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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-76673] Reduce BSONColumn iterator size</title>
                <link>https://jira.mongodb.org/browse/SERVER-76673</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;BSONColumn iterators contain a lot of state, some of which is duplicated between the 64bit and 128bit types. We should reduce the size by packing the state more efficiently. This could also help performance.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2327337">SERVER-76673</key>
            <summary>Reduce BSONColumn iterator size</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="henrik.edin@mongodb.com">Henrik Edin</assignee>
                                    <reporter username="henrik.edin@mongodb.com">Henrik Edin</reporter>
                        <labels>
                    </labels>
                <created>Fri, 28 Apr 2023 15:24:49 +0000</created>
                <updated>Sun, 29 Oct 2023 21:22:17 +0000</updated>
                            <resolved>Mon, 15 May 2023 13:06:35 +0000</resolved>
                                                    <fixVersion>7.1.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="5405283" author="xgen-internal-githook" created="Fri, 5 May 2023 20:02:51 +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-76673&quot; title=&quot;Reduce BSONColumn iterator size&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-76673&quot;&gt;&lt;del&gt;SERVER-76673&lt;/del&gt;&lt;/a&gt; Reduce size of BSONColumn iterators&lt;/p&gt;

&lt;p&gt;The iterator size is roughly cut to a third by using variant to separate&lt;br/&gt;
state needed for various decoding modes and states.&lt;/p&gt;

&lt;p&gt;Also added interfaces to use the iterators as non-STL iterators, they&lt;br/&gt;
were already aware when they reached the end so no need for users to also&lt;br/&gt;
carry around an end iterator to compare against.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/815022dd56eafabcd8e710331f89122da9769fb5&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/815022dd56eafabcd8e710331f89122da9769fb5&lt;/a&gt;&lt;/p&gt;</comment>
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