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        <build-number>9120002</build-number>
        <build-date>10-01-2024</build-date>
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<item>
            <title>[MC-9310] Extreme performance loss with Smooth Lighting in snapshot.</title>
                <link>https://bugs.mojang.com/browse/MC-9310</link>
                <project id="10400" key="MC">Minecraft: Java Edition</project>
                    <description>&lt;p&gt;Running the new 13w05b snapshot, spawning a new world I am suffering from extreme performance loss, running at 30-80 fps with extreme stuttering (very unsmooth). I read about the lighting updates, turned off Smooth Lighting and my fps increased to an extremely smooth 140-200fps. This is confined to the Smooth Lighting setting. I tried Fullscreen to make sure Vsync or anything of the sort was the issue, but the FPS drop was still there&lt;/p&gt;

&lt;p&gt;This is a bug, as in previous versions I would loose 5-10 FPS, if that. In fact, running Minecraft 1.4.7 with GLSL Shaders I can run at a locked 55 fps on Normal render distance, and turning off Smooth Lighting on an obviously GPU bound setup gained around 5 fps. This 1.4.7 setup included Optifine for performance and more.&lt;/p&gt;

&lt;p&gt;The new lighting is causing a massive, unusual loss in FPS on a relatively high end rig. It also slows down chunk loading slightly, visible but not visible over the already slow loading on an SSD.&lt;/p&gt;

&lt;p&gt;Edit: Just noticed this is a duplicate of &lt;a href=&quot;https://bugs.mojang.com/browse/MC-8824&quot; title=&quot;FPS Drop due to Smooth Lighting&quot; class=&quot;issue-link&quot; data-issue-key=&quot;MC-8824&quot;&gt;&lt;del&gt;MC-8824&lt;/del&gt;&lt;/a&gt;, sorry.&lt;/p&gt;</description>
                <environment>Windows 7 64bit, Java 7 Update 9, GTX 660, i7 870, 128GB SSD, 8GB RAM, Nvidia driver 310.96, fresh spawn.</environment>
        <key id="22889">MC-9310</key>
            <summary>Extreme performance loss with Smooth Lighting in snapshot.</summary>
                <type id="1" iconUrl="https://bugs.mojang.com/secure/viewavatar?size=xsmall&amp;avatarId=18903&amp;avatarType=issuetype">Bug</type>
                                    <status id="5" iconUrl="https://bugs.mojang.com/images/icons/statuses/resolved.png" description="A resolution has been taken, and it is awaiting verification by reporter. From here issues are either reopened, or are closed.">Resolved</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="3">Duplicate</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="firefreak111">Matthew Faust</reporter>
                        <labels>
                            <label>rendering</label>
                    </labels>
                <created>Thu, 7 Feb 2013 11:06:37 +0100</created>
                <updated>Sun, 10 Feb 2013 03:45:16 +0100</updated>
                            <resolved>Thu, 7 Feb 2013 12:47:08 +0100</resolved>
                                    <version>Snapshot 13w05a</version>
                    <version>Snapshot 13w05b</version>
                                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                            <comments>
                            <comment id="44171" author="mustek" created="Thu, 7 Feb 2013 12:47:08 +0100"  >&lt;p&gt;Duplicate of: &lt;a href=&quot;https://bugs.mojang.com/browse/MC-8824&quot; title=&quot;FPS Drop due to Smooth Lighting&quot; class=&quot;issue-link&quot; data-issue-key=&quot;MC-8824&quot;&gt;&lt;del&gt;MC-8824&lt;/del&gt;&lt;/a&gt; - Please use the &lt;a href=&quot;https://mojang.atlassian.net/secure/IssueNavigator.jspa?&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;search function&lt;/a&gt; to see if your bug has already been submitted.&lt;br/&gt;
Currently over 50% of tickets are being closed as duplicate.&lt;/p&gt;</comment>
                            <comment id="44166" author="firefreak111" created="Thu, 7 Feb 2013 11:14:09 +0100"  >&lt;p&gt;Comparison of the FPS, 80 fps when enabled without a fully loaded world.&lt;/p&gt;</comment>
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                            <attachment id="21250" name="2013-02-07_20.12.37.png" size="548689" author="firefreak111" created="Thu, 7 Feb 2013 11:14:09 +0100"/>
                            <attachment id="21251" name="2013-02-07_20.12.45.png" size="393136" author="firefreak111" created="Thu, 7 Feb 2013 11:14:09 +0100"/>
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