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LibJS+LibWeb: Parse modules off the main thread

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Use the parse_off_thread() helper to submit
parse_program(ProgramType::Module) to the ThreadPool for parsing
on a worker thread. Bounce back to the main thread to compile and
deliver the result via deferred_invoke.

Falls back to synchronous parsing when the Rust pipeline is
unavailable (LIBJS_CPP=1 or LIBJS_COMPARE_PIPELINES=1).
This commit is contained in:
Andreas Kling
2026-02-27 23:44:53 +01:00
committed by Andreas Kling
parent 3f4d3d6108
commit 4c1e2aeb54
Notes: github-actions[bot] 2026-03-06 12:07:23 +00:00 
Author: https://github.com/awesomekling
Commit: https://github.com/LadybirdBrowser/ladybird/commit/4c1e2aeb549
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/8211
Reviewed-by: https://github.com/ADKaster
Reviewed-by: https://github.com/Zaggy1024
Reviewed-by: https://github.com/alimpfard
3 changed files with 28 additions and 7 deletions
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2
Libraries/LibWeb/HTML/Scripting/ModuleScript.h
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@@ -36,7 +36,7 @@ public:
virtual ~JavaScriptModuleScript() override;
static WebIDL::ExceptionOr<GC::Ptr<JavaScriptModuleScript>> create(ByteString const& filename, StringView source, JS::Realm&, URL::URL base_url);
static WebIDL::ExceptionOr<GC::Ptr<JavaScriptModuleScript>> create_from_pre_parsed(ByteString const& filename, StringView source, JS::Realm&, URL::URL base_url, RustParsedProgram* parsed);
static WebIDL::ExceptionOr<GC::Ptr<JavaScriptModuleScript>> create_from_pre_parsed(ByteString const& filename, NonnullRefPtr<JS::SourceCode const> source_code, JS::Realm&, URL::URL base_url, RustParsedProgram* parsed);
enum class PreventErrorReporting {
Yes,