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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-81144] Compute QueryShapeHash from QueryShape without full serialization</title>
                <link>https://jira.mongodb.org/browse/SERVER-81144</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently QueryShapeHash (256 bits) as is used by the Query Settings, can only be computed once QueryShape is fully serialized into BSON.&lt;/p&gt;

&lt;p&gt;This ticket should investigate the implementation of QueryShapeHash computation without full serialization, but rather through computing the hash of individual shape components and then combining it into the QueryShapeHash value.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;Futhermore, even if absl hash is used, we may avoid generating the QueryShape and go for QueryShapeHash directly, in order to gain additional performance&lt;/p&gt;</description>
                <environment></environment>
        <key id="2444772">SERVER-81144</key>
            <summary>Compute QueryShapeHash from QueryShape without full serialization</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="denis.grebennicov@mongodb.com">Denis Grebennicov</assignee>
                                    <reporter username="denis.grebennicov@mongodb.com">Denis Grebennicov</reporter>
                        <labels>
                            <label>M3</label>
                    </labels>
                <created>Mon, 18 Sep 2023 14:31:29 +0000</created>
                <updated>Sat, 6 Jan 2024 14:59:01 +0000</updated>
                            <resolved>Sat, 6 Jan 2024 14:48:48 +0000</resolved>
                                                    <fixVersion>7.3.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="5991354" author="xgen-internal-githook" created="Sat, 6 Jan 2024 14:59:01 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Denis Grebennicov&apos;, &apos;email&apos;: &apos;denis.grebennicov@mongodb.com&apos;, &apos;username&apos;: &apos;denis631&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-81144&quot; title=&quot;Compute QueryShapeHash from QueryShape without full serialization&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-81144&quot;&gt;&lt;del&gt;SERVER-81144&lt;/del&gt;&lt;/a&gt; Compute QueryShapeHash from QueryShape without full serialization (#17548)&lt;/p&gt;

&lt;p&gt;Before this patch, in order to compute SHA256 hash of the query shape, a&lt;br/&gt;
full serialization into a BSONObj was necessary, which was later hashed&lt;br/&gt;
using SHA256 algorithm. This patch remove the full serialization into&lt;br/&gt;
BSONObj and instead relies on hash combining of individual query shape&lt;br/&gt;
components. This provides performance boost when computing the hash.&lt;/p&gt;

&lt;p&gt;GitOrigin-RevId: 9f636e46a72e3fbf91046f23d199e23ea6acdb6f&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/2d2c9b1d2c767a03a1abe3c4b9aab9e0542ab225&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/2d2c9b1d2c767a03a1abe3c4b9aab9e0542ab225&lt;/a&gt;&lt;/p&gt;</comment>
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                            <issuelinktype id="10012">
                    <name>Related</name>
                                            <outwardlinks description="related to">
                                        <issuelink>
            <issuekey id="2499279">SERVER-83217</issuekey>
        </issuelink>
                            </outwardlinks>
                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="2409371">SERVER-79736</issuekey>
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