Jaromir Hamala (@jerrinot) 's Twitter Profile
Jaromir Hamala

@jerrinot

I play with distributed systems by day and poke various runtimes by night. Engineer @QuestDB, @Hazelcast alumnus.

ID: 100209115

linkhttps://github.com/jerrinot calendar_today29-12-2009 12:05:27

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Marc Brooker (@marcjbrooker) 's Twitter Profile Photo

I had a great time talking to Ben and Will about software testing and validation at AWS. In this wide-ranging hour we talk deterministic simulation testing, fuzzing, formal methods, the history and future of testing, and much more.

0xAX (@0xax) 's Twitter Profile Photo

And finished to rework 6th part of posts for learning assembly programming for Linux x86_64 - github.com/0xAX/asm/blob/…

John Carmack (@id_aa_carmack) 's Twitter Profile Photo

I had been meaning to comment on Jonathan Blow’s “Why can’t we even conceive of writing a new OS today” post. Coincidentally, I just got an email that opened with: ——————————————— Hey John, 2 years ago I pitched you LIBBA - a dedicated OS for smart glasses. You were

Jaromir Hamala (@jerrinot) 's Twitter Profile Photo

C++ geeks can be funny too! 😅 "Note: this is an early draft. It’s known to be incomplet and incorrekt, and it has lots of bad formatting."

C++ geeks can be funny too! 😅

"Note: this is an early draft. It’s known to be incomplet and incorrekt, and it has lots of bad
formatting."
Jaromir Hamala (@jerrinot) 's Twitter Profile Photo

TIL: async-profiler can create heatmaps showing events over time. You can drill down into arbitrary time intervals with 20ms granularity.

TIL: async-profiler can create heatmaps showing events over time. 

You can drill down into arbitrary time intervals with 20ms granularity.
Jaromir Hamala (@jerrinot) 's Twitter Profile Photo

Tip: If you are on Ubuntu `sudo apt install bcc` and then `sudo biolatency-bpfcc -e 1` gives you nice histograms of I/O device latencies. Powered by eBPF.

Nicolas Frankel 🇺🇦🇬🇪 (@nicolas_frankel) 's Twitter Profile Photo

Last week, I described a gloomy situation: all public TLS certificate providers log your requests. By browsing through the subdomains, one can get their respective IP addresses. My solution caters to my Synology NAS, as it’s the one I’m using. blog.frankel.ch/privacy-subdom…

Dave Cramer 🇨🇦 (@dave_cramer) 's Twitter Profile Photo

#PostgreSQL Are you a maintainer of a driver for Postgres? We would like to get as many as possible together in Vancouver next year at pgconf.dev. Please reach out to me and or spread the word to developers

Andrei Pechkurov (@andreypechkurov) 's Twitter Profile Photo

QuestDB 9.1 is out. While the release includes tons of features like nanosecond timestamp precision, my favorite DX addition is that thanks to Jaromir Hamala it now ships with built-in async-profiler. github.com/questdb/questd…

Jaromir Hamala (@jerrinot) 's Twitter Profile Photo

What S3 API server implementation do people use in *tests* these days? Minio/LocalStack used to be popular, but that's probably overkill for tests? Is there anything simpler and compliant-enough?

Jaromir Hamala (@jerrinot) 's Twitter Profile Photo

Thought I’d seen every kind of race condition. But a bug caused by a race between stdout and stderr? That’s new. Yes, it bit me. Yes, figuring it out was painful. Details: github.com/microsoft/azur…

Glauber Costa (@glcst) 's Twitter Profile Photo

It's funny how last week everyone was dunking on Supabase for their not-an-outage, and replying angrily to a post of mine where I defended them, saying that no, no, they had to have a multi-cloud strategy, deploy to the moon, shard to mars, completely unacceptable... Turns out

CPU Duke (@duke_cpu) 's Twitter Profile Photo

It’s the world’s first #CPU! Almost 54 years ago, on November 15th 1971, #Intel launched the first commercial single-chip microprocessor. With the following tweets, let’s jointly explore the greatest milestone in #computing #history after the invention of the #transistor!

It’s the world’s first #CPU!
Almost 54 years ago, on November 15th 1971, #Intel launched the first commercial  single-chip microprocessor. 
With the following tweets, let’s jointly explore the greatest milestone in #computing #history after the invention of the #transistor!