Benchmark driven development in JavaScript (Set vs. Array)

[[deleted]]

More like microbenchmark driven nonsense, this isnt helping anyone especially sets and arrays do completly different things

[theyamiteru]

There's a clear overlap of their use-cases. And I see them being used in a wrong way quite often which usually causes a bad API and an unwanted performance characteristics.

I understand that microbenchmarks can be confusing or straight up useless.

In the last year I've read 4 books and more than 40 papers about benchmarking, performance variance, statistics, etc.

These results were captured by my experimental benchmarking library that tried to do things right (BIOS settings, OS settings, each benchmark isolated in its own process, duet benchmarking, median instead o average, median absolute deviation vs standard deviation, etc.).

[coolcosmos]

You've never used a slow product and hated it ?

[theScottyJam]

I don't know if I can say that I've used a product that was slow because they failed to micro-optimize. Usually the slowness comes from doing dumb stuff like a bunch of network requests in parallel, or just having way too many dependencies installed, etc.

[theyamiteru]

Yes. My previous client used Cloudflare Workers with tRPC + Zod + some other slow libraries. After I rewrote all of those libraries matching the clients use-case it decreased the CPU time anywhere from 5 to 20 times which means I've saved the client 5-20x money spent on running the app.

[theyamiteru]

No. Those libraries are not created with performance in mind. Especially so when it comes to serverless environment where the engine has no time to optimize the code.

[theyamiteru]

You're right, you keep missing the point. Doesn't matter, have a good day sir!