search

JuliaPerf / BenchmarksGame.jl

Other
43 stars 13 forks source link

What arguments should the julia process run with. #17

Closed KristofferC closed 5 years ago

KristofferC commented 5 years ago

Clearly, --check-bounds=no. How about --math-mode=fast? If tests pass, arguably we should run with fast math mode. What do other languages do?

chethega commented 5 years ago

Against --math-mode=fast. This is terribly unsound, considering things like the sinpi issue.

@fastmath is fair and idiomatic. I don't think a lot of real-world projects should use --math-mode=fast. Other languages use fastmath, but this is fair in C: You set the flags per source-file, not per process.

Also against --check-bounds=no. We want to showcase how boundscheck elision works. If Base has an issue where some critical boundscheck cannot be elided from user code, then we need an additional @propagate_inbounds in Base, and should fairly report the slower speed until the PR has landed, either via backport point release or via release of 1.1.

KristofferC commented 5 years ago

Ok, default arguments make sense.

Only need to make sure JULIA_NUM_THREADS is set.

SimonDanisch commented 5 years ago

Maybe O3? But it has actually been a long time since I've seen something actually becoming faster because of it ;)

KristofferC commented 5 years ago

Yeah, after SLP being in O2 Im not sure what O3 does really.