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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-54804] Investigate performance improvements for command execution path</title>
                <link>https://jira.mongodb.org/browse/SERVER-54804</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-49107&quot; title=&quot;Add async command API&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-49107&quot;&gt;&lt;del&gt;SERVER-49107&lt;/del&gt;&lt;/a&gt; and &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-51690&quot; title=&quot;Add support for async command execution to Mongos&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-51690&quot;&gt;&lt;del&gt;SERVER-51690&lt;/del&gt;&lt;/a&gt; changed the command execution path for &lt;tt&gt;mongod&lt;/tt&gt; and &lt;tt&gt;mongos&lt;/tt&gt;, respectively, to use future continuations and allow asynchronous execution of database commands. These future continuations add some overhead to command execution and could reduce the average throughput by up to 8%.&lt;/p&gt;

&lt;p&gt;This ticket should investigate possible improvements that reduce the cost of the future continuations. In particular, reducing the number of future continuations (i.e., the number of &lt;tt&gt;then&lt;/tt&gt; and &lt;tt&gt;onError&lt;/tt&gt; continuations), using fewer allocations in &lt;tt&gt;service_entry_point_common.cpp&lt;/tt&gt; and &lt;tt&gt;strategy.cpp&lt;/tt&gt;, and improving the infrastructure to construct recursive futures (&lt;a href=&quot;https://github.com/mongodb/mongo/blob/1b9ac0b229a42483306cbddc753b9c2b1f5be97b/src/mongo/s/commands/strategy.cpp#L1006-L1030&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;see here&lt;/a&gt;)&#160;could help with reducing the execution overhead.&lt;/p&gt;

&lt;p&gt;&lt;b&gt;Acceptance criteria:&lt;/b&gt;&#160;writing new tickets that will improve the performance of command execution path, for both &lt;tt&gt;mongod&lt;/tt&gt; and &lt;tt&gt;mongos&lt;/tt&gt;.&lt;/p&gt;</description>
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        <key id="1634408">SERVER-54804</key>
            <summary>Investigate performance improvements for command execution path</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="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-server-servicearch">Backlog - Service Architecture</assignee>
                                    <reporter username="amirsaman.memaripour@mongodb.com">Amirsaman Memaripour</reporter>
                        <labels>
                            <label>sa-remove-fv-backlog-22</label>
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                <created>Fri, 26 Feb 2021 01:23:37 +0000</created>
                <updated>Tue, 6 Dec 2022 01:33:28 +0000</updated>
                                                                            <component>Internal Code</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
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