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JAVAPROBack then: “ Java is too slow.” Now: “Wait, <a href="https://mastodon.social/tags/Java" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Java</a> can do that?” Ingo Düppe explains why <a href="https://mastodon.social/tags/Performance" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Performance</a> is more than just speed.Do you know what’s really under the hood of your <a href="https://mastodon.social/tags/JVM" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#JVM</a> today? 👉 Read now: <a href="https://javapro.io/2025/04/07/hitchhikers-guide-to-java-performance/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://javapro.io/2025/04/07/hitchhikers-guide-to-java-performance/</a><a href="https://mastodon.social/tags/JavaConcurrency" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#JavaConcurrency</a> <a href="https://mastodon.social/tags/GraalVM" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#GraalVM</a> <a href="https://mastodon.social/tags/ProjectLoom" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ProjectLoom</a> <a href="https://mastodon.social/tags/GarbageCollection" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#GarbageCollection</a> <a href="https://mastodon.social/tags/ZGC" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ZGC</a>

JAVAPRO<a href="https://mastodon.social/tags/JVM" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#JVM</a>, GC, Loom, <a href="https://mastodon.social/tags/ZGC" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ZGC</a>. Think Java is oldschool? Then you haven’t met Ingo Düppe.How modern is your view of Java, really? Read " Hitchhiker’s Guide to <a href="https://mastodon.social/tags/Java" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Java</a> <a href="https://mastodon.social/tags/Performance" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Performance</a> " 👉 You might be surprised: <a href="https://javapro.io/2025/04/07/hitchhikers-guide-to-java-performance/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://javapro.io/2025/04/07/hitchhikers-guide-to-java-performance/</a><a href="https://mastodon.social/tags/GraalVM" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#GraalVM</a> <a href="https://mastodon.social/tags/ProjectLoom" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ProjectLoom</a> <a href="https://mastodon.social/tags/GarbageCollection" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#GarbageCollection</a> <a href="https://mastodon.social/tags/VirtualThreads" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#VirtualThreads</a>

JAVAPROWas haben HotSpot, Loom & Garbage gemeinsam? Mehr als du denkst! Ingo Düppe hat die Java-Galaxie kartiert – von 1995 bis morgen. Schon mal <a href="https://mastodon.social/tags/JVM" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#JVM</a>-Geschichte gelesen, die Spaß macht? Hier nachholen: <a href="https://javapro.io/de/hitchhikers-guide-to-java-performance/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://javapro.io/de/hitchhikers-guide-to-java-performance/</a><a href="https://mastodon.social/tags/GraalVM" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#GraalVM</a> <a href="https://mastodon.social/tags/ProjectLoom" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ProjectLoom</a> <a href="https://mastodon.social/tags/GarbageCollection" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#GarbageCollection</a> <a href="https://mastodon.social/tags/Performance" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Performance</a> <a href="https://mastodon.social/tags/ZGC" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ZGC</a>

China Business ForumThe 2025 <a href="https://mstdn.business/tags/Zhongguancun" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Zhongguancun</a> <a href="https://mstdn.business/tags/Forum" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Forum</a> (<a href="https://mstdn.business/tags/ZGC" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ZGC</a> Forum) <a href="https://mstdn.business/tags/Annual" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Annual</a> <a href="https://mstdn.business/tags/Conference" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Conference</a> opened on Thursday, transforming <a href="https://mstdn.business/tags/Beijing" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Beijing</a> into a <a href="https://mstdn.business/tags/global" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#global</a> <a href="https://mstdn.business/tags/epicenter" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#epicenter</a> of <a href="https://mstdn.business/tags/innovation" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#innovation</a>. With over 1,000 <a href="https://mstdn.business/tags/participants" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#participants</a> from 100+ countries, the five-day <a href="https://mstdn.business/tags/event" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#event</a> <a href="https://mstdn.business/tags/highlights" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#highlights</a> <a href="https://mstdn.business/tags/China" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#China</a>’s drive to advance “New <a href="https://mstdn.business/tags/Quality" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Quality</a> <a href="https://mstdn.business/tags/Productive" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Productive</a> <a href="https://mstdn.business/tags/Forces" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Forces</a>” through <a href="https://mstdn.business/tags/international" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#international</a> <a href="https://mstdn.business/tags/science" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#science</a> and <a href="https://mstdn.business/tags/technology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#technology</a> <a href="https://mstdn.business/tags/cooperation" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cooperation</a>. <a href="https://cnbusinessforum.com/zhongguancun-forum-2025-global-innovators-unite-to-shape-the-future-of-science-and-technology/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://cnbusinessforum.com/zhongguancun-forum-2025-global-innovators-unite-to-shape-the-future-of-science-and-technology/</a>

María Arias de ReynaWhen to use <a href="https://floss.social/tags/ZGC" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ZGC</a>Over 100G of memory<a href="https://floss.social/tags/Java" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Java</a><a href="https://floss.social/tags/DevBCN" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#DevBCN</a>

Gea-Suan LinJava 21 的 ZGC 在 Netflix 的效果在 Hacker News 上看到連結「Bending pause times to your will with Generational ZGC (netflixtechblog.com)」，發現這篇還沒整理：「Bending pause times to your will with Generational ZGC」，裡面講的東西都有圖有數字 (i.e. Y 軸)，<a href="https://blog.gslin.org/archives/2024/03/16/11698/java-21-%e7%9a%84-zgc-%e5%9c%a8-netflix-%e7%9a%84%e6%95%88%e6%9e%9c/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://blog.gslin.org/archives/2024/03/16/11698/java-21-%e7%9a%84-zgc-%e5%9c%a8-netflix-%e7%9a%84%e6%95%88%e6%9e%9c/</a><a href="https://abpe.org/tags/Computer" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Computer</a> <a href="https://abpe.org/tags/Murmuring" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Murmuring</a> <a href="https://abpe.org/tags/Network" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Network</a> <a href="https://abpe.org/tags/Programming" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Programming</a> <a href="https://abpe.org/tags/Service" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Service</a> <a href="https://abpe.org/tags/Software" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Software</a> <a href="https://abpe.org/tags/collection" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#collection</a> <a href="https://abpe.org/tags/g1" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#g1</a> <a href="https://abpe.org/tags/g1gc" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#g1gc</a> <a href="https://abpe.org/tags/garbage" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#garbage</a> <a href="https://abpe.org/tags/java" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#java</a> <a href="https://abpe.org/tags/jvm" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#jvm</a> <a href="https://abpe.org/tags/memory" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#memory</a> <a href="https://abpe.org/tags/netflix" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#netflix</a> <a href="https://abpe.org/tags/performance" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#performance</a> <a href="https://abpe.org/tags/z" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#z</a> <a href="https://abpe.org/tags/zgc" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#zgc</a>

Alexander Reelsen"For a given CPU utilization target, ZGC improves both average and P99 latencies with equal or better CPU utilization when compared to G1."Finally someone coming out with some number comparisons of using ZGC in their workload - still hoping for the big Java projects to follow, or at least have some benchmark/CI numbers public.<a href="https://netflixtechblog.com/bending-pause-times-to-your-will-with-generational-zgc-256629c9386b" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://netflixtechblog.com/bending-pause-times-to-your-will-with-generational-zgc-256629c9386b</a> <a href="https://mastodon.social/tags/java" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#java</a> <a href="https://mastodon.social/tags/zgc" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#zgc</a>

Ian Brown :verified:A really great post on <a href="https://mastodon.hccp.org/tags/Netflix" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Netflix</a>’s use of <a href="https://mastodon.hccp.org/tags/ZGC" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ZGC</a> by <a href="https://mastodon.hccp.org/tags/JVMEcosystem" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#JVMEcosystem</a> engineer <a href="https://hachyderm.io/@dannythomas" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@dannythomas</a>.<a href="https://netflixtechblog.com/bending-pause-times-to-your-will-with-generational-zgc-256629c9386b" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://netflixtechblog.com/bending-pause-times-to-your-will-with-generational-zgc-256629c9386b</a><a href="https://mastodon.hccp.org/tags/Java" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Java</a> <a href="https://mastodon.hccp.org/tags/JVM" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#JVM</a> <a href="https://mastodon.hccp.org/tags/GC" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#GC</a>

Erik C. ThauvinBoost Your Java Application Performance with Generational ZGC in JDK21<a href="https://mastodon.social/tags/java" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#java</a> <a href="https://mastodon.social/tags/jdk" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#jdk</a> <a href="https://mastodon.social/tags/performance" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#performance</a> <a href="https://mastodon.social/tags/zgc" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#zgc</a><a href="https://levelup.gitconnected.com/boost-your-java-application-performance-with-generational-zgc-in-jdk21-83c0dbcd1e6d?utm_medium=erik.in&utm_source=mastodon" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://levelup.gitconnected.com/boost-your-java-application-performance-with-generational-zgc-in-jdk21-83c0dbcd1e6d?utm_medium=erik.in&utm_source=mastodon</a>

LisPi<a href="https://vulpine.club/@violet" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@violet</a> Regarding low-collection overhead, there are also strategies like <a href="https://mastodon.top/tags/Ada" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Ada</a>'s storage pools and <a href="https://mastodon.top/tags/Java" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Java</a>'s <a href="https://mastodon.top/tags/ZGC" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ZGC</a>'s concurrent garbage collection (<a href="https://wiki.openjdk.org/display/zgc/Main" rel="nofollow noopener noreferrer" target="_blank">https://wiki.openjdk.org/display/zgc/Main</a>), where the variance is very predictable (strict guarantee: won't be more than 1ms iirc; I think it qualifies as a firm real-time garbage collector) .Storage pools have been implemented in <a href="https://mastodon.top/tags/CommonLisp" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#CommonLisp</a> before, and there's no reason implementations cannot have realtime garbage collectors (iirc NASA has done it before).

LisPi<a href="https://mastodon.social/@programming_discussions" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@programming_discussions</a>It also sounds like they didn't even try <a href="https://mastodon.top/tags/ZGC" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ZGC</a> (<a href="https://wiki.openjdk.org/display/zgc/Main" rel="nofollow noopener noreferrer" target="_blank">https://wiki.openjdk.org/display/zgc/Main</a>) since they're mentioning GC pauses as a problem and apparently their best answer to that was restarting nodes rather than configuring them to use a better GC.Heap settings are really just tuning the same GC, not changing it.<a href="https://astolfo.social/@natty" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@natty</a><a href="https://mastodon.top/tags/Java" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Java</a> <a href="https://mastodon.top/tags/JVM" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#JVM</a> <a href="https://mastodon.top/tags/GarbageCollection" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#GarbageCollection</a>

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