I had not seen LangArena before, so I popped in and … it’s running the crystal code single-threaded, which may explain why Matmul1T has a great score but Matmul4T 8T and 16T do rather horribly so there is some low hanging fruit for optimization there! Before: Matmul1T: OK in 5.598s Matmul4T: OK in…

I had not seen LangArena before, so I popped in and … it’s running the crystal code single-threaded, which may explain why Matmul1T has a great score but Matmul4T 8T and 16T do rather horribly so there is some low hanging fruit for optimization there! Yes, that’s what I thought at first. However…

crystal top1 :tada: :tada: :tada: in Expressiveness metric in my bench: LangArena - Programming Languages Benchmark Comparison second place scala. [Снимок экрана 2026-02-19 в 23.25.37]

Crystal’s expressiveness score is a strong win and a feat that should not be taken lightly. Thanks again @kostya for your huge work on LangArena. I believe LangArena is good for all mainstream programming languages, not only for Crystal, because we can see with more precision how each language beha…

Why Crystal Time Incremental compile almost same as Time cold compile`? @kostya [image]

for all languages measures production build, for crystal this is –release. release known to be not incremental.

I do consider compare Incremental compile but use –release no any means

Comparing --release builds with incremental compilation in Crystal doesn’t make much sense. However, for many other languages—like Go, Java, and TypeScript—incremental compilation does produce a production build, so this is a fair comparison across languages. Rust: 1.72s incremental production buil…

I think we should look at this from the user’s perspective, no one really cares about incremental compilation in release mode, even rust go is more quickly in this case. Users want to see the result of incremental compilation when do development.

Development compilation does make sense, but there’s no data for that right now. And as I mentioned, Go, Java, and TypeScript produce only one type of build — exactly the production build. There’s no separate ‘development’ build. Still, it would be interesting to see those numbers as well.

Maybe add a new column for Development Incremental compile is a good idea.

Crystal in LangArena benchmark

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straight-shoota Split this topic March 13, 2026, 8:05pm 5

5 posts were split to a new topic: LLM-friendliness as a metric: porting 20 languages with an LLM

Topic		Replies	Views
Crystal multithreading support Crystal Contrib	40	2919	March 20, 2026
Very slow build speeds for hello world Help & Support	48	1920	December 25, 2025
Multithreaded Crystal initial thoughts	38	7874	February 21, 2024
Timeline for multithreading support Crystal Contrib	31	2783	September 24, 2024
Build with --release performance is slow than the 2017 crystal version? Help & Support	16	826	June 13, 2022

Crystal in LangArena benchmark

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