RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-25 15:07:45 +00:00
Code Issues Activity Actions

LibJS/JIT: Add fast path for cached GetVariable accesses

Browse source 
We can now stay in machine code for environment variable read accesses
as long as they are cached and initialized.

20% speed-up on Octane/zlib.js :^)
This commit is contained in:
Andreas Kling 2023-11-06 15:23:49 +01:00
parent 7826c006c1
commit 1d8ec677a3
6 changed files with 147 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

5
Userland/Libraries/LibJS/Runtime/DeclarativeEnvironment.h
View file

@ -19,6 +19,9 @@ class DeclarativeEnvironment : public Environment {
JS_ENVIRONMENT(DeclarativeEnvironment, Environment);
struct Binding {
static FlatPtr value_offset() { return OFFSET_OF(Binding, value); }
static FlatPtr initialized_offset() { return OFFSET_OF(Binding, initialized); }
DeprecatedFlyString name;
Value value;
bool strict { false };
@ -67,6 +70,8 @@ public:
[[nodiscard]] u64 environment_serial_number() const { return m_environment_serial_number; }
static FlatPtr bindings_offset() { return OFFSET_OF(DeclarativeEnvironment, m_bindings); }
private:
ThrowCompletionOr<Value> get_binding_value_direct(VM&, Binding&, bool strict);
ThrowCompletionOr<void> set_mutable_binding_direct(VM&, Binding&, Value, bool strict);