Wasmtime GitHub notifications bot (Feb 08 2021 at 16:01): Wasmtime GitHub notifications bot (Feb 08 2021 at 16:01):alexcrichton opened PR #2645 from underscore-setjmp to main:
Apparently on macOS
setjmpmanipulates the process-wide signal mask
which adds a good deal of overhead. We don't actually need this
functionality so this commit switches to using the underscore-prefixed
version of setjmp/longjmp which is defined to not maniuplate the signal
mask. This came out of poking around on #2644 and on macOS locally thi
sdropped the overhead from 721ns to 55ns.I'll note that I'm not sure if the underscore-versions are present in other platforms, but I figure that CI can figure it out here.
Wasmtime GitHub notifications bot (Feb 08 2021 at 16:18):alexcrichton updated PR #2645 from underscore-setjmp to main.
Wasmtime GitHub notifications bot (Feb 08 2021 at 16:26):alexcrichton updated PR #2645 from underscore-setjmp to main.
Wasmtime GitHub notifications bot (Feb 08 2021 at 16:35):alexcrichton updated PR #2645 from underscore-setjmp to main.
Wasmtime GitHub notifications bot (Feb 08 2021 at 16:42):alexcrichton updated PR #2645 from underscore-setjmp to main.
Wasmtime GitHub notifications bot (Feb 08 2021 at 16:48):alexcrichton updated PR #2645 from underscore-setjmp to main.
Wasmtime GitHub notifications bot (Feb 08 2021 at 17:05):cfallin submitted PR Review.
Wasmtime GitHub notifications bot (Feb 08 2021 at 17:05):cfallin submitted PR Review.
Wasmtime GitHub notifications bot (Feb 08 2021 at 17:05):cfallin created PR Review Comment:
tiny nit, but would it be possible to choose other names for the macros rather than aliasing
setjmp/longjmp/jmp_buf? This could be confusing otherwise; best to avoid surprising macro indirections :-)
Wasmtime GitHub notifications bot (Feb 08 2021 at 17:17):alexcrichton updated PR #2645 from underscore-setjmp to main.
Wasmtime GitHub notifications bot (Feb 08 2021 at 18:05):alexcrichton merged PR #2645.
Last updated: Dec 06 2025 at 06:05 UTC