Doug

Software engineer interested in high performance Java, Rust, distributed latency sensitive realtime systems... coffee and penguins

@[email protected]

[Mara @m_ou_se]

🦀📕 All chapters of my book, Rust Atomics and Locks, are now freely available online: https://t.co/EgEhl3pSLO

Enjoy! ✨

[Mara @m_ou_se]

⚛️📋 I made an overview of the ARMv8 and x86-64 machine instructions for all the common atomic operations:

[Doug @switchology]

@ceeoreo_ @carolynvs I suspect you're good as is. A senior engineer at my firm once impressed upon me the importance of showing intellectual honesty and being upfront about your struggles, some problems are just hard y'know and being honest helps you to be relatable to all.

[Mara @m_ou_se]

🦀 New (cursed) Rust proc macro! This one expands to whatever `use` statements you need to make the rest of the code compile. 🪄 😄

[Tivadar Danka @TivadarDanka]

Entropy is not the easiest thing to understand.

It is rumored to describe something about information and disorder, but it is unclear why.

What do logarithms and sums have to do with the concept of information?

Let me explain!

↓ A thread. ↓

[Doug @switchology]

@JeremyCom I write broken English for hours and hope it works first time

[Doug @switchology]

@drewwagar "The unwatered" Snuggles.

[Nitsan "Yak" Wakart @nitsanw]

@headius I hope there will be a silver lining to the forced WFH where people and businesses find out that this is a viable way to reduce commuting (traffic/time waste/pollution) and improve diversity. IMO It doesn't need to work for everyone all of the time, to prove beneficial.

[Doug @switchology]

@nitsanw Yeah apparently so, but why would you do something so insane? The sun is getting to you.

[Doug @switchology]

https://t.co/j0z5AHl1A0

Old article but compressed oops can be a gotcha!

[Doug @switchology]

@buhblb @Spotify @Tool Preach it brother

[Andrei Pangin @AndreiPangin]

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.

[Charles Oliver Nutter @headius]

People fighting against "gender identity" on biological grounds need to get better hobbies. I don't care if you identify as a watermelon as long as you run tests before you submit your PR.

[Doug @switchology]

Recently we were looking at why a process, whose parent exited and was reparented appears to run but crashes immediately after writing to stdout.. anyway I found this article on how the TTY driver works. I would thoroughly recommend it: https://t.co/ndn8rdJlCU

[Doug @switchology]

One of the best things I've learnt professionally, that has been applied to my hobby projects, is ruthless scoping, followed by descoping, and more descoping until all that remains is the minimal effort necessary for a project!

[Brendan Gregg @brendangregg]

Flame graphs are now also in IntelliJ, with integration with Java Flight Recorder and Async profiler https://t.co/Su4Eab7Cul

[Doug @switchology]

https://t.co/m3bFKeQfTN

Great article on various classes of performance optimisation. A new one to me was bypass delays that come into affect when switching between int, floating point and vector arithmetic. Agner Fog has more info https://t.co/ZdF0IWVeTH

[Doug @switchology]

@ValtoVipul A JDK and a SDK walk into a bar..

.. Yes I did mean JDK, fixed & thanks!

[Doug @switchology]

For anyone looking to compile JDK 11 or 12 hsdis (the hotspot disassembler) on Linux: https://t.co/iFOHk9fm3s