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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-58961] Reduce the overhead from ReshardingDonorWriteRouter on the write codepath</title>
                <link>https://jira.mongodb.org/browse/SERVER-58961</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Still TBD what can actually be done here and is realistically pending a profile of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-58960&quot; title=&quot;Measure the overhead from ShardingWriteRouter on the write codepath&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-58960&quot;&gt;&lt;del&gt;SERVER-58960&lt;/del&gt;&lt;/a&gt;. Some thoughts if extracting the shard key value under the new shard key pattern is expensive would be:&lt;/p&gt;

&lt;ul&gt;
	&lt;li&gt;Extract the shard key value as a KeyString instead of a BSONObj so it doesn&apos;t need to be converted afterwards to query the ChunkManager for the new owning ShardId.&lt;/li&gt;
	&lt;li&gt;Extract the current shard key value and new shard key value in a single pass over the BSONObj.&lt;/li&gt;
	&lt;li&gt;(Specific to updates) Cache the current shard key value and new shard key value from what was extracted already in UpdateStage to avoid doing it a second time in OpObserverImpl.&lt;/li&gt;
&lt;/ul&gt;
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                <environment></environment>
        <key id="1836240">SERVER-58961</key>
            <summary>Reduce the overhead from ReshardingDonorWriteRouter on the write codepath</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="12300">Won&apos;t Do</resolution>
                                        <assignee username="backlog-server-sharding-nyc">[DO NOT USE] Backlog - Sharding NYC</assignee>
                                    <reporter username="max.hirschhorn@mongodb.com">Max Hirschhorn</reporter>
                        <labels>
                            <label>PM-234</label>
                            <label>PM-234-T-perf</label>
                    </labels>
                <created>Fri, 30 Jul 2021 01:56:26 +0000</created>
                <updated>Tue, 6 Dec 2022 01:04:18 +0000</updated>
                            <resolved>Wed, 27 Oct 2021 00:05:28 +0000</resolved>
                                                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
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