Krzysztof Ślusarski @k_slusar
Joined April 2020-
Tweets224
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Following60
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The Billion Row Challenge (#1BRC) - Step-by-step from 71s to 1.7s questdb.io/blog/billion-r…
@richardstartin @Sarkies_Proxy Async-profiler is also great, especially with krzysztofslusarski.github.io/2022/12/12/asy… as a resource (@k_slusar)
Profiling virtual threads with async-profiler vs. JFR. I wish developers used proper tools more often.
Ever wondered what keeps profilers awake at night? Its thoughts on jmethodIds: Let me show you why and how I intend to remedy the situation in my new blog post mostlynerdless.de/blog/2023/07/1…
@k_slusar on the stage of @confiturapl :D Yes, there is music as well! 😁
We're excited for Saturday because of the upcoming speaker, Krzysztof Ślusarski. He's well-versed in Java with extensive experience as a trainer and speaker - you can meet him very often at @WarszawaJUG meetups 2023.confitura.pl/speakers/3c188…
Zapraszam
Na 303. WJUG nie mogliśmy sobie wymyślić lepszego tematu niż chmurowo-lotnicze aspekty mikroserwisów :D Tak więc Jan przeprowadzi nas przez temat #mikroserwisy w #cloud - z lotu ptaka. Gorąco zapraszamy! Szczegóły: meetup.com/pl-PL/warszawa…
Great talk about "feature" of JVM that @forked_franz is "advocating" a lot: youtube.com/watch?v=PxcO3W… Thanks for that one @forked_franz and @SanneGrinovero
Not only we have two Speakers on WJUG 301, but we will use two languages as well! 🇵🇱🇬🇧 @ksuszynski on how you might have chosen the wrong mesh (talk in EN) and Robert Szarejko on how to take a conscious decision when picking your GC (talk in PL) meetup.com/pl-PL/warszawa…
24-25 października chcemy zaprosić Was do Krakowa na konferencję @JDD_Krakow, którą wspieramy jako Community Partner! ➡️ UWAGA! Do 30.04.2023 są dostępne bilety Early Bird ➡️ Do 7.08.2023 można wysyłać propozycje wykładów w ramach C4P Bilety i CFP 👉 jdd.org.pl
It's happening! @confiturapl just opened their C4P 🤩 Perfect place for your 1st, 2nd...or a million-th talk. Don't miss it, apply now!
It's happening! @confiturapl just opened their C4P 🤩 Perfect place for your 1st, 2nd...or a million-th talk. Don't miss it, apply now!
Couldn’t we just use AsyncGetCallTrace in a separate thread like JFR does? We can... If we slightly modify the API :) I discuss the different approaches, advantages, and disadvantages in my newest blog post mostlynerdless.de/blog/2023/04/2…
Finally !!!!! The issue that I was describing here: krzysztofslusarski.github.io/2022/03/21/eve… is fixed and backported to JDK 17 and 11.
Kolejna transza wejściówek na THIS IS WJUG 300. właśnie pojawiły się na Allegro Charytatywni: allegro.pl/oferta/wstep-n… Szczegóły: meetup.com/warszawa-jug/e…
THIS IS WJUG! 🔥 25 kwietnia o 18:00 będziemy świętować 300. spotkanie WJUG. Będzie się działo 🍻 Na insta instagram.com/warsaw.jug właśnie ogłosiliśmy pierwszego Gościa Specjalnego, a będzie ich więcej! Szczegóły (info o biletach) na meetup.com/warszawa-jug/e…
I published my first introductory article on @InfoQ: "Unleash the Power of Open Source Java Profilers: Comparing VisualVM, JMC, and async-profiler". You can find it at infoq.com/articles/open-… :)
I am looking for work, preferably in the domain of software performance. If you know someone who would profit from the things I know, please share my contact.
Modularyzować czy nie modularyzować? Oto jest pytanie. ⛰ A może trochę modularyzować? Jeśli tak, to JAK ROBIĆ TO DOBRZE. Tyle pytań - jeden Sławek. 🔥 Zapisy i szczegóły: meetup.com/pl-PL/warszawa…
Did you know you can get a class histogram of the OldGen only? Just updated my old SO answer with the actual code for JDK 11/17 and G1GC. stackoverflow.com/a/36596077/344…
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koziolek @koziolek
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The Billion Row Challenge (#1BRC) - Step-by-step from 71s to 1.7s questdb.io/blog/billion-r…
On the last day of January 2024, our solution worked end-to-end for the first time. Przemyslaw Delewski got the first run with immense contributions from @pivovarit and Krzysztof Kiewicz. Still, there is a long way to go, but integrating early greatly reduces risk.
Woot! My friend @mtopolnik is joining #questdb, and I'm over the moon. We met at Hazelcast back in 2015, and some of my best memories include working together on the Hazelcast core team. @AndreyPechkurov: You're a true trend-setter, no doubt! 😂😂
Javascript must die - Episode #723
PM getting ready to write a jira ticket with one sentence and no acceptance criteria
Yeah, the biggest async-profiler release so far. Tons of new features and improvements!
@AndreiPangin just released version 3.0 of async-profiler after a year of adding features and fixing many bugs. You can find it at github.com/async-profiler…. Expect ap-loader to have a new release next week :)
Today is my first day at Quesma as a Founding Engineer!
Not a bad pre-seed round for 2024. Congrats @jakozaur! #techwawa therecursive.com/polish-databas…
Gratuluję @piotrprz Congrats Piotr, well deserved!
I cannot really thanks enough @AndreiPangin for #asyncprofiler candies he put into it, for example github.com/async-profiler…
@koziolek Years ago I had an issue with one class being loaded by 2 classloaders... and class equality checks also if class is from the same classloader. I loved WebSphere's (IIRC) classloaders, always something funny could be detected by it :D
@koziolek Even better - driver must be doing new Integer(), because every int was a separate object, not flyweight
[Java][Profiling] Async-profiler - manual by use cases buff.ly/3RCjfAR (via @k_slusar)
Starting a new journey in January 2024. Stay tuned!
@felixge fyi github.com/async-profiler… Well done @AndreiPangin that's a great addition!!
I would like to invite you to my talk about observability on @YavaConf on 9th December in Warsaw. Until 08.12.2023, with a special code from the Program Council: YAVA23SP20 you can get a ticket with a 20% discount. More info: yavaconf.com/en/
Bootiful! 🤩🥳👏
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