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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-27129] Does ObjectId type affect lookup performance?</title>
                <link>https://jira.mongodb.org/browse/SERVER-27129</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;If if I insert documents with `_id: ObjectId().toString()` (a 24chars string) or a base64 version of it `_id: base64(ObjectId().toString())` (16chars)&lt;/p&gt;

&lt;p&gt;Will this affect performance for lookups, compared to keeping the default ObjectId type?&lt;/p&gt;</description>
                <environment></environment>
        <key id="333064">SERVER-27129</key>
            <summary>Does ObjectId type affect lookup performance?</summary>
                <type id="6" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14720&amp;avatarType=issuetype">Question</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</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="-1">Unassigned</assignee>
                                    <reporter username="caub">Cyril Auburtin</reporter>
                        <labels>
                    </labels>
                <created>Sat, 19 Nov 2016 09:26:22 +0000</created>
                <updated>Sat, 19 Nov 2016 23:38:59 +0000</updated>
                            <resolved>Sat, 19 Nov 2016 23:38:59 +0000</resolved>
                                                                    <component>Index Maintenance</component>
                    <component>JavaScript</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="1438369" author="thomas.schubert" created="Sat, 19 Nov 2016 23:38:59 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=caub&quot; class=&quot;user-hover&quot; rel=&quot;caub&quot;&gt;caub&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;Thanks for your report. Please note that SERVER project is for reporting bugs or feature suggestions for the MongoDB server. For MongoDB-related support discussion please post on the &lt;a href=&quot;http://groups.google.com/group/mongodb-user&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;mongodb-users group&lt;/a&gt; or &lt;a href=&quot;http://stackoverflow.com/questions/tagged/mongodb&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Stack Overflow with the &lt;tt&gt;mongodb&lt;/tt&gt; tag&lt;/a&gt;. A question like this involving more discussion would be best posted on the mongodb-users group where it would reach a wider audience.&lt;/p&gt;

&lt;p&gt;Kind regards,&lt;br/&gt;
Thomas&lt;/p&gt;</comment>
                            <comment id="1438227" author="caub" created="Sat, 19 Nov 2016 09:47:30 +0000"  >&lt;p&gt;For Node&apos;s driver, &lt;a href=&quot;https://github.com/mongodb/node-mongodb-native/blob/2.2/lib/collection.js#L178&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/node-mongodb-native/blob/2.2/lib/collection.js#L178&lt;/a&gt; I don&apos;t see anything that show a difference, maybe it&apos;s more in the c++ parts&lt;/p&gt;

&lt;p&gt;note: base64ObjectId is better done with: new ObjectId().generate().toString(&apos;base64&apos;)&lt;/p&gt;

&lt;p&gt;ObjectId is probably more efficient in storage space&lt;/p&gt;</comment>
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