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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>[JAVA-2230] Create new Document constructor taking initial capacity of LinkedHashMap</title>
                <link>https://jira.mongodb.org/browse/JAVA-2230</link>
                <project id="10006" key="JAVA">Java Driver</project>
                    <description>&lt;p&gt;Currently, when Document class is initialized, it doesn&apos;t allow setting `initialCapacity` of internal LinkedHashMap so, that value gets set to 16 everytime. This doesn&apos;t work well if I already know number of entries going to be inserted / appended. If number of entries are are less than 16 then, it&apos;s kind of creating internal linked list table with bigger size or if entries are greater than 16, it&apos;s guaranteed to do `resize()`.&lt;/p&gt;

&lt;p&gt;So, it would be nice if Document class exposes new constructor with initial capacity of internal LinkedHashMap.&lt;/p&gt;

&lt;p/&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;/**&lt;/span&gt;&lt;/pre&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; * Creates an empty Document instance with custom intial capacity&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; */&lt;/span&gt;&lt;/pre&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;public Document(int initialCapacity) {&lt;/span&gt;&lt;/pre&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    documentAsMap = new LinkedHashMap&amp;lt;String, Object&amp;gt;(initialCapacity);&lt;/span&gt;&lt;/pre&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
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&lt;p/&gt;</description>
                <environment></environment>
        <key id="294728">JAVA-2230</key>
            <summary>Create new Document constructor taking initial capacity of LinkedHashMap</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="ross@mongodb.com">Ross Lawley</assignee>
                                    <reporter username="ifx">PRAJWAL TULADHAR</reporter>
                        <labels>
                    </labels>
                <created>Fri, 17 Jun 2016 14:56:54 +0000</created>
                <updated>Mon, 5 Dec 2016 11:09:38 +0000</updated>
                            <resolved>Mon, 5 Dec 2016 11:09:38 +0000</resolved>
                                    <version>3.2.2</version>
                                                    <component>API</component>
                    <component>BSON</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="1448922" author="ross@10gen.com" created="Mon, 5 Dec 2016 11:09:38 +0000"  >&lt;p&gt;Marking as won&apos;t fix, as we don&apos;t want to expose the current underlying implementation detail of the Document class.&lt;/p&gt;</comment>
                            <comment id="1317840" author="ross@10gen.com" created="Fri, 8 Jul 2016 09:08:10 +0000"  >&lt;p&gt;Apologies for the delay in responding. I recall this coming up at MongoDB World in the JVM birds of a feather.  &lt;/p&gt;

&lt;p&gt;A reason against adding this constructor is because it exposes internal implementation details of the Document class that could in theory change. Are you facing production issues as a result of not being able to set the initial capacity?&lt;/p&gt;
</comment>
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