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LibJS/Bytecode: Cache object own property accesses

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The instructions GetById and GetByIdWithThis now remember the last-seen
Shape, and if we see the same object again, we reuse the property offset
from last time without doing a new lookup.

This allows us to use Object::get_direct(), bypassing the entire lookup
machinery and saving lots of time.

~23% speed-up on Kraken/ai-astar.js :^)
This commit is contained in:
Andreas Kling
2023-07-08 17:43:26 +02:00
parent 52cd671163
commit de8e4b1853
8 changed files with 76 additions and 26 deletions
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2
Userland/Libraries/LibJS/Bytecode/Interpreter.cpp
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@@ -193,7 +193,7 @@ ThrowCompletionOr<Value> Interpreter::run(SourceTextModule& module)
return js_undefined();
}
Interpreter::ValueAndFrame Interpreter::run_and_return_frame(Realm& realm, Executable const& executable, BasicBlock const* entry_point, RegisterWindow* in_frame)
Interpreter::ValueAndFrame Interpreter::run_and_return_frame(Realm& realm, Executable& executable, BasicBlock const* entry_point, RegisterWindow* in_frame)
{
dbgln_if(JS_BYTECODE_DEBUG, "Bytecode::Interpreter will run unit {:p}", &executable);