store: implement fncache basic path encoding in C
(This is not yet enabled; it will be turned on in a followup patch.)
The path encoding performed by fncache is complex and (perhaps
surprisingly) slow enough to negatively affect the overall performance
of Mercurial.
For a short path (< 120 bytes), the Python code can be reduced to a fairly
tractable state machine that either determines that nothing needs to be
done in a single pass, or performs the encoding in a second pass.
For longer paths, we avoid the more complicated hashed encoding scheme
for now, and fall back to Python.
Raw performance: I measured in a repo containing 150,000 files in its tip
manifest, with a median path name length of 57 bytes, and 95th percentile
of 96 bytes.
In this repo, the Python code takes 3.1 seconds to encode all path
names, while the hybrid C-and-Python code (called from Python) takes
0.21 seconds, for a speedup of about 14.
Across several other large repositories, I've measured the speedup from
the C code at between 26x and 40x.
For path names above 120 bytes where we must fall back to Python for
hashed encoding, the speedup is about 1.7x. Thus absolute performance
will depend strongly on the characteristics of a particular repository.
$ "$TESTDIR/hghave" serve || exit 80
$ hg init test
$ cd test
$ echo b > b
$ hg ci -Am "b"
adding b
$ echo a > a
$ hg ci -Am "first a"
adding a
$ hg rm a
$ hg ci -m "del a"
$ echo b > a
$ hg ci -Am "second a"
adding a
$ hg rm a
$ hg ci -m "del2 a"
$ hg mv b c
$ hg ci -m "mv b"
$ echo c >> c
$ hg ci -m "change c"
$ hg log -p
changeset: 6:b7682196df1c
tag: tip
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: change c
diff -r 1a6696706df2 -r b7682196df1c c
--- a/c Thu Jan 01 00:00:00 1970 +0000
+++ b/c Thu Jan 01 00:00:00 1970 +0000
@@ -1,1 +1,2 @@
b
+c
changeset: 5:1a6696706df2
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: mv b
diff -r 52e848cdcd88 -r 1a6696706df2 b
--- a/b Thu Jan 01 00:00:00 1970 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,1 +0,0 @@
-b
diff -r 52e848cdcd88 -r 1a6696706df2 c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/c Thu Jan 01 00:00:00 1970 +0000
@@ -0,0 +1,1 @@
+b
changeset: 4:52e848cdcd88
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: del2 a
diff -r 01de2d66a28d -r 52e848cdcd88 a
--- a/a Thu Jan 01 00:00:00 1970 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,1 +0,0 @@
-b
changeset: 3:01de2d66a28d
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: second a
diff -r be3ebcc91739 -r 01de2d66a28d a
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/a Thu Jan 01 00:00:00 1970 +0000
@@ -0,0 +1,1 @@
+b
changeset: 2:be3ebcc91739
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: del a
diff -r 5ed941583260 -r be3ebcc91739 a
--- a/a Thu Jan 01 00:00:00 1970 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,1 +0,0 @@
-a
changeset: 1:5ed941583260
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: first a
diff -r 6563da9dcf87 -r 5ed941583260 a
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/a Thu Jan 01 00:00:00 1970 +0000
@@ -0,0 +1,1 @@
+a
changeset: 0:6563da9dcf87
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: b
diff -r 000000000000 -r 6563da9dcf87 b
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/b Thu Jan 01 00:00:00 1970 +0000
@@ -0,0 +1,1 @@
+b
$ hg serve -n test -p $HGPORT -d --pid-file=hg.pid -E errors.log
$ cat hg.pid >> $DAEMON_PIDS
tip - two revisions
$ ("$TESTDIR/get-with-headers.py" localhost:$HGPORT 'log/tip/a')
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: a history</title>
<link rel="alternate" type="application/atom+xml"
href="/atom-log/tip/a" title="Atom feed for test:a" />
<link rel="alternate" type="application/rss+xml"
href="/rss-log/tip/a" title="RSS feed for test:a" />
</head>
<body>
<div class="container">
<div class="menu">
<div class="logo">
<a href="http://mercurial.selenic.com/">
<img src="/static/hglogo.png" alt="mercurial" /></a>
</div>
<ul>
<li><a href="/shortlog/01de2d66a28d">log</a></li>
<li><a href="/graph/01de2d66a28d">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/01de2d66a28d">changeset</a></li>
<li><a href="/file/01de2d66a28d">browse</a></li>
</ul>
<ul>
<li><a href="/file/01de2d66a28d/a">file</a></li>
<li><a href="/diff/01de2d66a28d/a">diff</a></li>
<li><a href="/comparison/01de2d66a28d/a">comparison</a></li>
<li><a href="/annotate/01de2d66a28d/a">annotate</a></li>
<li class="active">file log</li>
<li><a href="/raw-file/01de2d66a28d/a">raw</a></li>
</ul>
<ul>
<li><a href="/help">help</a></li>
</ul>
</div>
<div class="main">
<h2><a href="/">test</a></h2>
<h3>log a</h3>
<form class="search" action="/log">
<p><input name="rev" id="search1" type="text" size="30" /></p>
<div id="hint">find changesets by author, revision,
files, or words in the commit message</div>
</form>
<div class="navigate">
<a href="/log/01de2d66a28d/a?revcount=30">less</a>
<a href="/log/01de2d66a28d/a?revcount=120">more</a>
| <a href="/log/5ed941583260/a">(0)</a> <a href="/log/tip/a">tip</a> </div>
<table class="bigtable">
<tr>
<th class="age">age</th>
<th class="author">author</th>
<th class="description">description</th>
</tr>
<tr class="parity0">
<td class="age">Thu, 01 Jan 1970 00:00:00 +0000</td>
<td class="author">test</td>
<td class="description"><a href="/rev/01de2d66a28d">second a</a></td>
</tr>
<tr class="parity1">
<td class="age">Thu, 01 Jan 1970 00:00:00 +0000</td>
<td class="author">test</td>
<td class="description"><a href="/rev/5ed941583260">first a</a></td>
</tr>
</table>
<div class="navigate">
<a href="/log/01de2d66a28d/a?revcount=30">less</a>
<a href="/log/01de2d66a28d/a?revcount=120">more</a>
| <a href="/log/5ed941583260/a">(0)</a> <a href="/log/tip/a">tip</a>
</div>
</div>
</div>
<script type="text/javascript">process_dates()</script>
</body>
</html>
second version - two revisions
$ ("$TESTDIR/get-with-headers.py" localhost:$HGPORT 'log/3/a')
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: a history</title>
<link rel="alternate" type="application/atom+xml"
href="/atom-log/tip/a" title="Atom feed for test:a" />
<link rel="alternate" type="application/rss+xml"
href="/rss-log/tip/a" title="RSS feed for test:a" />
</head>
<body>
<div class="container">
<div class="menu">
<div class="logo">
<a href="http://mercurial.selenic.com/">
<img src="/static/hglogo.png" alt="mercurial" /></a>
</div>
<ul>
<li><a href="/shortlog/01de2d66a28d">log</a></li>
<li><a href="/graph/01de2d66a28d">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/01de2d66a28d">changeset</a></li>
<li><a href="/file/01de2d66a28d">browse</a></li>
</ul>
<ul>
<li><a href="/file/01de2d66a28d/a">file</a></li>
<li><a href="/diff/01de2d66a28d/a">diff</a></li>
<li><a href="/comparison/01de2d66a28d/a">comparison</a></li>
<li><a href="/annotate/01de2d66a28d/a">annotate</a></li>
<li class="active">file log</li>
<li><a href="/raw-file/01de2d66a28d/a">raw</a></li>
</ul>
<ul>
<li><a href="/help">help</a></li>
</ul>
</div>
<div class="main">
<h2><a href="/">test</a></h2>
<h3>log a</h3>
<form class="search" action="/log">
<p><input name="rev" id="search1" type="text" size="30" /></p>
<div id="hint">find changesets by author, revision,
files, or words in the commit message</div>
</form>
<div class="navigate">
<a href="/log/01de2d66a28d/a?revcount=30">less</a>
<a href="/log/01de2d66a28d/a?revcount=120">more</a>
| <a href="/log/5ed941583260/a">(0)</a> <a href="/log/tip/a">tip</a> </div>
<table class="bigtable">
<tr>
<th class="age">age</th>
<th class="author">author</th>
<th class="description">description</th>
</tr>
<tr class="parity0">
<td class="age">Thu, 01 Jan 1970 00:00:00 +0000</td>
<td class="author">test</td>
<td class="description"><a href="/rev/01de2d66a28d">second a</a></td>
</tr>
<tr class="parity1">
<td class="age">Thu, 01 Jan 1970 00:00:00 +0000</td>
<td class="author">test</td>
<td class="description"><a href="/rev/5ed941583260">first a</a></td>
</tr>
</table>
<div class="navigate">
<a href="/log/01de2d66a28d/a?revcount=30">less</a>
<a href="/log/01de2d66a28d/a?revcount=120">more</a>
| <a href="/log/5ed941583260/a">(0)</a> <a href="/log/tip/a">tip</a>
</div>
</div>
</div>
<script type="text/javascript">process_dates()</script>
</body>
</html>
first deleted - one revision
$ ("$TESTDIR/get-with-headers.py" localhost:$HGPORT 'log/2/a')
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: a history</title>
<link rel="alternate" type="application/atom+xml"
href="/atom-log/tip/a" title="Atom feed for test:a" />
<link rel="alternate" type="application/rss+xml"
href="/rss-log/tip/a" title="RSS feed for test:a" />
</head>
<body>
<div class="container">
<div class="menu">
<div class="logo">
<a href="http://mercurial.selenic.com/">
<img src="/static/hglogo.png" alt="mercurial" /></a>
</div>
<ul>
<li><a href="/shortlog/5ed941583260">log</a></li>
<li><a href="/graph/5ed941583260">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/5ed941583260">changeset</a></li>
<li><a href="/file/5ed941583260">browse</a></li>
</ul>
<ul>
<li><a href="/file/5ed941583260/a">file</a></li>
<li><a href="/diff/5ed941583260/a">diff</a></li>
<li><a href="/comparison/5ed941583260/a">comparison</a></li>
<li><a href="/annotate/5ed941583260/a">annotate</a></li>
<li class="active">file log</li>
<li><a href="/raw-file/5ed941583260/a">raw</a></li>
</ul>
<ul>
<li><a href="/help">help</a></li>
</ul>
</div>
<div class="main">
<h2><a href="/">test</a></h2>
<h3>log a</h3>
<form class="search" action="/log">
<p><input name="rev" id="search1" type="text" size="30" /></p>
<div id="hint">find changesets by author, revision,
files, or words in the commit message</div>
</form>
<div class="navigate">
<a href="/log/5ed941583260/a?revcount=30">less</a>
<a href="/log/5ed941583260/a?revcount=120">more</a>
| <a href="/log/5ed941583260/a">(0)</a> <a href="/log/tip/a">tip</a> </div>
<table class="bigtable">
<tr>
<th class="age">age</th>
<th class="author">author</th>
<th class="description">description</th>
</tr>
<tr class="parity0">
<td class="age">Thu, 01 Jan 1970 00:00:00 +0000</td>
<td class="author">test</td>
<td class="description"><a href="/rev/5ed941583260">first a</a></td>
</tr>
</table>
<div class="navigate">
<a href="/log/5ed941583260/a?revcount=30">less</a>
<a href="/log/5ed941583260/a?revcount=120">more</a>
| <a href="/log/5ed941583260/a">(0)</a> <a href="/log/tip/a">tip</a>
</div>
</div>
</div>
<script type="text/javascript">process_dates()</script>
</body>
</html>
first version - one revision
$ ("$TESTDIR/get-with-headers.py" localhost:$HGPORT 'log/1/a')
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: a history</title>
<link rel="alternate" type="application/atom+xml"
href="/atom-log/tip/a" title="Atom feed for test:a" />
<link rel="alternate" type="application/rss+xml"
href="/rss-log/tip/a" title="RSS feed for test:a" />
</head>
<body>
<div class="container">
<div class="menu">
<div class="logo">
<a href="http://mercurial.selenic.com/">
<img src="/static/hglogo.png" alt="mercurial" /></a>
</div>
<ul>
<li><a href="/shortlog/5ed941583260">log</a></li>
<li><a href="/graph/5ed941583260">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/5ed941583260">changeset</a></li>
<li><a href="/file/5ed941583260">browse</a></li>
</ul>
<ul>
<li><a href="/file/5ed941583260/a">file</a></li>
<li><a href="/diff/5ed941583260/a">diff</a></li>
<li><a href="/comparison/5ed941583260/a">comparison</a></li>
<li><a href="/annotate/5ed941583260/a">annotate</a></li>
<li class="active">file log</li>
<li><a href="/raw-file/5ed941583260/a">raw</a></li>
</ul>
<ul>
<li><a href="/help">help</a></li>
</ul>
</div>
<div class="main">
<h2><a href="/">test</a></h2>
<h3>log a</h3>
<form class="search" action="/log">
<p><input name="rev" id="search1" type="text" size="30" /></p>
<div id="hint">find changesets by author, revision,
files, or words in the commit message</div>
</form>
<div class="navigate">
<a href="/log/5ed941583260/a?revcount=30">less</a>
<a href="/log/5ed941583260/a?revcount=120">more</a>
| <a href="/log/5ed941583260/a">(0)</a> <a href="/log/tip/a">tip</a> </div>
<table class="bigtable">
<tr>
<th class="age">age</th>
<th class="author">author</th>
<th class="description">description</th>
</tr>
<tr class="parity0">
<td class="age">Thu, 01 Jan 1970 00:00:00 +0000</td>
<td class="author">test</td>
<td class="description"><a href="/rev/5ed941583260">first a</a></td>
</tr>
</table>
<div class="navigate">
<a href="/log/5ed941583260/a?revcount=30">less</a>
<a href="/log/5ed941583260/a?revcount=120">more</a>
| <a href="/log/5ed941583260/a">(0)</a> <a href="/log/tip/a">tip</a>
</div>
</div>
</div>
<script type="text/javascript">process_dates()</script>
</body>
</html>
before addition - error
$ ("$TESTDIR/get-with-headers.py" localhost:$HGPORT 'log/0/a')
404 Not Found
<!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: error</title>
</head>
<body>
<div class="container">
<div class="menu">
<div class="logo">
<a href="http://mercurial.selenic.com/">
<img src="/static/hglogo.png" width=75 height=90 border=0 alt="mercurial" /></a>
</div>
<ul>
<li><a href="/shortlog">log</a></li>
<li><a href="/graph">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="/help">help</a></li>
</ul>
</div>
<div class="main">
<h2><a href="/">test</a></h2>
<h3>error</h3>
<form class="search" action="/log">
<p><input name="rev" id="search1" type="text" size="30"></p>
<div id="hint">find changesets by author, revision,
files, or words in the commit message</div>
</form>
<div class="description">
<p>
An error occurred while processing your request:
</p>
<p>
a@6563da9dcf87: not found in manifest
</p>
</div>
</div>
</div>
<script type="text/javascript">process_dates()</script>
</body>
</html>
[1]
should show base link, use spartan because it shows it
$ ("$TESTDIR/get-with-headers.py" localhost:$HGPORT 'log/tip/c?style=spartan')
200 Script output follows
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<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: c history</title>
<link rel="alternate" type="application/atom+xml"
href="/atom-log/tip/c" title="Atom feed for test:c">
<link rel="alternate" type="application/rss+xml"
href="/rss-log/tip/c" title="RSS feed for test:c">
</head>
<body>
<div class="buttons">
<a href="/log?style=spartan">changelog</a>
<a href="/shortlog?style=spartan">shortlog</a>
<a href="/graph?style=spartan">graph</a>
<a href="/tags?style=spartan">tags</a>
<a href="/branches?style=spartan">branches</a>
<a href="/file/b7682196df1c/c?style=spartan">file</a>
<a href="/annotate/b7682196df1c/c?style=spartan">annotate</a>
<a href="/help?style=spartan">help</a>
<a type="application/rss+xml" href="/rss-log/tip/c">rss</a>
<a type="application/atom+xml" href="/atom-log/tip/c" title="Atom feed for test:c">atom</a>
</div>
<h2>c revision history</h2>
<p>navigate: <small class="navigate"><a href="/log/1a6696706df2/c?style=spartan">(0)</a> <a href="/log/tip/c?style=spartan">tip</a> </small></p>
<table class="logEntry parity0">
<tr>
<th><span class="age">Thu, 01 Jan 1970 00:00:00 +0000</span>:</th>
<th class="firstline"><a href="/rev/b7682196df1c?style=spartan">change c</a></th>
</tr>
<tr>
<th class="revision">revision 1:</td>
<td class="node">
<a href="/file/b7682196df1c/c?style=spartan">b7682196df1c</a>
<a href="/diff/b7682196df1c/c?style=spartan">(diff)</a>
<a href="/annotate/b7682196df1c/c?style=spartan">(annotate)</a>
</td>
</tr>
<tr>
<th class="author">author:</th>
<td class="author">test</td>
</tr>
<tr>
<th class="date">date:</th>
<td class="date">Thu, 01 Jan 1970 00:00:00 +0000</td>
</tr>
</table>
<table class="logEntry parity1">
<tr>
<th><span class="age">Thu, 01 Jan 1970 00:00:00 +0000</span>:</th>
<th class="firstline"><a href="/rev/1a6696706df2?style=spartan">mv b</a></th>
</tr>
<tr>
<th class="revision">revision 0:</td>
<td class="node">
<a href="/file/1a6696706df2/c?style=spartan">1a6696706df2</a>
<a href="/diff/1a6696706df2/c?style=spartan">(diff)</a>
<a href="/annotate/1a6696706df2/c?style=spartan">(annotate)</a>
</td>
</tr>
<tr>
<th>base:</th>
<td>
<a href="/file/1e88685f5dde/b?style=spartan">
b@1e88685f5dde
</a>
</td>
</tr>
<tr>
<th class="author">author:</th>
<td class="author">test</td>
</tr>
<tr>
<th class="date">date:</th>
<td class="date">Thu, 01 Jan 1970 00:00:00 +0000</td>
</tr>
</table>
<script type="text/javascript">process_dates()</script>
<div class="logo">
<a href="http://mercurial.selenic.com/">
<img src="/static/hglogo.png" width=75 height=90 border=0 alt="mercurial"></a>
</div>
</body>
</html>
rss log
$ ("$TESTDIR/get-with-headers.py" localhost:$HGPORT 'rss-log/tip/a')
200 Script output follows
<?xml version="1.0" encoding="ascii"?>
<rss version="2.0">
<channel>
<link>http://*:$HGPORT/</link> (glob)
<language>en-us</language>
<title>test: a history</title>
<description>a revision history</description>
<item>
<title>second a</title>
<link>http://*:$HGPORT/log01de2d66a28d/a</link> (glob)
<description><![CDATA[second a]]></description>
<author>test</author>
<pubDate>Thu, 01 Jan 1970 00:00:00 +0000</pubDate>
</item>
<item>
<title>first a</title>
<link>http://*:$HGPORT/log5ed941583260/a</link> (glob)
<description><![CDATA[first a]]></description>
<author>test</author>
<pubDate>Thu, 01 Jan 1970 00:00:00 +0000</pubDate>
</item>
</channel>
</rss>
atom log
$ ("$TESTDIR/get-with-headers.py" localhost:$HGPORT 'atom-log/tip/a')
200 Script output follows
<?xml version="1.0" encoding="ascii"?>
<feed xmlns="http://www.w3.org/2005/Atom">
<id>http://*:$HGPORT/atom-log/tip/a</id> (glob)
<link rel="self" href="http://*:$HGPORT/atom-log/tip/a"/> (glob)
<title>test: a history</title>
<updated>1970-01-01T00:00:00+00:00</updated>
<entry>
<title>second a</title>
<id>http://*:$HGPORT/#changeset-01de2d66a28df5549090991dccda788726948517</id> (glob)
<link href="http://*:$HGPORT/rev/01de2d66a28d"/> (glob)
<author>
<name>test</name>
<email>test</email>
</author>
<updated>1970-01-01T00:00:00+00:00</updated>
<published>1970-01-01T00:00:00+00:00</published>
<content type="xhtml">
<div xmlns="http://www.w3.org/1999/xhtml">
<pre xml:space="preserve">second a</pre>
</div>
</content>
</entry>
<entry>
<title>first a</title>
<id>http://*:$HGPORT/#changeset-5ed941583260248620985524192fdc382ef57c36</id> (glob)
<link href="http://*:$HGPORT/rev/5ed941583260"/> (glob)
<author>
<name>test</name>
<email>test</email>
</author>
<updated>1970-01-01T00:00:00+00:00</updated>
<published>1970-01-01T00:00:00+00:00</published>
<content type="xhtml">
<div xmlns="http://www.w3.org/1999/xhtml">
<pre xml:space="preserve">first a</pre>
</div>
</content>
</entry>
</feed>
errors
$ cat errors.log
$ cd ..