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    <title>MongoDB Jira</title>
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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-43747] Avoid using KeyString::getKeySize() in WiredTigerIndex when possible</title>
                <link>https://jira.mongodb.org/browse/SERVER-43747</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;There are a few calls to KeyString::getKeySize() in WiredTigerIndex such as &lt;a href=&quot;https://github.com/mongodb/mongo/blob/98939f35ef1f58566b20ac5e78debb42a56b0366/src/mongo/db/storage/wiredtiger/wiredtiger_index.cpp#L848-L849&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;&#160;to determine if the KeyString has a RecordId appended. We should avoid calling this method when possible because it reconstructs the entire KeyString which is an expensive operation.&lt;/p&gt;

&lt;p&gt;There are a couple known cases when we know whether the RecordId is appended to the KeyString or not.&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;_id indexes: these never have the RecordId appended.&lt;/li&gt;
	&lt;li&gt;Non-unique indexes: they always have the RecordId appended.&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="947625">SERVER-43747</key>
            <summary>Avoid using KeyString::getKeySize() in WiredTigerIndex when possible</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="geert.bosch@mongodb.com">Geert Bosch</assignee>
                                    <reporter username="gregory.wlodarek@mongodb.com">Gregory Wlodarek</reporter>
                        <labels>
                    </labels>
                <created>Tue, 1 Oct 2019 18:32:33 +0000</created>
                <updated>Sun, 29 Oct 2023 22:16:36 +0000</updated>
                            <resolved>Tue, 15 Oct 2019 16:54:36 +0000</resolved>
                                                    <fixVersion>4.3.1</fixVersion>
                                    <component>Index Maintenance</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="2478209" author="xgen-internal-githook" created="Fri, 11 Oct 2019 16:39:37 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Geert Bosch&apos;, &apos;username&apos;: &apos;GeertBosch&apos;, &apos;email&apos;: &apos;geert.bosch@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-43747&quot; title=&quot;Avoid using KeyString::getKeySize() in WiredTigerIndex when possible&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-43747&quot;&gt;&lt;del&gt;SERVER-43747&lt;/del&gt;&lt;/a&gt; Skip getKeySize for non-unique indexes&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/1e702a5ca25a2e78756380d1ef22d8e12b94694c&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/1e702a5ca25a2e78756380d1ef22d8e12b94694c&lt;/a&gt;&lt;/p&gt;</comment>
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