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        <build-date>13-04-2023</build-date>
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            <title>[SERVER-85551] Lazily calculate QuerySolution hash for SBE</title>
                <link>https://jira.mongodb.org/browse/SERVER-85551</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The SBE getExecutor path &lt;a href=&quot;https://github.com/10gen/mongo/blob/0766fb001ac394aec4410d27276d1721fb72ff8a/src/mongo/db/query/get_executor.cpp#L1610-L1613&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;calculates QSN hashes&lt;/a&gt; early. These are used in the plan explainer. However we &lt;a href=&quot;https://github.com/10gen/mongo/blob/0766fb001ac394aec4410d27276d1721fb72ff8a/src/mongo/db/query/plan_explainer_sbe.cpp#L625&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;still have the QSN&lt;/a&gt; in the plan explainer, so we could lazily calculate the hash to avoid wasted work in the non-explain path.&lt;/p&gt;

&lt;p&gt;I&apos;m guessing the perf improvement is small, but still good to do for cleanliness and avoiding &quot;death by a thousand cuts&quot; pattern we see in perf charts.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;</description>
                <environment></environment>
        <key id="2553171">SERVER-85551</key>
            <summary>Lazily calculate QuerySolution hash for SBE</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="10038" iconUrl="https://jira.mongodb.org/images/icons/subtask.gif" description="">Backlog</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-query-execution">Backlog - Query Execution</assignee>
                                    <reporter username="matt.boros@mongodb.com">Matt Boros</reporter>
                        <labels>
                            <label>neweng</label>
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                <created>Mon, 22 Jan 2024 19:34:05 +0000</created>
                <updated>Tue, 23 Jan 2024 19:48:57 +0000</updated>
                                                                            <component>Performance</component>
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