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view tests/test-push-cgi.t @ 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 | 5abc47d4ca6b |
children | d5cd1fd690f3 |
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#require no-msys # MSYS will translate web paths as if they were file paths This is a test of the push wire protocol over CGI-based hgweb. initialize repository $ hg init r $ cd r $ echo a > a $ hg ci -A -m "0" adding a $ echo '[web]' > .hg/hgrc $ echo 'allow_push = *' >> .hg/hgrc $ echo 'push_ssl = false' >> .hg/hgrc create hgweb invocation script $ cat >hgweb.cgi <<HGWEB > import cgitb > cgitb.enable() > from mercurial import demandimport; demandimport.enable() > from mercurial.hgweb import hgweb > from mercurial.hgweb import wsgicgi > application = hgweb(b'.', b'test repository') > wsgicgi.launch(application) > HGWEB $ chmod 755 hgweb.cgi test preparation $ . "$TESTDIR/cgienv" $ REQUEST_METHOD="POST"; export REQUEST_METHOD $ CONTENT_TYPE="application/octet-stream"; export CONTENT_TYPE $ hg bundle --type v1 --all bundle.hg 1 changesets found $ CONTENT_LENGTH=279; export CONTENT_LENGTH; expect failure because heads doesn't match (formerly known as 'unsynced changes') $ QUERY_STRING="cmd=unbundle&heads=0000000000000000000000000000000000000000"; export QUERY_STRING $ "$PYTHON" hgweb.cgi <bundle.hg >page1 2>&1 $ cat page1 Status: 200 Script output follows\r (esc) Content-Type: application/mercurial-0.1\r (esc) Content-Length: 64\r (esc) \r (esc) 0 repository changed while preparing changes - please try again successful force push $ QUERY_STRING="cmd=unbundle&heads=666f726365"; export QUERY_STRING $ "$PYTHON" hgweb.cgi <bundle.hg >page2 2>&1 $ cat page2 Status: 200 Script output follows\r (esc) Content-Type: application/mercurial-0.1\r (esc) Content-Length: 102\r (esc) \r (esc) 1 adding changesets adding manifests adding file changes added 0 changesets with 0 changes to 1 files successful push, list of heads $ QUERY_STRING="cmd=unbundle&heads=f7b1eb17ad24730a1651fccd46c43826d1bbc2ac"; export QUERY_STRING $ "$PYTHON" hgweb.cgi <bundle.hg >page3 2>&1 $ cat page3 Status: 200 Script output follows\r (esc) Content-Type: application/mercurial-0.1\r (esc) Content-Length: 102\r (esc) \r (esc) 1 adding changesets adding manifests adding file changes added 0 changesets with 0 changes to 1 files successful push, SHA1 hash of heads (unbundlehash capability) $ QUERY_STRING="cmd=unbundle&heads=686173686564 5a785a5f9e0d433b88ed862b206b011b0c3a9d13"; export QUERY_STRING $ "$PYTHON" hgweb.cgi <bundle.hg >page4 2>&1 $ cat page4 Status: 200 Script output follows\r (esc) Content-Type: application/mercurial-0.1\r (esc) Content-Length: 102\r (esc) \r (esc) 1 adding changesets adding manifests adding file changes added 0 changesets with 0 changes to 1 files $ cd ..