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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-74732] mcpu=native flag for arm</title>
                <link>https://jira.mongodb.org/browse/SERVER-74732</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;During the talk on 3/9 James Greenhalgh recommend we compile with &quot;-O3 -mcpu=native&quot;. We should see what kinds of improvements we can unlock by building with those flags.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2285307">SERVER-74732</key>
            <summary>mcpu=native flag for arm</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="9">Done</resolution>
                                        <assignee username="alex.neben@mongodb.com">Alex Neben</assignee>
                                    <reporter username="alex.neben@mongodb.com">Alex Neben</reporter>
                        <labels>
                    </labels>
                <created>Thu, 9 Mar 2023 22:14:36 +0000</created>
                <updated>Sat, 25 Mar 2023 22:46:56 +0000</updated>
                            <resolved>Tue, 14 Mar 2023 18:11:51 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="5272118" author="JIRAUSER1268551" created="Tue, 14 Mar 2023 18:11:29 +0000"  >&lt;p&gt;All graphs show no difference for each combination. So I am going to close this as no change.&lt;/p&gt;</comment>
                            <comment id="5269123" author="JIRAUSER1268551" created="Mon, 13 Mar 2023 20:48:26 +0000"  >&lt;p&gt;&lt;a href=&quot;https://spruce.mongodb.com/version/640f735d0ae606b6d14935a2/tasks?sorts=STATUS%3AASC%3BBASE_STATUS%3ADESC&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://spruce.mongodb.com/version/640f735d0ae606b6d14935a2/tasks?sorts=STATUS%3AASC%3BBASE_STATUS%3ADESC&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://spruce.mongodb.com/version/640faa3d1e2d17d19b7f8250/tasks?sorts=STATUS%3AASC%3BBASE_STATUS%3ADESC&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://spruce.mongodb.com/version/640faa3d1e2d17d19b7f8250/tasks?sorts=STATUS%3AASC%3BBASE_STATUS%3ADESC&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://spruce.mongodb.com/version/640f98c50305b9bea040aac7/tasks?sorts=STATUS%3AASC%3BBASE_STATUS%3ADESC&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://spruce.mongodb.com/version/640f98c50305b9bea040aac7/tasks?sorts=STATUS%3AASC%3BBASE_STATUS%3ADESC&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;Tried -mcpu=native, -mcpu=native + O3, -mcpu=native + Ofast. Unclear if we can use Ofast because it does some math things. Just getting some data before figuring out if i need to talk to other teams about possibly enabling it for real.&lt;/p&gt;</comment>
                            <comment id="5262878" author="geert.bosch" created="Fri, 10 Mar 2023 00:01:22 +0000"  >&lt;p&gt;-O3 enables more aggressive inlining and loop unrolling among other things, and tends to make the code larger, often resulting in overall slowdown when indiscriminately applied to a large project, while often being beneficial on small synthetic tests such as our tests based on the Google Benchmark framework. If anything, there might be specific objects/libraries that could benefit.&lt;/p&gt;</comment>
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                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="2291616">SERVER-75012</issuekey>
        </issuelink>
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                            <attachment id="437038" name="Screenshot 2023-03-14 at 11.04.41 AM.png" size="86671" author="alex.neben@mongodb.com" created="Tue, 14 Mar 2023 18:04:47 +0000"/>
                            <attachment id="437040" name="Screenshot 2023-03-14 at 11.10.11 AM.png" size="93308" author="alex.neben@mongodb.com" created="Tue, 14 Mar 2023 18:10:15 +0000"/>
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