . . local = /another/path # different user, different group, but we trust the group trusted global = /some/path local = /another/path untrusted . . global = /some/path . . local = /another/path # different user, different group, but we trust the user and the group trusted global = /some/path local = /another/path untrusted . . global = /some/path . . local = /another/path # we trust all users # different user, different group trusted global = /some/path local = /another/path untrusted . . global = /some/path . . local = /another/path # we trust all groups # different user, different group trusted global = /some/path local = /another/path untrusted . . global = /some/path . . local = /another/path # we trust all users and groups # different user, different group trusted global = /some/path local = /another/path untrusted . . global = /some/path . . local = /another/path # we don't get confused by users and groups with the same name # different user, different group not trusting file .hg/hgrc from untrusted user abc, group def trusted global = /some/path untrusted . . global = /some/path . . local = /another/path # list of user names # different user, different group, but we trust the user trusted global = /some/path local = /another/path untrusted . . global = /some/path . . local = /another/path # list of group names # different user, different group, but we trust the group trusted global = /some/path local = /another/path untrusted . . global = /some/path . . local = /another/path # Can't figure out the name of the user running this process # different user, different group not trusting file .hg/hgrc from untrusted user abc, group def trusted global = /some/path untrusted . . global = /some/path . . local = /another/path # prints debug warnings # different user, different group not trusting file .hg/hgrc from untrusted user abc, group def trusted ignoring untrusted configuration option paths.local = /another/path global = /some/path untrusted . . global = /some/path . ignoring untrusted configuration option paths.local = /another/path . local = /another/path # report_untrusted enabled without debug hides warnings # different user, different group trusted global = /some/path untrusted . . global = /some/path . . local = /another/path # report_untrusted enabled with debug shows warnings # different user, different group not trusting file .hg/hgrc from untrusted user abc, group def trusted ignoring untrusted configuration option paths.local = /another/path global = /some/path untrusted . . global = /some/path . ignoring untrusted configuration option paths.local = /another/path . local = /another/path # ui.readconfig sections quux # read trusted, untrusted, new ui, trusted not trusting file foobar from untrusted user abc, group def trusted: ignoring untrusted configuration option foobar.baz = quux None untrusted: quux # error handling # file doesn't exist # same user, same group # different user, different group # parse error # different user, different group not trusting file .hg/hgrc from untrusted user abc, group def ignored: ('foo', '.hg/hgrc:1') # same user, same group ParseError('foo', '.hg/hgrc:1') # access typed information # different user, different group not trusting file .hg/hgrc from untrusted user abc, group def # suboptions, trusted and untrusted (None, []) ('main', [('one', 'one'), ('two', 'two')]) # path, trusted and untrusted None .hg/monty/python # bool, trusted and untrusted False True # int, trusted and untrusted 0 42 # bytes, trusted and untrusted 0 84934656 # list, trusted and untrusted [] ['spam', 'ham', 'eggs']