Andreas Kling 5b060da4f4 LibJS: Cache symbolicated stack frames on ExecutionContext ...

Instead of re-symbolicating entire stacks from scratch every time
we want a JS VM backtrace, we now use the ExecutionContext object as
cache storage via a new CachedSourceRange object.

This means that once a stack frame has been symbolicated, we don't
have to resymbolicate it again (unless the program counter moves
within that stack frame).

This drastically reduces time spent in symbolication in some WPT tests.

2024-10-14 09:51:13 +02:00

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