mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2025-06-01 16:02:53 +00:00
LibJS/Bytecode: Flatten bytecode to a contiguous representation
Instead of keeping bytecode as a set of disjoint basic blocks on the malloc heap, bytecode is now a contiguous sequence of bytes(!) The transformation happens at the end of Bytecode::Generator::generate() and the only really hairy part is rerouting jump labels. This required solving a few problems: - The interpreter execution loop had to change quite a bit, since we were storing BasicBlock pointers all over the place, and control transfer was done by redirecting the interpreter's current block. - Exception handlers & finalizers are now stored per-bytecode-range in a side table in Executable. - The interpreter now has a plain program counter instead of a stream iterator. This actually makes error stack generation a bit nicer since we just have to deal with a number instead of reaching into the iterator. This yields a 25% performance improvement on this microbenchmark: for (let i = 0; i < 1_000_000; ++i) { } But basically everything gets faster. :^)
This commit is contained in:
parent
c2d3d9d1d4
commit
f6aee2b9e8
Notes:
sideshowbarker
2024-07-17 02:22:23 +09:00
Author: https://github.com/awesomekling
Commit: f6aee2b9e8
Pull-request: https://github.com/SerenityOS/serenity/pull/24240
Reviewed-by: https://github.com/Hendiadyoin1
Reviewed-by: https://github.com/trflynn89 ✅
21 changed files with 392 additions and 172 deletions
|
@ -717,7 +717,7 @@ ThrowCompletionOr<void> SourceTextModule::execute_module(VM& vm, GCPtr<PromiseCa
|
|||
else {
|
||||
auto executable = maybe_executable.release_value();
|
||||
|
||||
auto result_and_return_register = vm.bytecode_interpreter().run_executable(*executable, nullptr);
|
||||
auto result_and_return_register = vm.bytecode_interpreter().run_executable(*executable, {});
|
||||
if (result_and_return_register.value.is_error()) {
|
||||
result = result_and_return_register.value.release_error();
|
||||
} else {
|
||||
|
|
Loading…
Add table
Add a link
Reference in a new issue