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    <description>This file is an XML representation of an issue</description>
    <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-42261] improve inefficient GenericArgument predicates</title>
                <link>https://jira.mongodb.org/browse/SERVER-42261</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;tt&gt;src/mongo/db/command_generic_argument.cpp&lt;/tt&gt; defines:&lt;/p&gt;
&lt;p/&gt;
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&lt;p/&gt;
&lt;p&gt;These are implemented by a table lookup via linear search on a std::array of struct, and then returning the value of a bool member of the struct. Two improvements:&lt;/p&gt;

&lt;p&gt;1) Switch from linear search to binary search.&lt;/p&gt;

&lt;p&gt;2) Each predicate should not have to search through structs that contain a false. That is, search a smaller pre-filtered array such that successful find automatically means the predicate is true.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;These predicates are called on every field of every request and response, so their speed feels important.&lt;/p&gt;</description>
                <environment></environment>
        <key id="859985">SERVER-42261</key>
            <summary>improve inefficient GenericArgument predicates</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="billy.donahue@mongodb.com">Billy Donahue</assignee>
                                    <reporter username="billy.donahue@mongodb.com">Billy Donahue</reporter>
                        <labels>
                    </labels>
                <created>Wed, 17 Jul 2019 17:31:29 +0000</created>
                <updated>Sun, 29 Oct 2023 22:19:00 +0000</updated>
                            <resolved>Wed, 17 Jul 2019 22:51:46 +0000</resolved>
                                    <version>4.3 Desired</version>
                                    <fixVersion>4.3.1</fixVersion>
                                    <component>Internal Code</component>
                                        <votes>0</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="2331281" author="xgen-internal-githook" created="Wed, 17 Jul 2019 22:45:01 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Billy Donahue&apos;, &apos;username&apos;: &apos;BillyDonahue&apos;, &apos;email&apos;: &apos;billy.donahue@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-42261&quot; title=&quot;improve inefficient GenericArgument predicates&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-42261&quot;&gt;&lt;del&gt;SERVER-42261&lt;/del&gt;&lt;/a&gt; faster generic args predicates&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/efeb79b3275f4ec6dc401a4c4a44fa4353d972ba&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/efeb79b3275f4ec6dc401a4c4a44fa4353d972ba&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2330748" author="billy.donahue" created="Wed, 17 Jul 2019 17:32:03 +0000"  >&lt;p&gt;&lt;a href=&quot;https://mongodbcr.appspot.com/500150014/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://mongodbcr.appspot.com/500150014/&lt;/a&gt;&lt;/p&gt;</comment>
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