builtin.returnError() is really slow while targeting Emscripten | Zig Programming Language | Page 1

merry cove Aug 12, 2024, 9:40 AM

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Profiling graph in browser shows @returnAddress took a lot of time each frame. Even with ReleaseFast optimize enabled.

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My question is, is it possible to disable this thing? jsStackTrace() from Emscripten is pretty slow which I think is the reason.

patent sphinx Aug 12, 2024, 9:44 AM

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-fno-error-tracing or .error_tracing = false,

merry cove Aug 12, 2024, 9:53 AM

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Thanks for the quick reply, is this a zig only option?

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I added .error_tracing = false to my build, but can still see jsStackTrace() from profiling

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I build my app as a static library, and then use emcc to link and produce js/wasm.

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Wow, a lot less jsStackTrace() after the config. The only fews left come from ArenaAllocator. Which is not so annoying any more.

#builtin.returnError() is really slow while targeting Emscripten