Paulius Gasparavicius

Infra HFT @ @GSR_io - Writing about systems, performance, and how computers actually work
· Rust · Linux · latency · architecture

[Paulius Gasparavicius @pauliusgaa]

It’s official! I got my #AWS Solutions Architect Associate certification! What’s next? #Cloud #CloudComputing #dev #devops #coding

[Paulius Gasparavicius @pauliusgaa]

@zephyr_z9 Does this mean the end of fixed subagents (like in Claude or Codex) and a shift to a main process that spins up agents on the fly to work in parallel, using RL rewards?

[Paulius Gasparavicius @pauliusgaa]

@andreasklinger @vonderleyen @euinc_petition Huge if true.
But timelines matter more than slide decks.

[Paulius Gasparavicius @pauliusgaa]

tldr SWIM: O(n) membership protocol. Each node probes one random peer per τ interval. Timeout → k indirect probes via random members. Still no ACK → suspect state → timeout → dead. Incarnation numbers resolve conflicting state claims. Dissemination piggybacks on PING/ACK/PING-REQ. No protocol phase separation.
https://t.co/NfeKx0EOSY

[Paulius Gasparavicius @pauliusgaa]

one day you start your own OS engineering, next you’re suddenly reading Intel Systems manual..

[Paulius Gasparavicius @pauliusgaa]

@devdotsasha @ky__zo Just found this actually https://t.co/x9cYPdAEj8. Amazing UI working both on desktop+phone and free version is integrated by git, looking good

[Paulius Gasparavicius @pauliusgaa]

thought the AGED ETF was a longevity play but then you see booking .com in there. the boomer cure for aging is apparently a villa in portugal lol

[Paulius Gasparavicius @pauliusgaa]

@rauchg This is why the best AI users aren't necessarily the best engineers - they're people with deep domain expertise who now have infinite leverage. The technique is knowing what to build, not how to build it.

[Paulius Gasparavicius @pauliusgaa]

@zoink The lifespan heuristic is sharp. Throwaway scripts, one-off automations - let AI go wild. Production systems touching money or users? That's where the human judgment tax is worth paying.

[Paulius Gasparavicius @pauliusgaa]

@cgtwts we went from short attention span → to zero patience → to straight-up refusing to think for even a moment before hitting enter on our prompts

[Paulius Gasparavicius @pauliusgaa]

@geoffreylitt looks nice, watching the colours shift and crash is kinda hypnotic

[Paulius Gasparavicius @pauliusgaa]

https://t.co/NNJE6PAl7M

[Shane Cashman @ShaneCashman]

They sentenced Maduro to a six hour podcast with Lex Fridman.

[Paulius Gasparavicius @pauliusgaa]

@Eden_Eats You might be onto something here

[Paulius Gasparavicius @pauliusgaa]

@fejau_inc Closely monitoring

[fejau @fejau_inc]

Never disrespect the masculine urge of those who monitor the situation

Monitoring the situation is one of life’s great pleasures for those that love to hyper fixate on things

[Paulius Gasparavicius @pauliusgaa]

You can read more about how it works here https://t.co/zJc3bolvj2

[Paulius Gasparavicius @pauliusgaa]

Ever wonder how billions of devices share the internet without it collapsing?

TCP congestion control. A 36-year-old algorithm running on every device, constantly asking: "how fast can I go?"

Built a TUI to visualize the famous "sawtooth" pattern:
#rust #Linux #SoftwareEngineering

[Paulius Gasparavicius @pauliusgaa]

If interested, including source code here https://t.co/iRpU48aZYz

[Paulius Gasparavicius @pauliusgaa]

If you care about latency, throughput, or tail performance, this matters. Most async runtimes and networking stacks are built on one of these as their backbone:
• epoll - readiness-based, kernel tells you when to act - you still do the syscall
• io_uring - submission/completion-based, you submit work up front - kernel returns completed results

[Paulius Gasparavicius @pauliusgaa]

@tenobrus can't remember when was the last time I searched for a question/issue in stack overflow rather than llm..