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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>[GODRIVER-2026] Reduce allocations in bsonrw.valueReader and bsoncodec.MapCodec</title>
                <link>https://jira.mongodb.org/browse/GODRIVER-2026</link>
                <project id="14289" key="GODRIVER">Go Driver</project>
                    <description>&lt;p&gt;In the attached memory profile of unmarshalling BSON, the &lt;tt&gt;bsonrw.valueReader#advanceFrame&lt;/tt&gt; and &lt;tt&gt;bsoncodec.MapCodec#decodeKey&lt;/tt&gt; methods make up about 25% of total allocations when decoding benchmark BSON documents, which seems unusually high. The exact source of the allocations is unclear, it requires more investigation. See the attached memory profile.&lt;/p&gt;

&lt;p&gt; &lt;span class=&quot;nobr&quot;&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/attachment/317146/317146_memprofile-unmarshal-bson.out&quot; title=&quot;memprofile-unmarshal-bson.out attached to GODRIVER-2026&quot;&gt;memprofile-unmarshal-bson.out&lt;sup&gt;&lt;img class=&quot;rendericon&quot; src=&quot;https://jira.mongodb.org/images/icons/link_attachment_7.gif&quot; height=&quot;7&quot; width=&quot;7&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/sup&gt;&lt;/a&gt;&lt;/span&gt; &lt;/p&gt;</description>
                <environment></environment>
        <key id="1757138">GODRIVER-2026</key>
            <summary>Reduce allocations in bsonrw.valueReader and bsoncodec.MapCodec</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="10300" iconUrl="https://jira.mongodb.org/images/icons/priorities/medium.svg">Unknown</priority>
                        <status id="10038" iconUrl="https://jira.mongodb.org/images/icons/subtask.gif" description="">Backlog</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="matt.dale@mongodb.com">Matt Dale</reporter>
                        <labels>
                    </labels>
                <created>Wed, 26 May 2021 01:23:43 +0000</created>
                <updated>Mon, 19 Sep 2022 01:21:36 +0000</updated>
                                                                            <component>Performance</component>
                                        <votes>1</votes>
                                    <watches>3</watches>
                                                                                                                    <issuelinks>
                            <issuelinktype id="10012">
                    <name>Related</name>
                                            <outwardlinks description="related to">
                                        <issuelink>
            <issuekey id="1400175">GODRIVER-1670</issuekey>
        </issuelink>
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                <attachments>
                            <attachment id="317146" name="memprofile-unmarshal-bson.out" size="5741" author="matt.dale@mongodb.com" created="Wed, 26 May 2021 01:20:48 +0000"/>
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