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<channel>
    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
    </build-info>


<item>
            <title>[SERVER-6572] Performance issue</title>
                <link>https://jira.mongodb.org/browse/SERVER-6572</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;A read/write test shows significant performance degradation between 2.0 and 2.2&lt;/p&gt;</description>
                <environment></environment>
        <key id="45224">SERVER-6572</key>
            <summary>Performance issue</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="9">Done</resolution>
                                        <assignee username="eliot">Eliot Horowitz</assignee>
                                    <reporter username="milkie@mongodb.com">Eric Milkie</reporter>
                        <labels>
                    </labels>
                <created>Tue, 24 Jul 2012 14:16:08 +0000</created>
                <updated>Mon, 11 Jul 2016 17:58:29 +0000</updated>
                            <resolved>Tue, 14 Aug 2012 05:20:41 +0000</resolved>
                                    <version>2.2.0-rc0</version>
                                    <fixVersion>2.2.0-rc1</fixVersion>
                                    <component>Performance</component>
                                        <votes>4</votes>
                                    <watches>12</watches>
                                                                                                                <comments>
                            <comment id="151851" author="auto" created="Thu, 9 Aug 2012 05:42:24 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-08-08T22:41:59-07:00&apos;, u&apos;email&apos;: u&apos;eliot@10gen.com&apos;, u&apos;name&apos;: u&apos;Eliot Horowitz&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-6572&quot; title=&quot;Performance issue&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-6572&quot;&gt;&lt;del&gt;SERVER-6572&lt;/del&gt;&lt;/a&gt; - use pthread specifics on os x for performance&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/78de2819dca377af2e4c26b1160832336a573126&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/78de2819dca377af2e4c26b1160832336a573126&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="151829" author="auto" created="Thu, 9 Aug 2012 01:38:08 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-08-08T18:22:29-07:00&apos;, u&apos;email&apos;: u&apos;tad@10gen.com&apos;, u&apos;name&apos;: u&apos;Tad Marshall&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-6572&quot; title=&quot;Performance issue&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-6572&quot;&gt;&lt;del&gt;SERVER-6572&lt;/del&gt;&lt;/a&gt; fix Windows warning&lt;/p&gt;

&lt;p&gt;Explicitly make the target of the bit shift &apos;long long&apos; to avoid&lt;br/&gt;
MSVC warning: &quot;src\mongo\db\record.cpp(242) : warning C4334:&lt;br/&gt;
&apos;&amp;lt;&amp;lt;&apos; : result of 32-bit shift implicitly converted to 64 bits&lt;br/&gt;
(was 64-bit shift intended?)&quot;.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/4e7a01cb208120a7ff956d8ae7d37b8c00a36c71&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/4e7a01cb208120a7ff956d8ae7d37b8c00a36c71&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="151785" author="auto" created="Wed, 8 Aug 2012 22:30:28 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-08-08T15:34:03-07:00&apos;, u&apos;email&apos;: u&apos;eliot@10gen.com&apos;, u&apos;name&apos;: u&apos;Eliot Horowitz&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-6572&quot; title=&quot;Performance issue&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-6572&quot;&gt;&lt;del&gt;SERVER-6572&lt;/del&gt;&lt;/a&gt; - fix windows&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/f69d15b42a46326aabc436077c047adfa6fa6061&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/f69d15b42a46326aabc436077c047adfa6fa6061&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="151783" author="auto" created="Wed, 8 Aug 2012 22:26:12 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-08-08T15:29:47-07:00&apos;, u&apos;email&apos;: u&apos;eliot@10gen.com&apos;, u&apos;name&apos;: u&apos;Eliot Horowitz&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-6572&quot; title=&quot;Performance issue&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-6572&quot;&gt;&lt;del&gt;SERVER-6572&lt;/del&gt;&lt;/a&gt; - can&apos;t use enum on windows&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/a3dd87187cc8788788dc1fe51b71acdfc18b1ffe&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/a3dd87187cc8788788dc1fe51b71acdfc18b1ffe&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="151769" author="auto" created="Wed, 8 Aug 2012 21:56:36 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-08-08T14:56:33-07:00&apos;, u&apos;email&apos;: u&apos;eliot@10gen.com&apos;, u&apos;name&apos;: u&apos;Eliot Horowitz&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-6572&quot; title=&quot;Performance issue&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-6572&quot;&gt;&lt;del&gt;SERVER-6572&lt;/del&gt;&lt;/a&gt; - don&apos;t use a class so we can use simple thread locals&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/e09439b53ea25f7df38b06c159e78d97e0e9f310&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/e09439b53ea25f7df38b06c159e78d97e0e9f310&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="151743" author="auto" created="Wed, 8 Aug 2012 20:57:04 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-08-08T13:59:44-07:00&apos;, u&apos;email&apos;: u&apos;eliot@10gen.com&apos;, u&apos;name&apos;: u&apos;Eliot Horowitz&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-6572&quot; title=&quot;Performance issue&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-6572&quot;&gt;&lt;del&gt;SERVER-6572&lt;/del&gt;&lt;/a&gt; use a thread local cache for better perforamnce in record caching&lt;br/&gt;
   needs work on os x&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/368c55d0f63a2914ec6c0b6cd30fdaafd1b01090&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/368c55d0f63a2914ec6c0b6cd30fdaafd1b01090&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="151739" author="auto" created="Wed, 8 Aug 2012 20:52:22 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-08-08T13:50:56-07:00&apos;, u&apos;email&apos;: u&apos;schwerin@10gen.com&apos;, u&apos;name&apos;: u&apos;Andy Schwerin&apos;}
&lt;p&gt;Message: Revert &quot;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-6572&quot; title=&quot;Performance issue&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-6572&quot;&gt;&lt;del&gt;SERVER-6572&lt;/del&gt;&lt;/a&gt; use a thread local cache for better perforamnce in record caching&quot;&lt;/p&gt;

&lt;p&gt;This reverts commit f7fdee2e22b37c20a2999fe579111f0fb1f5eb91.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/e6d8466bc18b4b6c686a745276e745b69abc6ebd&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/e6d8466bc18b4b6c686a745276e745b69abc6ebd&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="151732" author="auto" created="Wed, 8 Aug 2012 20:44:09 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-08-08T13:47:24-07:00&apos;, u&apos;email&apos;: u&apos;eliot@10gen.com&apos;, u&apos;name&apos;: u&apos;Eliot Horowitz&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-6572&quot; title=&quot;Performance issue&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-6572&quot;&gt;&lt;del&gt;SERVER-6572&lt;/del&gt;&lt;/a&gt; use a thread local cache for better perforamnce in record caching&lt;br/&gt;
            needs work on osx&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/f7fdee2e22b37c20a2999fe579111f0fb1f5eb91&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/f7fdee2e22b37c20a2999fe579111f0fb1f5eb91&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="150468" author="benjamin.becker" created="Fri, 3 Aug 2012 20:19:25 +0000"  >&lt;p&gt;The biggest discrepancy between v2.0 and v2.2 appears to be due to the MemoryTracking code.  This is most evident when querying for large result sets.  The worst-case test I came up with was simply querying for 200,000 small documents.&lt;/p&gt;

&lt;h5&gt;&lt;a name=&quot;Dataset&quot;&gt;&lt;/a&gt;Dataset&lt;/h5&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&amp;gt; db.x.find()&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;{ &quot;_id&quot; : ObjectId(&quot;501c0b0573a6ea925a901c26&quot;), &quot;a&quot; : 0 }&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;{ &quot;_id&quot; : ObjectId(&quot;501c0b0573a6ea925a901c27&quot;), &quot;a&quot; : 1 }&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;...&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&amp;gt; db.x.count()&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;200000&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;h5&gt;&lt;a name=&quot;Tests&quot;&gt;&lt;/a&gt;Tests&lt;/h5&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&amp;gt; benchRun( { ops : [{ns:&apos;test.x&apos;, op:&apos;find&apos;, query:{a:{$gte:1}}}] , host : &apos;localhost&apos; , db : &apos;test&apos; , parallel : 2 , seconds : 30 } )&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&amp;gt; benchRun( { ops : [{ns:&apos;test.x&apos;, op:&apos;find&apos;, query:{a:{$gte:1}}}] , host : &apos;localhost&apos; , db : &apos;test&apos; , parallel : 1 , seconds : 30 } )&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;h5&gt;&lt;a name=&quot;Results&quot;&gt;&lt;/a&gt;Results&lt;/h5&gt;
&lt;div class=&apos;table-wrap&apos;&gt;
&lt;table class=&apos;confluenceTable&apos;&gt;&lt;tbody&gt;
&lt;tr&gt;
&lt;th class=&apos;confluenceTh&apos;&gt;Threads  &lt;/th&gt;
&lt;th class=&apos;confluenceTh&apos;&gt;v2.0        &lt;/th&gt;
&lt;th class=&apos;confluenceTh&apos;&gt;v2.2-rc1-pre     &lt;/th&gt;
&lt;th class=&apos;confluenceTh&apos;&gt;v2.2-rc1-pre (No MemTracking*)&lt;/th&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;1          &lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;12q/s, 24gm/s&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;8q/s, 16gm/s      &lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;11q/s, 22gm/s &lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;2          &lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;21q/s, 42gm/s&lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;13q/s, 26gm/s     &lt;/td&gt;
&lt;td class=&apos;confluenceTd&apos;&gt;21q/s, 41gm/s &lt;/td&gt;
&lt;/tr&gt;
&lt;/tbody&gt;&lt;/table&gt;
&lt;/div&gt;


&lt;p&gt;*No MemTracking simply means:&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;-    bool Record::MemoryTrackingEnabled = true;&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;+    bool Record::MemoryTrackingEnabled = false;&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;h5&gt;&lt;a name=&quot;ProfilerResults&quot;&gt;&lt;/a&gt;Profiler Results&lt;/h5&gt;
&lt;p&gt;Perftools has been troublesome due to libunwind/pthread, so these results were taken from sysprof.  The default build of v2.2-rc1-pre indicated the following notable call times:&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;mongo::ps::Rolling::access():            6.9% CPU&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;mongo::ps::hash():                       5.15% CPU&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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			&lt;/td&gt;
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&lt;p/&gt;

&lt;h5&gt;&lt;a name=&quot;FinalNotes&quot;&gt;&lt;/a&gt;Final Notes&lt;/h5&gt;
&lt;p&gt;The DEV block in likelyInPhysicalMemory() really throws things off.  I think we should get rid.&lt;/p&gt;
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