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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-77700] Replace MurmurHash3 with absl::Hash if possible in HashBlock::Hash</title>
                <link>https://jira.mongodb.org/browse/SERVER-77700</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;MurmurHash3 is a pretty old hash function that&apos;s slow and produces low-quality hashes compared to modern alternatives like absl::Hash (CityHash). We want to replace any uses of MurmurHash3 which are for in-memory use only, as we expect this to yield quick perf wins. Hash values that are persisted to disk across restarts or sent across the network between servers are likely unsafe to change, and should be annotated with a clear explanation for why the usage requires a stable hash computation.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2356223">SERVER-77700</key>
            <summary>Replace MurmurHash3 with absl::Hash if possible in HashBlock::Hash</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="mark.benvenuto@mongodb.com">Mark Benvenuto</assignee>
                                    <reporter username="dan.larkin-york@mongodb.com">Dan Larkin-York</reporter>
                        <labels>
                            <label>perf-server-security</label>
                    </labels>
                <created>Thu, 1 Jun 2023 17:56:21 +0000</created>
                <updated>Sun, 29 Oct 2023 21:20:35 +0000</updated>
                            <resolved>Fri, 7 Jul 2023 14:13:43 +0000</resolved>
                                                    <fixVersion>7.1.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="5548174" author="xgen-internal-githook" created="Thu, 6 Jul 2023 17:41:35 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Mark Benvenuto&apos;, &apos;email&apos;: &apos;mark.benvenuto@mongodb.com&apos;, &apos;username&apos;: &apos;markbenvenuto&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-77700&quot; title=&quot;Replace MurmurHash3 with absl::Hash if possible in HashBlock::Hash&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-77700&quot;&gt;&lt;del&gt;SERVER-77700&lt;/del&gt;&lt;/a&gt; Replace MurmurHash3 with absl::Hash if possible in HashBlock::Hash&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/0856acc954f99183854cc151d1fb07b61c4ef7bf&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/0856acc954f99183854cc151d1fb07b61c4ef7bf&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5539553" author="xgen-internal-githook" created="Mon, 3 Jul 2023 00:07:29 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;liubov.molchanova&apos;, &apos;email&apos;: &apos;liubov.molchanova@mongodb.com&apos;, &apos;username&apos;: &apos;liubov-molchanova&apos;}
&lt;p&gt;Message: Revert &quot;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-77700&quot; title=&quot;Replace MurmurHash3 with absl::Hash if possible in HashBlock::Hash&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-77700&quot;&gt;&lt;del&gt;SERVER-77700&lt;/del&gt;&lt;/a&gt; Replace MurmurHash3 with absl::Hash if possible in HashBlock::Hash&quot;&lt;/p&gt;

&lt;p&gt;This reverts commit 0685743d3a2b077a54a4d06f23a9d807ba3efe5c.&lt;br/&gt;
Branch: EVG-17874-taskgen-test&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/9b0bd760d2704daeb1c940be5cfe5801c5e00238&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/9b0bd760d2704daeb1c940be5cfe5801c5e00238&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5539538" author="xgen-internal-githook" created="Mon, 3 Jul 2023 00:06:55 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Mark Benvenuto&apos;, &apos;email&apos;: &apos;mark.benvenuto@mongodb.com&apos;, &apos;username&apos;: &apos;markbenvenuto&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-77700&quot; title=&quot;Replace MurmurHash3 with absl::Hash if possible in HashBlock::Hash&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-77700&quot;&gt;&lt;del&gt;SERVER-77700&lt;/del&gt;&lt;/a&gt; Replace MurmurHash3 with absl::Hash if possible in HashBlock::Hash&lt;br/&gt;
Branch: EVG-17874-taskgen-test&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/0685743d3a2b077a54a4d06f23a9d807ba3efe5c&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/0685743d3a2b077a54a4d06f23a9d807ba3efe5c&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5536496" author="xgen-internal-githook" created="Fri, 30 Jun 2023 12:23:36 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;liubov.molchanova&apos;, &apos;email&apos;: &apos;liubov.molchanova@mongodb.com&apos;, &apos;username&apos;: &apos;liubov-molchanova&apos;}
&lt;p&gt;Message: Revert &quot;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-77700&quot; title=&quot;Replace MurmurHash3 with absl::Hash if possible in HashBlock::Hash&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-77700&quot;&gt;&lt;del&gt;SERVER-77700&lt;/del&gt;&lt;/a&gt; Replace MurmurHash3 with absl::Hash if possible in HashBlock::Hash&quot;&lt;/p&gt;

&lt;p&gt;This reverts commit 0685743d3a2b077a54a4d06f23a9d807ba3efe5c.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/9b0bd760d2704daeb1c940be5cfe5801c5e00238&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/9b0bd760d2704daeb1c940be5cfe5801c5e00238&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5535028" author="xgen-internal-githook" created="Thu, 29 Jun 2023 20:09:58 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Mark Benvenuto&apos;, &apos;email&apos;: &apos;mark.benvenuto@mongodb.com&apos;, &apos;username&apos;: &apos;markbenvenuto&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-77700&quot; title=&quot;Replace MurmurHash3 with absl::Hash if possible in HashBlock::Hash&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-77700&quot;&gt;&lt;del&gt;SERVER-77700&lt;/del&gt;&lt;/a&gt; Replace MurmurHash3 with absl::Hash if possible in HashBlock::Hash&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/0685743d3a2b077a54a4d06f23a9d807ba3efe5c&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/0685743d3a2b077a54a4d06f23a9d807ba3efe5c&lt;/a&gt;&lt;/p&gt;</comment>
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