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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-61712] Make ObjectId encoded in BSONColumn more efficient</title>
                <link>https://jira.mongodb.org/browse/SERVER-61712</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently, the least significant byte is timestamp and the second least counter. But because the counter is always incremented we essentially get a 2 byte change for both an update in timestamp or counter.&lt;/p&gt;

&lt;p&gt;If we re-arrange to have the counter in the least significant byte we should be able to get a smaller 1 byte delta when only the counter is updated.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1931974">SERVER-61712</key>
            <summary>Make ObjectId encoded in BSONColumn more efficient</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="13201">Fixed</resolution>
                                        <assignee username="henrik.edin@mongodb.com">Henrik Edin</assignee>
                                    <reporter username="henrik.edin@mongodb.com">Henrik Edin</reporter>
                        <labels>
                    </labels>
                <created>Tue, 23 Nov 2021 14:16:01 +0000</created>
                <updated>Sun, 29 Oct 2023 21:45:39 +0000</updated>
                            <resolved>Tue, 30 Nov 2021 20:10:13 +0000</resolved>
                                                    <fixVersion>5.2.0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="4222115" author="xgen-internal-githook" created="Tue, 30 Nov 2021 20:00:21 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Henrik Edin&apos;, &apos;email&apos;: &apos;henrik.edin@mongodb.com&apos;, &apos;username&apos;: &apos;henrikedin&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-61712&quot; title=&quot;Make ObjectId encoded in BSONColumn more efficient&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-61712&quot;&gt;&lt;del&gt;SERVER-61712&lt;/del&gt;&lt;/a&gt; Change ObjectId encoding for BSONColumn&lt;/p&gt;

&lt;p&gt;Least significant counter byte is now least significant byte in encoding. Allows for smaller deltas when only counter is updated. Having timestamp as least significant does not help as counter is always updated.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/1e754b14dcd3d904c7fbe1d7b719a5a7c9368365&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/1e754b14dcd3d904c7fbe1d7b719a5a7c9368365&lt;/a&gt;&lt;/p&gt;</comment>
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