71150ffe56perf: have ErrorThrower lazy-lookup the current isolate ErrorThrower's default constructor is marked as "should rarely if ever be used" because it's expensive to call. Unfortunately, nearly every instance of ErrorThrower comes as an argument in gin_helper's JS-->C++ function marshalling where a thrower is default-constructed and then populated in gin_helper::GetNextArgument() with an assignment operator to a temporary ErrorThrower constructed with the gin::Arguments' isolate. tldr: most of the time we use the slow constructor first, then throw that work away unused by overwriting with a fast-constructed one. This refactor avoids that cost by deferring the expensive work to `ErrorThrower::isolate()`, where it happens only as a fallback iff isolate_ hasn't been set. Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com> Co-authored-by: Charles Kerr <charles@charleskerr.com> |
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