ladybird/Libraries/LibJS/Bytecode
Andreas Kling 183c847c80
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LibJS: Cache PutById to setters in the prototype chain
This is *extremely* common on the web, but barely shows up at all in
JavaScript benchmarks.

A typical example is setting Element.innerHTML on a HTMLDivElement.
HTMLDivElement doesn't have innerHTML, so it has to travel up the
prototype chain until it finds it.

Before this change, we didn't cache this at all, so we had to travel
the prototype chain every time a setter like this was used.

We now use the same mechanism we already had for GetBydId and cache
PutById setter accesses in the prototype chain as well.

1.74x speedup on MicroBench/setter-in-prototype-chain.js
2025-05-05 15:21:43 +02:00
..
ASTCodegen.cpp LibJS: Optimize reading known-to-be-initialized var bindings 2025-05-04 02:31:18 +02:00
BasicBlock.cpp Everywhere: Hoist the Libraries folder to the top-level 2024-11-10 12:50:45 +01:00
BasicBlock.h LibGC+Everywhere: Factor out a LibGC from LibJS 2024-11-15 14:49:20 +01:00
Builtins.cpp Everywhere: Hoist the Libraries folder to the top-level 2024-11-10 12:50:45 +01:00
Builtins.h LibJS: Add builtin for Math.random() 2025-04-03 13:56:39 +02:00
CodeGenerationError.cpp Everywhere: Hoist the Libraries folder to the top-level 2024-11-10 12:50:45 +01:00
CodeGenerationError.h Everywhere: Hoist the Libraries folder to the top-level 2024-11-10 12:50:45 +01:00
Executable.cpp LibGC+Everywhere: Factor out a LibGC from LibJS 2024-11-15 14:49:20 +01:00
Executable.h LibJS: Add new operand type for function arguments 2025-04-26 11:02:29 +02:00
Generator.cpp LibJS: Add SetGlobal bytecode instruction for cached global writes 2025-05-04 01:58:57 +02:00
Generator.h LibJS: Skip allocating locals for arguments that allowed to be local 2025-04-26 11:02:29 +02:00
IdentifierTable.cpp LibJS: Use FlyString in PropertyKey instead of DeprecatedFlyString 2025-03-24 22:27:17 +00:00
IdentifierTable.h LibJS: Make Optional<IdentifierTableIndex> use less space 2025-03-27 19:50:13 +00:00
Instruction.cpp LibJS: Remove unused InstructionStreamIterator::source_code getter 2025-04-16 10:41:44 -06:00
Instruction.h LibJS: Optimize reading known-to-be-initialized var bindings 2025-05-04 02:31:18 +02:00
Interpreter.cpp LibJS: Cache PutById to setters in the prototype chain 2025-05-05 15:21:43 +02:00
Interpreter.h Revert "LibJS: Add StackFrame to avoid indirection in VM register access" 2025-04-29 16:08:42 +02:00
Label.cpp Everywhere: Hoist the Libraries folder to the top-level 2024-11-10 12:50:45 +01:00
Label.h Everywhere: Hoist the Libraries folder to the top-level 2024-11-10 12:50:45 +01:00
Op.h LibJS: Optimize reading known-to-be-initialized var bindings 2025-05-04 02:31:18 +02:00
Operand.h LibJS: Add new operand type for function arguments 2025-04-26 11:02:29 +02:00
RegexTable.cpp Everywhere: Hoist the Libraries folder to the top-level 2024-11-10 12:50:45 +01:00
RegexTable.h LibJS: Use u32 for RegexTableIndex 2025-04-06 02:05:27 +02:00
Register.h LibJS: Remove unused bytecode VM register reservation 2025-04-30 09:38:40 +02:00
ScopedOperand.cpp Everywhere: Hoist the Libraries folder to the top-level 2024-11-10 12:50:45 +01:00
ScopedOperand.h Everywhere: Hoist the Libraries folder to the top-level 2024-11-10 12:50:45 +01:00
StringTable.cpp LibJS: Make Optional<StringTableIndex> use less space 2025-04-06 02:05:27 +02:00
StringTable.h LibJS: Make Optional<StringTableIndex> use less space 2025-04-06 02:05:27 +02:00