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Jaromir Hamala @jerrinot

I play with distributed systems by day and poke various runtimes by night. Engineer @QuestDB, @Hazelcast alumnus. github.com/jerrinot EU Joined December 2009
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Jaromir Hamala retweeted
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Francesco Nigro @forked_franz

a day ago

@AndreyPechkurov @mtopolnik @lemire Still unfinished but you can find an home for this bad boy too github.com/eclipse-vertx/… Still based on the @lemire work, adapted for other types lengths

Jaromir Hamala retweeted
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Andrei Pechkurov @AndreyPechkurov

2 days ago

Today in QuestDB pt2: @mtopolnik made length(varchar) SQL function faster with the following SWAR code. Previously it was using a much slower UTF-8 parsing routine. This reminds me of cool tricks from @lemire blog.

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Jaromir Hamala @jerrinot

a day ago

Woohoo, I can edit front-end code too. I just submitted a highly sophisticated bugfix for #QuestDB web console. It's changing some React code, probably :) Behold: github.com/questdb/ui/pul… :-D

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Jaromir Hamala @jerrinot

2 days ago

"Look ma, I can trade pointer chasing for memory allocations and still win in (some) benchmarks." Seriously, this was quite a rollercoaster. I had a subtle bug causing perf. degradation. After fixing the bug it looks like a win in many situations. 😅😎

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Andrei Pechkurov @AndreyPechkurov

2 days ago

"Look ma, I can trade pointer chasing for memory allocations and still win in (some) benchmarks." Seriously, this was quite a rollercoaster. I had a subtle bug causing perf. degradation. After fixing the bug it looks like a win in many situations. 😅😎

Jaromir Hamala retweeted
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Nyrkio @nyrkio

2 days ago

So let's do a quiz to find out the answer that we're constantly debating and guessing... If you work or hobby on a software project, which one of the following describes your reality wrt performance testing? We run benchmarks...

Jaromir Hamala retweeted
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Glauber Costa @glcst

2 days ago

Last week Vercel announced they were giving up on the edge, and I wrote some words about it. Now I decided to write a full-length article to investigate that in more details. tl;dr: "edge" became a contentious term, but there's still great latency advantage to geo-replicating…

Jaromir Hamala retweeted
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Yann LeCun @ylecun

4 weeks ago

By assuming that technical talent is fungible and interchangeable, a previously-successful engineering company will be run into the ground... ...along with a few of its own products and everyone on board. It's astonishing how certain types of managers will prefer…

pmarca Profile Picture

Marc Andreessen 🇺🇸 @pmarca

4 weeks ago

By assuming that technical talent is fungible and interchangeable, a previously-successful engineering company will be run into the ground... ...along with a few of its own products and everyone on board. It's astonishing how certain types of managers will prefer…

Jaromir Hamala retweeted
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𝙲𝚑𝚊𝚛𝚕𝚎𝚜 𝙲. 𝙼𝚊𝚗𝚗 @CharlesCMann

4 days ago

Amazing that a chip bricked in 46-yr-old Voyager I, preventing it from sending data, and NASA figured out how to split up and reallocate its functions to other hardware, sending code 15 billion miles away (45 hours round trip!)--and Voyager's back online. blogs.nasa.gov/voyager/2024/0…

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Jaromir Hamala @jerrinot

a week ago

I would like to have the same (self-)confidence as the author of this library! :-D

Jaromir Hamala retweeted
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Jaroslav Bahorik @BachorikJ

a week ago

I have had the privilege of hunting a native memory leak recently. Here is my short summary of the journey - jbachorik.github.io/posts/stop-tha…

Jaromir Hamala retweeted
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Christoph Engelbert / Noctarius ツ / エンゲルベルト クリス @noctarius2k

2 weeks ago

Exactly! @java isn't slow if you know what you do, and it hasn't been for more than 2 decades. Just know what you do - like with any other tool! Hands down to @mtopolnik, @jerrinot, @AndreyPechkurov, and everyone else at #QuestDB for an awesome job 🙏🔥 #java

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simplyblock @simplyblock_io

2 weeks ago

Exactly! @java isn't slow if you know what you do, and it hasn't been for more than 2 decades. Just know what you do - like with any other tool! Hands down to @mtopolnik, @jerrinot, @AndreyPechkurov, and everyone else at #QuestDB for an awesome job 🙏🔥 #java

Jaromir Hamala retweeted
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Phil Eaton @eatonphil

2 weeks ago

My senior coworker, Vaijayanti, wrote a great post on how we use Jepsen to validate consistency of the PGD Raft implementation. enterprisedb.com/blog/validatin…

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Jaromir Hamala @jerrinot

2 weeks ago

Does "vpmovzxbd" Scare You? Here's Why it Doesn't Have To! questdb.io/blog/does-vpmo… Another wonderful blog by @mtopolnik 🤓

Jaromir Hamala retweeted
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Andrei Pechkurov @AndreyPechkurov

2 weeks ago

"The labor union of algorithms reported that QuestDB violates the rights of 'binary search algorithm' (BSA) by requiring it to work without utilizing any of its results." - isn't that an intriguing start of a patch description? Jokes aside, OSS rules. github.com/questdb/questd…

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Jaromir Hamala @jerrinot

2 weeks ago

The One Billion Row Challenge in CUDA: from 17m to 17s tspeterkim.github.io/posts/cuda-1brc

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Jaromir Hamala @jerrinot

2 weeks ago

Rocking in a hammock, I realized there are conceptual similarities between Tomasulo's algorithm used in CPUs and the Single Assignment form frequently used in compilers. 💡

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Jaromir Hamala @jerrinot

2 weeks ago

I could not figure out why Wireshark was not capturing traffic generated by a test running inside Intellij Idea. Then I realized Idea was running in AWS on another continent. While Wireshark was local. JetBrains remote dev is so awesome that you can forget it's not your box!

Jaromir Hamala retweeted
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Steven Sklar @sklarsa

2 weeks ago

Check out my appearance on the @simplyblock_io’s Cloud Commute podcast! It’s a great episode where I discuss running data on the cloud, with a focus on time series. Thanks to @jerrinot for making this happen!

simplyblock_io Profile Picture

simplyblock @simplyblock_io

2 weeks ago

Check out my appearance on the @simplyblock_io’s Cloud Commute podcast! It’s a great episode where I discuss running data on the cloud, with a focus on time series. Thanks to @jerrinot for making this happen!

Jaromir Hamala retweeted
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QuestDB @QuestDb

2 weeks ago

Something is brewing 🧑‍🍳 Here's a sneak peek at #QuestDB's JIT compiler, the world of SIMD instructions, and why you shouldn't mix AVX with SSE instructions. By the one and only @mtopolnik Coming soon to your RSS readers!

Jaromir Hamala retweeted
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Gunnar Morling 🌍 @gunnarmorling

3 weeks ago

#1BRC--Nerd Sniping the Java Community The slides from my #JavaLand talk are up. Turns out one can talk much longer than 40min about that topic ;) Highly recommend to also check out the code repo itself to learn more about all the tricks folks used. 👉 speakerdeck.com/gunnarmorling/…

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