Mercurial > hg
view tests/test-hgweb-descend-empties.t @ 42743:8c9a6adec67a
rust-discovery: using the children cache in add_missing
The DAG range computation often needs to get back to very old
revisions, and turns out to be disproportionately long, given
that the end goal is to remove the descendents of the given
missing revisons from the undecided set.
The fast iteration capabilities available in the Rust case make
it possible to avoid the DAG range entirely, at the cost of
precomputing the children cache, and to simply iterate on
children of the given missing revisions.
This is a case where staying on the same side of the interface
between the two languages has clear benefits.
On discoveries with initial undecided sets
small enough to bypass sampling entirely, the total cost of
computing the children cache and the subsequent iteration
becomes better than the Python + C counterpart, which relies on
reachableroots2.
For example, on a repo with more than one million revisions with
an initial undecided set of 11 elements, we get these figures:
Rust version with simple iteration
addcommons: 57.287us
first undecided computation: 184.278334ms
first children cache computation: 131.056us
addmissings iteration: 42.766us
first addinfo total: 185.24 ms
Python + C version
first addcommons: 0.29 ms
addcommons 0.21 ms
first undecided computation 191.35 ms
addmissings 45.75 ms
first addinfo total: 237.77 ms
On discoveries with large undecided sets, the initial price paid
makes the first addinfo slower than the Python + C version,
but that's more than compensated by the gain in sampling and
subsequent iterations.
Here's an extreme example with an undecided set of a million revisions:
Rust version:
first undecided computation: 293.842629ms
first children cache computation: 407.911297ms
addmissings iteration: 34.312869ms
first addinfo total: 776.02 ms
taking initial sample
query 2: sampling time: 1318.38 ms
query 2; still undecided: 1005013, sample size is: 200
addmissings: 143.062us
Python + C version:
first undecided computation 298.13 ms
addmissings 80.13 ms
first addinfo total: 399.62 ms
taking initial sample
query 2: sampling time: 3957.23 ms
query 2; still undecided: 1005013, sample size is: 200
addmissings 52.88 ms
Differential Revision: https://phab.mercurial-scm.org/D6428
| author | Georges Racinet <georges.racinet@octobus.net> |
|---|---|
| date | Tue, 16 Apr 2019 01:16:39 +0200 |
| parents | 273ce823ba5c |
| children |
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line source
#require serve Test chains of near empty directories, terminating 3 different ways: - a1: file at level 4 (deepest) - b1: two dirs at level 3 - d1: file at level 2 Set up the repo $ hg init test $ cd test $ mkdir -p a1/a2/a3/a4 $ mkdir -p b1/b2/b3/b4 $ mkdir -p b1/b2/b3/c4 $ mkdir -p d1/d2/d3/d4 $ echo foo > a1/a2/a3/a4/foo $ echo foo > b1/b2/b3/b4/foo $ echo foo > b1/b2/b3/c4/foo $ echo foo > d1/d2/d3/d4/foo $ echo foo > d1/d2/foo $ hg ci -Ama adding a1/a2/a3/a4/foo adding b1/b2/b3/b4/foo adding b1/b2/b3/c4/foo adding d1/d2/d3/d4/foo adding d1/d2/foo $ hg serve -n test -p $HGPORT -d --pid-file=hg.pid -E errors.log $ cat hg.pid >> $DAEMON_PIDS manifest with descending (paper) $ get-with-headers.py $LOCALIP:$HGPORT 'file' 200 Script output follows <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US"> <head> <link rel="icon" href="/static/hgicon.png" type="image/png" /> <meta name="robots" content="index, nofollow" /> <link rel="stylesheet" href="/static/style-paper.css" type="text/css" /> <script type="text/javascript" src="/static/mercurial.js"></script> <title>test: c9f45f7a1659 /</title> </head> <body> <div class="container"> <div class="menu"> <div class="logo"> <a href="https://mercurial-scm.org/"> <img src="/static/hglogo.png" alt="mercurial" /></a> </div> <ul> <li><a href="/shortlog/tip">log</a></li> <li><a href="/graph/tip">graph</a></li> <li><a href="/tags">tags</a></li> <li><a href="/bookmarks">bookmarks</a></li> <li><a href="/branches">branches</a></li> </ul> <ul> <li><a href="/rev/tip">changeset</a></li> <li class="active">browse</li> </ul> <ul> </ul> <ul> <li><a href="/help">help</a></li> </ul> </div> <div class="main"> <h2 class="breadcrumb"><a href="/">Mercurial</a> </h2> <h3> directory / @ 0:<a href="/rev/c9f45f7a1659">c9f45f7a1659</a> <span class="phase">draft</span> <span class="branchhead">default</span> <span class="tag">tip</span> </h3> <form class="search" action="/log"> <p><input name="rev" id="search1" type="text" size="30" value="" /></p> <div id="hint">Find changesets by keywords (author, files, the commit message), revision number or hash, or <a href="/help/revsets">revset expression</a>.</div> </form> <table class="bigtable"> <thead> <tr> <th class="name">name</th> <th class="size">size</th> <th class="permissions">permissions</th> </tr> </thead> <tbody class="stripes2"> <tr class="fileline"> <td class="name"> <a href="/file/tip/a1"> <img src="/static/coal-folder.png" alt="dir."/> a1/ </a> <a href="/file/tip/a1/a2/a3/a4"> a2/a3/a4 </a> </td> <td class="size"></td> <td class="permissions">drwxr-xr-x</td> </tr> <tr class="fileline"> <td class="name"> <a href="/file/tip/b1"> <img src="/static/coal-folder.png" alt="dir."/> b1/ </a> <a href="/file/tip/b1/b2/b3"> b2/b3 </a> </td> <td class="size"></td> <td class="permissions">drwxr-xr-x</td> </tr> <tr class="fileline"> <td class="name"> <a href="/file/tip/d1"> <img src="/static/coal-folder.png" alt="dir."/> d1/ </a> <a href="/file/tip/d1/d2"> d2 </a> </td> <td class="size"></td> <td class="permissions">drwxr-xr-x</td> </tr> </tbody> </table> </div> </div> </body> </html> manifest with descending (coal) $ get-with-headers.py $LOCALIP:$HGPORT 'file?style=coal' 200 Script output follows <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US"> <head> <link rel="icon" href="/static/hgicon.png" type="image/png" /> <meta name="robots" content="index, nofollow" /> <link rel="stylesheet" href="/static/style-paper.css" type="text/css" /> <link rel="stylesheet" href="/static/style-extra-coal.css" type="text/css" /> <script type="text/javascript" src="/static/mercurial.js"></script> <title>test: c9f45f7a1659 /</title> </head> <body> <div class="container"> <div class="menu"> <div class="logo"> <a href="https://mercurial-scm.org/"> <img src="/static/hglogo.png" alt="mercurial" /></a> </div> <ul> <li><a href="/shortlog/tip?style=coal">log</a></li> <li><a href="/graph/tip?style=coal">graph</a></li> <li><a href="/tags?style=coal">tags</a></li> <li><a href="/bookmarks?style=coal">bookmarks</a></li> <li><a href="/branches?style=coal">branches</a></li> </ul> <ul> <li><a href="/rev/tip?style=coal">changeset</a></li> <li class="active">browse</li> </ul> <ul> </ul> <ul> <li><a href="/help?style=coal">help</a></li> </ul> </div> <div class="main"> <h2 class="breadcrumb"><a href="/">Mercurial</a> </h2> <h3> directory / @ 0:<a href="/rev/c9f45f7a1659?style=coal">c9f45f7a1659</a> <span class="phase">draft</span> <span class="branchhead">default</span> <span class="tag">tip</span> </h3> <form class="search" action="/log"> <input type="hidden" name="style" value="coal" /> <p><input name="rev" id="search1" type="text" size="30" value="" /></p> <div id="hint">Find changesets by keywords (author, files, the commit message), revision number or hash, or <a href="/help/revsets">revset expression</a>.</div> </form> <table class="bigtable"> <thead> <tr> <th class="name">name</th> <th class="size">size</th> <th class="permissions">permissions</th> </tr> </thead> <tbody class="stripes2"> <tr class="fileline"> <td class="name"> <a href="/file/tip/a1?style=coal"> <img src="/static/coal-folder.png" alt="dir."/> a1/ </a> <a href="/file/tip/a1/a2/a3/a4?style=coal"> a2/a3/a4 </a> </td> <td class="size"></td> <td class="permissions">drwxr-xr-x</td> </tr> <tr class="fileline"> <td class="name"> <a href="/file/tip/b1?style=coal"> <img src="/static/coal-folder.png" alt="dir."/> b1/ </a> <a href="/file/tip/b1/b2/b3?style=coal"> b2/b3 </a> </td> <td class="size"></td> <td class="permissions">drwxr-xr-x</td> </tr> <tr class="fileline"> <td class="name"> <a href="/file/tip/d1?style=coal"> <img src="/static/coal-folder.png" alt="dir."/> d1/ </a> <a href="/file/tip/d1/d2?style=coal"> d2 </a> </td> <td class="size"></td> <td class="permissions">drwxr-xr-x</td> </tr> </tbody> </table> </div> </div> </body> </html> manifest with descending (monoblue) $ get-with-headers.py $LOCALIP:$HGPORT 'file?style=monoblue' 200 Script output follows <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <link rel="icon" href="/static/hgicon.png" type="image/png" /> <meta name="robots" content="index, nofollow"/> <link rel="stylesheet" href="/static/style-monoblue.css" type="text/css" /> <script type="text/javascript" src="/static/mercurial.js"></script> <title>test: files</title> <link rel="alternate" type="application/atom+xml" href="/atom-log" title="Atom feed for test"/> <link rel="alternate" type="application/rss+xml" href="/rss-log" title="RSS feed for test"/> </head> <body> <div id="container"> <div class="page-header"> <h1 class="breadcrumb"><a href="/">Mercurial</a> / files</h1> <form action="/log"> <input type="hidden" name="style" value="monoblue" /> <dl class="search"> <dt><label>Search: </label></dt> <dd><input type="text" name="rev" value="" /></dd> </dl> </form> <ul class="page-nav"> <li><a href="/summary?style=monoblue">summary</a></li> <li><a href="/shortlog?style=monoblue">shortlog</a></li> <li><a href="/changelog?style=monoblue">changelog</a></li> <li><a href="/graph/tip?style=monoblue">graph</a></li> <li><a href="/tags?style=monoblue">tags</a></li> <li><a href="/bookmarks?style=monoblue">bookmarks</a></li> <li><a href="/branches?style=monoblue">branches</a></li> <li class="current">files</li> <li><a href="/help?style=monoblue">help</a></li> </ul> </div> <ul class="submenu"> <li><a href="/rev/tip?style=monoblue">changeset</a></li> </ul> <h2 class="no-link no-border">files</h2> <p class="files">/ <span class="logtags"><span class="phasetag" title="draft">draft</span> <span class="branchtag" title="default">default</span> <span class="tagtag" title="tip">tip</span> </span></p> <table> <tr class="parity1"> <td>drwxr-xr-x</td> <td></td> <td></td> <td> <a href="/file/tip/a1?style=monoblue">a1</a> <a href="/file/tip/a1/a2/a3/a4?style=monoblue">a2/a3/a4</a> </td> <td><a href="/file/tip/a1?style=monoblue">files</a></td> </tr> <tr class="parity0"> <td>drwxr-xr-x</td> <td></td> <td></td> <td> <a href="/file/tip/b1?style=monoblue">b1</a> <a href="/file/tip/b1/b2/b3?style=monoblue">b2/b3</a> </td> <td><a href="/file/tip/b1?style=monoblue">files</a></td> </tr> <tr class="parity1"> <td>drwxr-xr-x</td> <td></td> <td></td> <td> <a href="/file/tip/d1?style=monoblue">d1</a> <a href="/file/tip/d1/d2?style=monoblue">d2</a> </td> <td><a href="/file/tip/d1?style=monoblue">files</a></td> </tr> </table> <div class="page-footer"> <p>Mercurial Repository: test</p> <ul class="rss-logo"> <li><a href="/rss-log">RSS</a></li> <li><a href="/atom-log">Atom</a></li> </ul> </div> <div id="powered-by"> <p><a href="https://mercurial-scm.org/" title="Mercurial"><img src="/static/hglogo.png" width=75 height=90 border=0 alt="mercurial" /></a></p> </div> </div> </body> </html> manifest with descending (gitweb) $ get-with-headers.py $LOCALIP:$HGPORT 'file?style=gitweb' 200 Script output follows <?xml version="1.0" encoding="ascii"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US"> <head> <link rel="icon" href="/static/hgicon.png" type="image/png" /> <meta name="robots" content="index, nofollow"/> <link rel="stylesheet" href="/static/style-gitweb.css" type="text/css" /> <script type="text/javascript" src="/static/mercurial.js"></script> <title>test: files</title> <link rel="alternate" type="application/atom+xml" href="/atom-log" title="Atom feed for test"/> <link rel="alternate" type="application/rss+xml" href="/rss-log" title="RSS feed for test"/> </head> <body> <div class="page_header"> <a href="https://mercurial-scm.org/" title="Mercurial" style="float: right;">Mercurial</a> <a href="/">Mercurial</a> / files </div> <div class="page_nav"> <div> <a href="/summary?style=gitweb">summary</a> | <a href="/shortlog?style=gitweb">shortlog</a> | <a href="/log?style=gitweb">changelog</a> | <a href="/graph?style=gitweb">graph</a> | <a href="/tags?style=gitweb">tags</a> | <a href="/bookmarks?style=gitweb">bookmarks</a> | <a href="/branches?style=gitweb">branches</a> | files | <a href="/rev/tip?style=gitweb">changeset</a> | <a href="/help?style=gitweb">help</a> </div> <div class="search"> <form id="searchform" action="/log"> <input type="hidden" name="style" value="gitweb" /> <input name="rev" type="text" value="" size="40" /> <div id="hint">Find changesets by keywords (author, files, the commit message), revision number or hash, or <a href="/help/revsets">revset expression</a>.</div> </form> </div> </div> <div class="title">/ <span class="logtags"><span class="phasetag" title="draft">draft</span> <span class="branchtag" title="default">default</span> <span class="tagtag" title="tip">tip</span> </span></div> <table cellspacing="0"> <tr class="parity1"> <td style="font-family:monospace">drwxr-xr-x</td> <td style="font-family:monospace"></td> <td style="font-family:monospace"></td> <td> <a href="/file/tip/a1?style=gitweb">a1</a> <a href="/file/tip/a1/a2/a3/a4?style=gitweb">a2/a3/a4</a> </td> <td class="link"> <a href="/file/tip/a1?style=gitweb">files</a> </td> </tr> <tr class="parity0"> <td style="font-family:monospace">drwxr-xr-x</td> <td style="font-family:monospace"></td> <td style="font-family:monospace"></td> <td> <a href="/file/tip/b1?style=gitweb">b1</a> <a href="/file/tip/b1/b2/b3?style=gitweb">b2/b3</a> </td> <td class="link"> <a href="/file/tip/b1?style=gitweb">files</a> </td> </tr> <tr class="parity1"> <td style="font-family:monospace">drwxr-xr-x</td> <td style="font-family:monospace"></td> <td style="font-family:monospace"></td> <td> <a href="/file/tip/d1?style=gitweb">d1</a> <a href="/file/tip/d1/d2?style=gitweb">d2</a> </td> <td class="link"> <a href="/file/tip/d1?style=gitweb">files</a> </td> </tr> </table> <div class="page_footer"> <div class="page_footer_text">test</div> <div class="rss_logo"> <a href="/rss-log">RSS</a> <a href="/atom-log">Atom</a> </div> <br /> </div> </body> </html> manifest with descending (spartan) $ get-with-headers.py $LOCALIP:$HGPORT 'file?style=spartan' 200 Script output follows <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <link rel="icon" href="/static/hgicon.png" type="image/png"> <meta name="robots" content="index, nofollow" /> <link rel="stylesheet" href="/static/style.css" type="text/css" /> <script type="text/javascript" src="/static/mercurial.js"></script> <title>test: files for changeset c9f45f7a1659</title> </head> <body> <div class="buttons"> <a href="/log/tip?style=spartan">changelog</a> <a href="/shortlog/tip?style=spartan">shortlog</a> <a href="/graph/tip?style=spartan">graph</a> <a href="/tags?style=spartan">tags</a> <a href="/branches?style=spartan">branches</a> <a href="/rev/tip?style=spartan">changeset</a> <a href="/help?style=spartan">help</a> </div> <h2><a href="/">Mercurial</a> / files for changeset <a href="/rev/c9f45f7a1659">c9f45f7a1659</a>: /</h2> <table cellpadding="0" cellspacing="0"> <tr class="parity1"> <td><tt>drwxr-xr-x</tt> </td> <td> </td> <td> </td> <td> <a href="/file/tip/a1?style=spartan">a1/</a> <a href="/file/tip/a1/a2/a3/a4?style=spartan"> a2/a3/a4 </a> </td> </tr> <tr class="parity0"> <td><tt>drwxr-xr-x</tt> </td> <td> </td> <td> </td> <td> <a href="/file/tip/b1?style=spartan">b1/</a> <a href="/file/tip/b1/b2/b3?style=spartan"> b2/b3 </a> </td> </tr> <tr class="parity1"> <td><tt>drwxr-xr-x</tt> </td> <td> </td> <td> </td> <td> <a href="/file/tip/d1?style=spartan">d1/</a> <a href="/file/tip/d1/d2?style=spartan"> d2 </a> </td> </tr> </table> <div class="logo"> <a href="https://mercurial-scm.org/"> <img src="/static/hglogo.png" width=75 height=90 border=0 alt="mercurial"></a> </div> </body> </html> $ cat errors.log $ cd ..