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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-21072] optimize rpc::readRequestMetadata</title>
                <link>https://jira.mongodb.org/browse/SERVER-21072</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;rpc::readRequestMetadata currently has some inefficiencies, such as scanning the same BSON object 3 times and allocating ErrorInfos on the empty-metadata path. As this is hot code (on the command path) it should be optimized.&lt;/p&gt;

&lt;p&gt;As part of this work, the format of ServerSelectionMetadata on the wire will change. Instead of having $readPreference and $secondaryOk be top-level fields of the metadata object, they will be sub-objects of a top-level $ssm object. As such this work needs to get in to rc1, given that we need to support rolling upgrade from rc1 to rc2 (but not rc0 to rc1).&lt;/p&gt;</description>
                <environment></environment>
        <key id="235674">SERVER-21072</key>
            <summary>optimize rpc::readRequestMetadata</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="9">Done</resolution>
                                        <assignee username="adam.midvidy">Adam Midvidy</assignee>
                                    <reporter username="adam.midvidy">Adam Midvidy</reporter>
                        <labels>
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                <created>Thu, 22 Oct 2015 14:45:17 +0000</created>
                <updated>Tue, 27 Oct 2015 17:08:30 +0000</updated>
                            <resolved>Fri, 23 Oct 2015 19:01:08 +0000</resolved>
                                                    <fixVersion>3.2.0-rc1</fixVersion>
                                    <component>Internal Code</component>
                    <component>Networking</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="1069310" author="xgen-internal-githook" created="Fri, 23 Oct 2015 19:01:00 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;amidvidy&apos;, u&apos;name&apos;: u&apos;Adam Midvidy&apos;, u&apos;email&apos;: u&apos;amidvidy@gmail.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-21072&quot; title=&quot;optimize rpc::readRequestMetadata&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-21072&quot;&gt;&lt;del&gt;SERVER-21072&lt;/del&gt;&lt;/a&gt; optimize rpc::readRequestMetadata&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/3e1d9d183f9e5f184de23bde145962cd86812c68&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/3e1d9d183f9e5f184de23bde145962cd86812c68&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="230286">SERVER-20609</issuekey>
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