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    <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>
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<item>
            <title>[SERVER-70040] Revert RecordId performance improvement to use shared buffers</title>
                <link>https://jira.mongodb.org/browse/SERVER-70040</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;With &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-67471&quot; title=&quot;Improve RecordId performance during index build&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-67471&quot;&gt;&lt;del&gt;SERVER-67471&lt;/del&gt;&lt;/a&gt; we made some changes to RecordId in order to fix a regression we detected with our internal performance benchmarks. The fix made was to use unique buffers instead of shared buffers for large record ids as that made the regression go away.&lt;/p&gt;

&lt;p&gt;In &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-68081&quot; title=&quot;Investigate performance regression when using shared buffers in RecordId&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-68081&quot;&gt;&lt;del&gt;SERVER-68081&lt;/del&gt;&lt;/a&gt; we discovered that this regression was only detected in the CPU used in our benchmarks and is not present in current CPUs.&lt;/p&gt;

&lt;p&gt;The purpose of this ticket is to revert the unique buffer and go back to using shared buffers for large record ids.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2146873">SERVER-70040</key>
            <summary>Revert RecordId performance improvement to use shared buffers</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</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="13201">Fixed</resolution>
                                        <assignee username="jordi.olivares-provencio@mongodb.com">Jordi Olivares Provencio</assignee>
                                    <reporter username="jordi.olivares-provencio@mongodb.com">Jordi Olivares Provencio</reporter>
                        <labels>
                    </labels>
                <created>Wed, 28 Sep 2022 10:45:43 +0000</created>
                <updated>Sun, 29 Oct 2023 21:32:44 +0000</updated>
                            <resolved>Fri, 4 Nov 2022 14:48:41 +0000</resolved>
                                                    <fixVersion>6.2.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="4955180" author="xgen-internal-githook" created="Fri, 4 Nov 2022 14:42:51 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Jordi Olivares Provencio&apos;, &apos;email&apos;: &apos;jordi.olivares-provencio@mongodb.com&apos;, &apos;username&apos;: &apos;jordiolivares&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-70040&quot; title=&quot;Revert RecordId performance improvement to use shared buffers&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-70040&quot;&gt;&lt;del&gt;SERVER-70040&lt;/del&gt;&lt;/a&gt; Revert RecordId unique buffer to use shared buffer&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/05427d82a4846dd07e19d9ea772c48111e1d84a5&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/05427d82a4846dd07e19d9ea772c48111e1d84a5&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4876841" author="schwerin" created="Tue, 4 Oct 2022 15:35:27 +0000"  >&lt;p&gt;Ooh, this might be a good opportunity to try to write a simple GDB pretty printer test if the infrastructure is in place. if it isn&apos;t please file a ticket and block it on &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-69843&quot; title=&quot;Make generic PrettyPrinterUnitTest pseudobuilder&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-69843&quot;&gt;&lt;del&gt;SERVER-69843&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</comment>
                            <comment id="4876825" author="louis.williams" created="Tue, 4 Oct 2022 15:33:42 +0000"  >&lt;p&gt;Don&apos;t forget about the GDB pretty-printers&lt;/p&gt;</comment>
                            <comment id="4861254" author="JIRAUSER1264163" created="Wed, 28 Sep 2022 10:47:49 +0000"  >&lt;p&gt;CC &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=schwerin%40mongodb.com&quot; class=&quot;user-hover&quot; rel=&quot;schwerin@mongodb.com&quot;&gt;schwerin@mongodb.com&lt;/a&gt;&lt;/p&gt;</comment>
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