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TIL: G1 adaptive InitiatingHeapOccupancyPercent (default since JDK 9) can be the reason of longer, more frequent GC pauses, and higher CPU usage.pic.twitter.com/4mEjB7EdfW
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Andrei Pangin proslijedio/la je Tweet
C2 stack allocation prototype by
@JavaAtMicrosoft@crgracie. Good times
https://mail.openjdk.java.net/pipermail/hotspot-compiler-dev/2020-January/036835.html …Hvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
Andrei Pangin proslijedio/la je Tweet
Ever wondered where you can download a suitable build of OpenJDK? I made a best effort to compile a list of all production-targeted builds that I am aware of, including OS, architecture, licensing, support and maintenance windows. https://rafael.codes/openjdk/
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Andrei Pangin proslijedio/la je Tweet
You can also try https://github.com/reactor/BlockHound … to detect blocking calls even before production
@netty_project will support it OOTB soon too: https://github.com/netty/netty/pull/9687 …Hvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
I keep seeing instructions to install 'perf' in order to run async-profiler. Even
@intellijidea documentation suggests this. I hereby declare that async-profiler in no way depends on Linux perf. It rather uses perf_event_open syscall available without any additional software.Hvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
I hope this presentation will answer many questions about excessive memory usage of a Java process. How to find where large RSS comes from, how to monitor native memory consumption and how to profile off-heap allocations.https://twitter.com/JVMPerformance/status/1185100235502247936 …
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Well, the answer depends on how 'method' is obtained. When I call Class.getDeclaredMethod(), the returned object reflects all redefineClasses() changes. But if I cache java.lang.reflect.Method myself, it won't see new annotations. This is a bug https://bugs.openjdk.java.net/browse/JDK-6422536 …
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If I add a new annotation to a Java method with Instrumentation.redefineClasses(), will method.getDeclaredAnnotations() return this new annotation?
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Andrei Pangin proslijedio/la je Tweet
Revise old performance recommendations! https://stackoverflow.com/a/58199878/4856258 …
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Andrei Pangin proslijedio/la je Tweet
Getting a Russian visa to visit St. Petersburg for residents of EU and some other countries is now incredibly easy! It's a good chance to visit the Joker Conference! http://electronic-visa.kdmid.ru/spb_home_en.html …https://jokerconf.com/en/
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Thanks everyone who attended my
#CodeOne session "Mastering Java Performance with async-profiler"! Here are the slides with the code samples:https://github.com/apangin/codeone2019-java-profiling …Hvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
Found myself in subconscious optimization: packed two messages into one batchhttps://twitter.com/AndreiPangin/status/1171183593852420098 …
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Released async-profiler 1.6: https://github.com/jvm-profiling-tools/async-profiler/releases/tag/v1.6 … If you happen to be at
#CodeOne next week, join my session about profiling tips and tricks: https://events.rainfocus.com/widget/oracle/oow19/catalogcodeone19?search=async-profiler …Hvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
Andrei Pangin proslijedio/la je Tweet
Awesome blog post: "Discovering Hard Disk Physical Geometry though Microbenchmarking" http://blog.stuffedcow.net/2019/09/hard-disk-geometry-microbenchmarking/ …pic.twitter.com/z8bjMZ0eiA
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Andrei Pangin proslijedio/la je Tweet
Java capturing lambdas are a really subtle performance issue. I've seen people use them in loops so many times without realising the potential consequences. Only regular profiling seems to help.
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Andrei Pangin proslijedio/la je Tweet
TCP против UDP или будущее сетевых протоколов https://habr.com/ru/company/oleg-bunin/blog/461829/ … via
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Andrei Pangin proslijedio/la je Tweet
Russian-speaking friends - help spread the word about "Optimizing Java" being released in Russian - https://www.ozon.ru/context/detail/id/149831753/ …
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Andrei Pangin proslijedio/la je Tweet
A JVM does that? by
@cliff_click for@JUGruhttps://www.youtube.com/watch?v=RtHA1YVLW5Y …Hvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
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Andrei Pangin proslijedio/la je Tweet
Automatically generated release notes for OpenJDK 8u222, 11.0.4, 12.0.2 (still struggling to mention security fixes there, but whatever): https://builds.shipilev.net/backports-monitor/release-notes-openjdk8u222.txt … https://builds.shipilev.net/backports-monitor/release-notes-11.0.4.txt … https://builds.shipilev.net/backports-monitor/release-notes-12.0.2.txt …
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