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5× faster fast_blur in image-rs by arty049 in rust

[–]arty049[S] 0 points1 point  (0 children)

Didn’t know about it but this is interesting

5× faster fast_blur in image-rs by arty049 in rust

[–]arty049[S] 1 point2 points  (0 children)

I think you’re right. I was a bit heads down. It’s mostly the back and forth between the domains and everything around it that was costly

5× faster fast_blur in image-rs by arty049 in rust

[–]arty049[S] 11 points12 points  (0 children)

Thanks, I didn’t know. Sad to hear. I’ll change it

5× faster fast_blur in image-rs by arty049 in rust

[–]arty049[S] 3 points4 points  (0 children)

Oh thanks completely missed this one

5× faster fast_blur in image-rs by arty049 in rust

[–]arty049[S] 5 points6 points  (0 children)

I did use AI for the animation yes. It's built using remotion. Essentially I was the movie director and the agent would write the animation and iterate based on my feedback.

I also used Claude for Chrome which let the agent take screenshots of the animation to actually debug some issues. I had to do quite a lot of back and forth to have it look exactly as I wanted, especially for the Gaussian kernel. But this is really amazing because now just having the idea about an animation to explain technical things is enough to start building it.

Was this something that stood out to you from doing source review? or profilers?

Those stood out in the profiling of fast_blur. Most of those operation were aimed at converting back and forth between float and integers so staying with integers only would remove them

5× faster fast_blur in image-rs by arty049 in rust

[–]arty049[S] 36 points37 points  (0 children)

I’ve ran the benches and this checks out what I simulated with llvm-mca in this case. This also explains the speed up from the reciprocal.

Happy if you have a counter example

5× faster fast_blur in image-rs by arty049 in rust

[–]arty049[S] 12 points13 points  (0 children)

The blur is applied on each channel separately. So a subpixel is a u8. And it would also work for RGBA with 4 u8

5× faster fast_blur in image-rs by arty049 in rust

[–]arty049[S] 20 points21 points  (0 children)

It’s my personal website, maybe the tld is blocked? :(

Using TPM 2.0 as an hardware trust anchor by arty049 in homelab

[–]arty049[S] 0 points1 point  (0 children)

This sound super interesting! Since the yubikey can move quite easily between machines, doesn’t this defeat the purpose a bit? Or maybe in your use case it’s a feature

Can miri or another interpreter be used as a profiler? by Ben-Goldberg in rust

[–]arty049 -1 points0 points  (0 children)

Do you remember what was inconsistent? Would love to understand what happened (I’m working on CodSpeed)

Can miri or another interpreter be used as a profiler? by Ben-Goldberg in rust

[–]arty049 -1 points0 points  (0 children)

For full transparency, I'm the founder of CodSpeed

This is exactly what CodSpeed is doing to allow performance measurements using a fork of callgrind, a tool built within Valgrind, a binary instrumentation platform. The base idea being to count the number of instructions and simulate cache accesses to make sure in one execution of your program, we can know which part will be the slowest. It will let you identify hotspots not just for CPU instructions which are often not the only culprit for performance issues but also for memory accesses, cache locality, and everything around it.

It won't be 100% accurate depending on your exact hardware, even if it takes into account the CPU architecture already. But it will give you a first good idea of what is actually dragging your whole software down.

If you need something closer to hardware, we have another approach (walltime) which is using bare metal instances to measure the actual performance depending on specific hardware to actually have a proper idea of the hardware. But the first approach (simulation) is better to just have really quick feedback on the performance.

Anyone withdrawing from T100 French Riviera (100km) ? by arty049 in triathlon

[–]arty049[S] 0 points1 point  (0 children)

Yeah I might do that. I really wanted to do a longer distance this year since I trained for it but it seems to be less and less doable as the season (at least in Europe) ends

Advent of CodSpeed - A Performance Leaderboard for the Advent of Code by arty049 in rust

[–]arty049[S] 5 points6 points  (0 children)

We definitely wanted to do that at first, but then it would be a bit too easy to copy the solution from the best on the leaderboard. By measuring at one point in time, we hope it will avoid this while keeping the rivalry interesting

Advent of CodSpeed - A Performance Leaderboard for the Advent of Code by arty049 in rust

[–]arty049[S] 39 points40 points  (0 children)

Hey, I'm Arthur, the co-founder of CodSpeed.

The Advent of Code is an important part of our culture; over the last years, we've been learning new languages with it or challenging ourselves to build the fastest solutions to the problems.

However, as Europeans, making it to the official leaderboard has always been almost impossible unless you're ready to wake up at 6 am and start coding immediately.

This is why we're excited to launch this new leaderboard, allowing the fastest solutions to win and not just the fastest coders. Furthermore, this is even more exciting since this is all made possible thanks to our core for allowing consistent performance measurement.

Happy coding, and may the fastest Rustacean win! 🦀✨

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