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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <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-20613] Performance Regression on Mongo-perf text tests</title>
                <link>https://jira.mongodb.org/browse/SERVER-20613</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Performance regression of 15-30% on &lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;Queries.Text.FindSingle&lt;/li&gt;
	&lt;li&gt;Queries.Text.FindSingleCaseSensitive&lt;/li&gt;
	&lt;li&gt;Queries.Text.FindThreeWords&lt;/li&gt;
	&lt;li&gt;Queries.Text.FindThreeWordsCaseSensitive&lt;/li&gt;
	&lt;li&gt;Queries.Text.FindPhrase&lt;/li&gt;
	&lt;li&gt;Queries.Text.FindPhraseCaseSensitive&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;From 3.1.4. &lt;br/&gt;
&lt;a href=&quot;https://evergreen.mongodb.com/task/performance_linux_wt_standalone_query_6fa377a6e6544fbe1dae17210056fb1c7562d8c5_15_09_17_15_28_04##%7B%22perftab%22:1,%22compare%22:%5B%7B%22tag%22:%7B%22tag%22:%223.1.4-Baseline%22%7D%7D,%7B%22tag%22:%7B%22tag%22:%223.1.5-Baseline%22%7D%7D,%7B%22tag%22:%7B%22tag%22:%223.1.6-Baseline%22%7D%7D%5D%7D&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;WT Results &lt;/a&gt;&lt;br/&gt;
&lt;a href=&quot;https://evergreen.mongodb.com/task/performance_linux_mmap_standalone_query_6fa377a6e6544fbe1dae17210056fb1c7562d8c5_15_09_17_15_28_04##%7B%22perftab%22:1,%22compare%22:%5B%7B%22tag%22:%7B%22tag%22:%223.1.5-Baseline%22%7D%7D,%7B%22tag%22:%7B%22tag%22:%223.1.4-Baseline%22%7D%7D,%7B%22tag%22:%7B%22tag%22:%223.1.5-Baseline%22%7D%7D,%7B%22tag%22:%7B%22tag%22:%223.1.6-Baseline%22%7D%7D%5D%7D&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;MMAP Results&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;Regression shows up in MMAP and wiredTiger, although seem to go away on different releases. Need to investigate to understand the regression and the difference. &lt;/p&gt;</description>
                <environment></environment>
        <key id="230292">SERVER-20613</key>
            <summary>Performance Regression on Mongo-perf text tests</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</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="3">Duplicate</resolution>
                                        <assignee username="david.daly@mongodb.com">David Daly</assignee>
                                    <reporter username="david.daly@mongodb.com">David Daly</reporter>
                        <labels>
                            <label>mpreg</label>
                    </labels>
                <created>Thu, 17 Sep 2015 17:57:36 +0000</created>
                <updated>Thu, 1 Oct 2015 20:21:48 +0000</updated>
                            <resolved>Thu, 1 Oct 2015 20:21:35 +0000</resolved>
                                                                    <component>Performance</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="1049154" author="david.daly" created="Thu, 1 Oct 2015 20:21:06 +0000"  >&lt;p&gt;After further review, the regression is due almost completely to the effects of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-19372&quot; title=&quot;Text query perf regression in commit d764e3e&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-19372&quot;&gt;&lt;del&gt;SERVER-19372&lt;/del&gt;&lt;/a&gt; and &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-19936&quot; title=&quot;Performance pass on unicode-aware text processing logic (text index v3)&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-19936&quot;&gt;&lt;del&gt;SERVER-19936&lt;/del&gt;&lt;/a&gt;. There was some weirdness in performance behavior around 3.1.5 (came and went) that added some confusion to the analysis. Closing this ticket as a duplicate of the other two. &lt;/p&gt;</comment>
                            <comment id="1042429" author="xgen-internal-githook" created="Thu, 24 Sep 2015 18:29:57 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;dalyd&apos;, u&apos;name&apos;: u&apos;dalyd&apos;, u&apos;email&apos;: u&apos;david.daly@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-20613&quot; title=&quot;Performance Regression on Mongo-perf text tests&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-20613&quot;&gt;&lt;del&gt;SERVER-20613&lt;/del&gt;&lt;/a&gt;: Lower performance target for MP Queries.Text.* until this ticket is resolved&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/a810c1d50ac35761200516a6f001602f827e3b6f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/a810c1d50ac35761200516a6f001602f827e3b6f&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1040011" author="david.daly" created="Tue, 22 Sep 2015 17:47:25 +0000"  >&lt;p&gt;This regression is due to combined effects of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-19372&quot; title=&quot;Text query perf regression in commit d764e3e&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-19372&quot;&gt;&lt;del&gt;SERVER-19372&lt;/del&gt;&lt;/a&gt;, &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-19936&quot; title=&quot;Performance pass on unicode-aware text processing logic (text index v3)&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-19936&quot;&gt;&lt;del&gt;SERVER-19936&lt;/del&gt;&lt;/a&gt;, plus maybe another 10%. Trying to isolate the remaining 10%. &lt;/p&gt;</comment>
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