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LibJS: Add the "fast non-local access" optimization to the bytecode VM

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The GetVariable bytecode op now caches environment coordinates for fast
cross-scope variable lookup.
This commit is contained in:
Andreas Kling 2021-10-24 15:36:24 +02:00
parent da98212001
commit 715e7fada8
2 changed files with 24 additions and 3 deletions
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3
Userland/Libraries/LibJS/Bytecode/Op.h
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@ -16,6 +16,7 @@
#include <LibJS/Bytecode/StringTable.h>
#include <LibJS/Heap/Cell.h>
#include <LibJS/Runtime/Environment.h>
#include <LibJS/Runtime/EnvironmentCoordinate.h>
#include <LibJS/Runtime/Value.h>
namespace JS::Bytecode::Op {
@ -310,6 +311,8 @@ public:
private:
IdentifierTableIndex m_identifier;
Optional<EnvironmentCoordinate> mutable m_cached_environment_coordinate;
};
class GetById final : public Instruction {