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    <title>MongoDB Jira</title>
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    <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-77702] Replace MurmurHash3 with absl::Hash if possible in Value::hash_combine</title>
                <link>https://jira.mongodb.org/browse/SERVER-77702</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="2356229">SERVER-77702</key>
            <summary>Replace MurmurHash3 with absl::Hash if possible in Value::hash_combine</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="david.storch@mongodb.com">David Storch</assignee>
                                    <reporter username="dan.larkin-york@mongodb.com">Dan Larkin-York</reporter>
                        <labels>
                    </labels>
                <created>Thu, 1 Jun 2023 17:56:57 +0000</created>
                <updated>Sun, 29 Oct 2023 21:20:35 +0000</updated>
                            <resolved>Fri, 23 Jun 2023 13:47:32 +0000</resolved>
                                                    <fixVersion>7.1.0-rc0</fixVersion>
                    <fixVersion>7.0.0-rc6</fixVersion>
                                                        <votes>0</votes>
                                    <watches>12</watches>
                                                                                                                <comments>
                            <comment id="5522106" author="xgen-internal-githook" created="Fri, 23 Jun 2023 19:10:54 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;David Storch&apos;, &apos;email&apos;: &apos;david.storch@mongodb.com&apos;, &apos;username&apos;: &apos;dstorch&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-77702&quot; title=&quot;Replace MurmurHash3 with absl::Hash if possible in Value::hash_combine&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-77702&quot;&gt;&lt;del&gt;SERVER-77702&lt;/del&gt;&lt;/a&gt; Replace MurmurHash3 with absl::Hash in Value::hash_combine()&lt;/p&gt;

&lt;p&gt;(cherry picked from commit d563b873d33425bb95d7f7a1026629e69e95f9b4)&lt;br/&gt;
Branch: v7.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/120b67d21803e8eeff33b67e084eb412235be2a9&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/120b67d21803e8eeff33b67e084eb412235be2a9&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5520042" author="xgen-internal-githook" created="Fri, 23 Jun 2023 00:58:44 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;David Storch&apos;, &apos;email&apos;: &apos;david.storch@mongodb.com&apos;, &apos;username&apos;: &apos;dstorch&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-77702&quot; title=&quot;Replace MurmurHash3 with absl::Hash if possible in Value::hash_combine&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-77702&quot;&gt;&lt;del&gt;SERVER-77702&lt;/del&gt;&lt;/a&gt; Replace MurmurHash3 with absl::Hash in Value::hash_combine()&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/d563b873d33425bb95d7f7a1026629e69e95f9b4&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/d563b873d33425bb95d7f7a1026629e69e95f9b4&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5496362" author="JIRAUSER1272798" created="Tue, 13 Jun 2023 18:48:04 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=kyle.suarez%40mongodb.com&quot; class=&quot;user-hover&quot; rel=&quot;kyle.suarez@mongodb.com&quot;&gt;kyle.suarez@mongodb.com&lt;/a&gt; Should we add this to the 7.0 performance effort?&lt;/p&gt;</comment>
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            <issuekey id="2369430">SERVER-78126</issuekey>
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