Mercurial > hg
view tests/test-run-tests.py @ 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 | 2372284d9457 |
children | 75b623801f6a |
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"""test line matching with some failing examples and some which warn run-test.t only checks positive matches and can not see warnings (both by design) """ from __future__ import absolute_import, print_function import doctest import os import re # this is hack to make sure no escape characters are inserted into the output if 'TERM' in os.environ: del os.environ['TERM'] run_tests = __import__('run-tests') def prn(ex): m = ex.args[0] if isinstance(m, str): print(m) else: print(m.decode('utf-8')) def lm(expected, output): r"""check if output matches expected does it generally work? >>> lm(b'H*e (glob)\n', b'Here\n') True fail on bad test data >>> try: lm(b'a\n',b'a') ... except AssertionError as ex: print(ex) missing newline >>> try: lm(b'single backslash\n', b'single \backslash\n') ... except AssertionError as ex: prn(ex) single backslash or unknown char """ assert expected.endswith(b'\n') and output.endswith( b'\n' ), 'missing newline' assert not re.search( br'[^ \w\\/\r\n()*?]', expected + output ), b'single backslash or unknown char' test = run_tests.TTest(b'test-run-test.t', b'.', b'.') match, exact = test.linematch(expected, output) if isinstance(match, str): return 'special: ' + match elif isinstance(match, bytes): return 'special: ' + match.decode('utf-8') else: return bool(match) # do not return match object def wintests(): r"""test matching like running on windows enable windows matching on any os >>> _osaltsep = os.altsep >>> os.altsep = True >>> _osname = os.name >>> os.name = 'nt' valid match on windows >>> lm(b'g/a*/d (glob)\n', b'g\\abc/d\n') True direct matching, glob unnecessary >>> lm(b'g/b (glob)\n', b'g/b\n') 'special: -glob' missing glob >>> lm(b'/g/c/d/fg\n', b'\\g\\c\\d/fg\n') True >>> lm(b'/g/c/d/fg\n', b'\\g\\c\\d\\fg\r\n') True restore os.altsep >>> os.altsep = _osaltsep >>> os.name = _osname """ pass def otherostests(): r"""test matching like running on non-windows os disable windows matching on any os >>> _osaltsep = os.altsep >>> os.altsep = False >>> _osname = os.name >>> os.name = 'nt' backslash does not match slash >>> lm(b'h/a* (glob)\n', b'h\\ab\n') False direct matching glob can not be recognized >>> lm(b'h/b (glob)\n', b'h/b\n') True missing glob can not not be recognized >>> lm(b'/h/c/df/g/\n', b'\\h/c\\df/g\\\n') False restore os.altsep >>> os.altsep = _osaltsep >>> os.name = _osname """ pass if __name__ == '__main__': doctest.testmod()