Andreas Kling
3169747989
LibJS: Emit PutById instead of PutByValue when key is string literal
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Basically convert o["foo"]=x into o.foo=x when emitting bytecode.
These are effectively the same thing, and the latter format opts
into using an inline cache for the property lookups.
2025-04-03 18:47:38 +02:00
Andreas Kling
4426c50a18
LibJS: Emit GetById instead of GetByValue when key is string literal
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Basically convert o["foo"] into o.foo when emitting bytecode. These are
effectively the same thing, and the latter format opts into using an
inline cache for the property lookups.
2025-04-03 18:47:38 +02:00
Andreas Kling
a0bb31f7a0
LibJS: Make async functions & generators faster with helper types
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Instead of returning internal generator results as ordinary JS::Objects
with properties, we now use GeneratorResult and CompletionCell which
both inherit from Cell directly and allow efficient access to state.
1.59x speedup on JetStream3/lazy-collections.js :^)
2025-04-01 02:30:42 +02:00
Lucien Fiorini
f72d87931f
LibJS: Reduce Mov instructions by using preferred destinations
2025-03-28 11:21:12 +00:00
Lucien Fiorini
5707076b9e
LibJS: Optimize away Mov instructions when the source is the destination
2025-03-28 11:21:12 +00:00
Andreas Kling
5ea45da15f
LibJS: Store NewObject result directly in preferred dst if possible
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This avoids a Mov after every object literal.
2025-03-27 19:50:13 +00:00
Andreas Kling
202cbe7df6
LibJS: Constant-fold unary expressions
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!0 and !1 are very common patterns in minified JavaScript, and we should
figure out that they're constants. :^)
2025-03-25 19:14:12 +00:00
Andreas Kling
46a5710238
LibJS: Use FlyString in PropertyKey instead of DeprecatedFlyString
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This required dealing with *substantial* fallout.
2025-03-24 22:27:17 +00:00
Andreas Kling
b971e1ece0
LibJS: Mark locals as outside TDZ immediately after initializing
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This avoids emitting TDZ checks for multiple bindings declared and
referenced within one variable declaration, i.e:
var foo = 0, bar = foo;
In the above case, we'd emit an unnecessary TDZ check for the second
reference to `foo`.
2025-03-21 00:58:34 +01:00
Timothy Flynn
85b424464a
AK+Everywhere: Rename verify_cast to as
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Follow-up to fc20e61e72
2025-01-21 11:34:06 -05:00
Luke Wilde
a588756105
LibJS: Use correct this value for tagged template literals with members
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Required by creepjs, which does Date().split` `[3] to get the current
year.
2025-01-17 17:15:12 +01:00
Timothy Flynn
93712b24bf
Everywhere: Hoist the Libraries folder to the top-level
2024-11-10 12:50:45 +01:00
