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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-83514] Stop using stdx::variant internally in bulkWrite</title>
                <link>https://jira.mongodb.org/browse/SERVER-83514</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently we have the bulkWrite operation take in an ops array of the form &lt;tt&gt;array&amp;lt;variant&amp;lt;InsertOp, UpdateOp, DeleteOp&amp;gt;&amp;gt;&lt;/tt&gt;. Internally (i.e. within the server code, from the parsing step onwards), we represent this as a &lt;tt&gt;std::vector&amp;lt;stdx::variant&amp;lt;BulkWriteInsertOp, ...&amp;gt;&amp;gt;&lt;/tt&gt;.&lt;/p&gt;

&lt;p&gt;But there isn&apos;t any need to do this internally. For example, internally we can maintain three different vectors - one for each type of operation - and during parsing we can append to the correct vector based on the type of operation and have some bookkeeping through indexes.&lt;/p&gt;

&lt;p&gt;Likewise, during parsing, we can add to a vector of common fields (like nsInfo index) so that for any operation at some index, we just need to access the vector of common fields and we don&apos;t have to call &lt;tt&gt;visit()&lt;/tt&gt; on a variant.&lt;/p&gt;

&lt;p&gt;This should bring down overall bulkWrite execution time down by at least 1%.&lt;/p&gt;
</description>
                <environment></environment>
        <key id="2506758">SERVER-83514</key>
            <summary>Stop using stdx::variant internally in bulkWrite</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="backlog-server-repl">Backlog - Replication Team</assignee>
                                    <reporter username="vishnu.kaushik@mongodb.com">Vishnu Kaushik</reporter>
                        <labels>
                            <label>milestone-1</label>
                    </labels>
                <created>Tue, 21 Nov 2023 20:58:10 +0000</created>
                <updated>Thu, 7 Dec 2023 19:27:57 +0000</updated>
                            <resolved>Thu, 7 Dec 2023 19:27:57 +0000</resolved>
                                                                                        <votes>0</votes>
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                                                                                                                <comments>
                            <comment id="5933973" author="JIRAUSER1265594" created="Thu, 7 Dec 2023 19:27:57 +0000"  >&lt;p&gt;Not doing this as it would be very complicated to do and our performance is good enough as is&lt;/p&gt;</comment>
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