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a82c56f9f7eb19fa6ac8a09cb7845cf681006f47
ladybird/Libraries/LibJS/Runtime
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Linus Groh a82c56f9f7 LibJS: Speed up IndexedPropertyIterator by computing non-empty indices 
This provides a huge speed-up for objects with large numbers as property
keys in some situation. Previously we would simply iterate from 0-<max>
and check if there's a non-empty value at each index - now we're being
smarter and compute a list of non-empty indices upfront, by checking
each value in the packed elements vector and appending the sparse
elements hashmap keys (for GenericIndexedPropertyStorage).

Consider this example, an object with a single own property, which is a
number increasing by a factor of 10 each iteration:

    for (let i = 0; i < 10; ++i) {
        const o = {[10 ** i]: "foo"};
        const start = Date.now();
        Object.getOwnPropertyNames(o);  // <-- IndexedPropertyIterator
        const end = Date.now();
        console.log(`${10 ** i} -> ${(end - start) / 1000}s`);
    }

Before this change:

    1 -> 0.0000s
    10 -> 0.0000s
    100 -> 0.0000s
    1000 -> 0.0000s
    10000 -> 0.0005s
    100000 -> 0.0039s
    1000000 -> 0.0295s
    10000000 -> 0.2489s
    100000000 -> 2.4758s
    1000000000 -> 25.5669s

After this change:

    1 -> 0.0000s
    10 -> 0.0000s
    100 -> 0.0000s
    1000 -> 0.0000s
    10000 -> 0.0000s
    100000 -> 0.0000s
    1000000 -> 0.0000s
    10000000 -> 0.0000s
    100000000 -> 0.0000s
    1000000000 -> 0.0000s

Fixes #3805.
2020-10-20 08:51:41 +02:00
..
Accessor.h
LibJS: Don't require Interpreter& for constructing an Accessor
2020-09-27 20:26:58 +02:00
Array.cpp
LibJS: Cache commonly used FlyStrings in the VM
2020-10-13 23:57:45 +02:00
Array.h
LibJS: Make native function/property callbacks take VM, not Interpreter
2020-09-27 20:26:58 +02:00
ArrayConstructor.cpp
LibJS: Cache commonly used FlyStrings in the VM
2020-10-13 23:57:45 +02:00
ArrayConstructor.h
LibJS: Remove Interpreter& argument to Function::construct()
2020-09-27 20:26:58 +02:00
ArrayIterator.cpp
Meta+LibHTTP through LibWeb: Make clang-format-10 clean
2020-09-25 21:18:17 +02:00
ArrayIterator.h
LibJS: ArrayIterator needs to mark the array it's iterating
2020-09-08 16:20:34 +02:00
ArrayIteratorPrototype.cpp
LibJS: Cache commonly used FlyStrings in the VM
2020-10-13 23:57:45 +02:00
ArrayIteratorPrototype.h
LibJS: Simplify Cell::initialize()
2020-07-23 17:31:08 +02:00
ArrayPrototype.cpp
LibJS: Cache commonly used FlyStrings in the VM
2020-10-13 23:57:45 +02:00
ArrayPrototype.h
LibJS: Simplify Cell::initialize()
2020-07-23 17:31:08 +02:00
BigInt.cpp
LibJS: Remove a whole bunch of includes of <LibJS/Interpreter.h>
2020-09-27 20:26:58 +02:00
BigInt.h
LibJS: Fix weird self-including header
2020-10-06 18:37:58 +02:00
BigIntConstructor.cpp
LibJS: Cache commonly used FlyStrings in the VM
2020-10-13 23:57:45 +02:00
BigIntConstructor.h
LibJS: Remove Interpreter& argument to Function::construct()
2020-09-27 20:26:58 +02:00
BigIntObject.cpp
LibJS: Remove a whole bunch of includes of <LibJS/Interpreter.h>
2020-09-27 20:26:58 +02:00
BigIntObject.h
LibJS+LibWeb: Add JS::Object::inherits(class_name)
2020-06-21 15:15:52 +02:00
BigIntPrototype.cpp
LibJS: Cache commonly used FlyStrings in the VM
2020-10-13 23:57:45 +02:00
BigIntPrototype.h
LibJS: Simplify Cell::initialize()
2020-07-23 17:31:08 +02:00
BooleanConstructor.cpp
LibJS: Cache commonly used FlyStrings in the VM
2020-10-13 23:57:45 +02:00
BooleanConstructor.h
LibJS: Remove Interpreter& argument to Function::construct()
2020-09-27 20:26:58 +02:00
BooleanObject.cpp
LibJS: Remove a bunch of unnecessary uses of Cell::interpreter()
2020-09-27 20:26:58 +02:00
BooleanObject.h
LibJS+LibWeb: Add JS::Object::inherits(class_name)
2020-06-21 15:15:52 +02:00
BooleanPrototype.cpp
LibJS: Cache commonly used FlyStrings in the VM
2020-10-13 23:57:45 +02:00
BooleanPrototype.h
LibJS: Simplify Cell::initialize()
2020-07-23 17:31:08 +02:00
BoundFunction.cpp
LibJS: Cache commonly used FlyStrings in the VM
2020-10-13 23:57:45 +02:00
BoundFunction.h
LibJS: Move "strict mode" state to the call stack
2020-10-04 17:03:33 +02:00
Cell.cpp
LibJS: Remove Cell::interpreter()
2020-10-04 17:03:33 +02:00
Cell.h
LibJS: Remove Cell::interpreter()
2020-10-04 17:03:33 +02:00
CommonPropertyNames.h
LibJS: Add some more items to CommonPropertyNames that I missed
2020-10-14 00:10:49 +02:00
ConsoleObject.cpp
LibJS: Add some more items to CommonPropertyNames that I missed
2020-10-14 00:10:49 +02:00
ConsoleObject.h
LibJS: Simplify Cell::initialize()
2020-07-23 17:31:08 +02:00
Date.cpp
LibJS: Remove a whole bunch of includes of <LibJS/Interpreter.h>
2020-09-27 20:26:58 +02:00
Date.h
LibJS: Use String::formatted() in various other places
2020-10-04 19:22:02 +02:00
DateConstructor.cpp
LibJS: Cache commonly used FlyStrings in the VM
2020-10-13 23:57:45 +02:00
DateConstructor.h
LibJS: Remove Interpreter& argument to Function::construct()
2020-09-27 20:26:58 +02:00
DatePrototype.cpp
LibJS: Cache commonly used FlyStrings in the VM
2020-10-13 23:57:45 +02:00
DatePrototype.h
Meta+LibHTTP through LibWeb: Make clang-format-10 clean
2020-09-25 21:18:17 +02:00
Error.cpp
LibJS: Cache commonly used FlyStrings in the VM
2020-10-13 23:57:45 +02:00
Error.h
LibJS+LibWeb: Add JS::Object::inherits(class_name)
2020-06-21 15:15:52 +02:00
ErrorConstructor.cpp
LibJS: Cache commonly used FlyStrings in the VM
2020-10-13 23:57:45 +02:00
ErrorConstructor.h
LibJS: Remove Interpreter& argument to Function::construct()
2020-09-27 20:26:58 +02:00
ErrorPrototype.cpp
LibJS: Cache commonly used FlyStrings in the VM
2020-10-13 23:57:45 +02:00
ErrorPrototype.h
Meta+LibHTTP through LibWeb: Make clang-format-10 clean
2020-09-25 21:18:17 +02:00
ErrorTypes.cpp
Meta+LibHTTP through LibWeb: Make clang-format-10 clean
2020-09-25 21:18:17 +02:00
ErrorTypes.h
LibJS: Use String::formatted() for throw_exception() message
2020-10-04 19:22:02 +02:00
Exception.cpp
LibJS: Cache commonly used FlyStrings in the VM
2020-10-13 23:57:45 +02:00
Exception.h
LibJS: Move most of Interpreter into VM
2020-09-27 20:26:58 +02:00
Function.cpp
LibJS: Cache commonly used FlyStrings in the VM
2020-10-13 23:57:45 +02:00
Function.h
LibJS: Move "strict mode" state to the call stack
2020-10-04 17:03:33 +02:00
FunctionConstructor.cpp
LibJS: Cache commonly used FlyStrings in the VM
2020-10-13 23:57:45 +02:00
FunctionConstructor.h
LibJS: Remove Interpreter& argument to Function::construct()
2020-09-27 20:26:58 +02:00
FunctionPrototype.cpp
LibJS: Cache commonly used FlyStrings in the VM
2020-10-13 23:57:45 +02:00
FunctionPrototype.h
LibJS: Simplify Cell::initialize()
2020-07-23 17:31:08 +02:00
GlobalObject.cpp
LibJS: Use allocate_without_global_object for allocating Shapes
2020-10-17 23:47:07 +02:00
GlobalObject.h
LibJS: Prebake the empty object ({}) with a prototype
2020-10-17 23:23:53 +02:00
IndexedProperties.cpp
LibJS: Speed up IndexedPropertyIterator by computing non-empty indices
2020-10-20 08:51:41 +02:00
IndexedProperties.h
LibJS: Speed up IndexedPropertyIterator by computing non-empty indices
2020-10-20 08:51:41 +02:00
IteratorOperations.cpp
LibJS: Cache commonly used FlyStrings in the VM
2020-10-13 23:57:45 +02:00
IteratorOperations.h
LibJS: get_iterator_values() should pass Value to callback (not Value&)
2020-09-08 14:15:13 +02:00
IteratorPrototype.cpp
LibJS: Remove a whole bunch of includes of <LibJS/Interpreter.h>
2020-09-27 20:26:58 +02:00
IteratorPrototype.h
LibJS: Simplify Cell::initialize()
2020-07-23 17:31:08 +02:00
JSONObject.cpp
LibJS: Add some more items to CommonPropertyNames that I missed
2020-10-14 00:10:49 +02:00
JSONObject.h
LibJS: Remove use of Interpreter& in JSONObject code
2020-09-27 20:26:58 +02:00
LexicalEnvironment.cpp
LibJS: Reduce use of Interpreter in LexicalEnvironment
2020-09-29 16:41:28 +02:00
LexicalEnvironment.h
LibJS: Reduce use of Interpreter in LexicalEnvironment
2020-09-29 16:41:28 +02:00
MarkedValueList.cpp
LibJS: Make MarkedValueList inherit from Vector<Value>
2020-09-08 13:43:03 +02:00
MarkedValueList.h
LibJS: Make MarkedValueList inherit from Vector<Value>
2020-09-08 13:43:03 +02:00
MathObject.cpp
LibJS: Cache commonly used FlyStrings in the VM
2020-10-13 23:57:45 +02:00
MathObject.h
LibJS: Simplify Cell::initialize()
2020-07-23 17:31:08 +02:00
NativeFunction.cpp
LibJS: Move "strict mode" state to the call stack
2020-10-04 17:03:33 +02:00
NativeFunction.h
LibJS: Move "strict mode" state to the call stack
2020-10-04 17:03:33 +02:00
NativeProperty.cpp
LibJS: Make native function/property callbacks take VM, not Interpreter
2020-09-27 20:26:58 +02:00
NativeProperty.h
LibJS: Make native function/property callbacks take VM, not Interpreter
2020-09-27 20:26:58 +02:00
NumberConstructor.cpp
LibJS: constexpr some Number object constant values
2020-10-16 17:06:57 +02:00
NumberConstructor.h
LibJS: Remove Interpreter& argument to Function::construct()
2020-09-27 20:26:58 +02:00
NumberObject.cpp
LibJS: Remove a whole bunch of includes of <LibJS/Interpreter.h>
2020-09-27 20:26:58 +02:00
NumberObject.h
LibJS: Add Number.prototype.toString
2020-07-15 18:24:55 +02:00
NumberPrototype.cpp
LibJS: Add some more items to CommonPropertyNames that I missed
2020-10-14 00:10:49 +02:00
NumberPrototype.h
LibJS: Simplify Cell::initialize()
2020-07-23 17:31:08 +02:00
Object.cpp
LibJS: Use allocate_without_global_object for allocating Shapes
2020-10-17 23:47:07 +02:00
Object.h
LibJS: Prebake the empty object ({}) with a prototype
2020-10-17 23:23:53 +02:00
ObjectConstructor.cpp
LibJS: Cache commonly used FlyStrings in the VM
2020-10-13 23:57:45 +02:00
ObjectConstructor.h
LibJS: Remove Interpreter& argument to Function::construct()
2020-09-27 20:26:58 +02:00
ObjectPrototype.cpp
LibJS: Cache commonly used FlyStrings in the VM
2020-10-13 23:57:45 +02:00
ObjectPrototype.h
LibJS: Simplify Cell::initialize()
2020-07-23 17:31:08 +02:00
PrimitiveString.cpp
LibJS: Remove js_string(Interpreter&, ...)
2020-09-27 20:26:58 +02:00
PrimitiveString.h
LibJS: Remove js_string(Interpreter&, ...)
2020-09-27 20:26:58 +02:00
PropertyAttributes.cpp
LibJS: Add Proxy objects
2020-06-06 22:13:01 +02:00
PropertyAttributes.h
Meta+LibHTTP through LibWeb: Make clang-format-10 clean
2020-09-25 21:18:17 +02:00
PropertyName.h
LibJS: Fix PropertyName::from_value() for negative and non-int numbers
2020-10-08 10:02:47 +02:00
ProxyConstructor.cpp
LibJS: Cache commonly used FlyStrings in the VM
2020-10-13 23:57:45 +02:00
ProxyConstructor.h
LibJS: Remove Interpreter& argument to Function::construct()
2020-09-27 20:26:58 +02:00
ProxyObject.cpp
LibJS: Cache commonly used FlyStrings in the VM
2020-10-13 23:57:45 +02:00
ProxyObject.h
LibJS: Remove Interpreter& argument to Function::construct()
2020-09-27 20:26:58 +02:00
ProxyPrototype.cpp
LibJS: Remove a whole bunch of includes of <LibJS/Interpreter.h>
2020-09-27 20:26:58 +02:00
ProxyPrototype.h
LibJS+LibWeb: Add JS::Object::inherits(class_name)
2020-06-21 15:15:52 +02:00
Reference.cpp
LibJS: Use String::formatted() for throw_exception() message
2020-10-04 19:22:02 +02:00
Reference.h
LibJS: Reduce use of Interpreter in Reference
2020-09-29 16:45:39 +02:00
ReflectObject.cpp
LibJS: Cache commonly used FlyStrings in the VM
2020-10-13 23:57:45 +02:00
ReflectObject.h
LibJS: Simplify Cell::initialize()
2020-07-23 17:31:08 +02:00
RegExpConstructor.cpp
LibJS: Cache commonly used FlyStrings in the VM
2020-10-13 23:57:45 +02:00
RegExpConstructor.h
LibJS: Remove Interpreter& argument to Function::construct()
2020-09-27 20:26:58 +02:00
RegExpObject.cpp
LibJS: Use string::formatted() in to_string() functions
2020-10-04 19:22:02 +02:00
RegExpObject.h
LibJS+LibWeb: Add JS::Object::inherits(class_name)
2020-06-21 15:15:52 +02:00
RegExpPrototype.cpp
LibJS: Remove a whole bunch of includes of <LibJS/Interpreter.h>
2020-09-27 20:26:58 +02:00
RegExpPrototype.h
LibJS+LibWeb: Add JS::Object::inherits(class_name)
2020-06-21 15:15:52 +02:00
ScriptFunction.cpp
LibJS: Prebake the empty object ({}) with a prototype
2020-10-17 23:23:53 +02:00
ScriptFunction.h
LibJS: Move "strict mode" state to the call stack
2020-10-04 17:03:33 +02:00
Shape.cpp
LibJS: Use allocate_without_global_object for allocating Shapes
2020-10-17 23:47:07 +02:00
Shape.h
LibJS: Reorganize Shape members to reduce sizeof(Shape) a bit
2020-10-16 16:46:27 +02:00
StringConstructor.cpp
LibJS: Cache commonly used FlyStrings in the VM
2020-10-13 23:57:45 +02:00
StringConstructor.h
LibJS: Remove Interpreter& argument to Function::construct()
2020-09-27 20:26:58 +02:00
StringIterator.cpp
Meta+LibHTTP through LibWeb: Make clang-format-10 clean
2020-09-25 21:18:17 +02:00
StringIterator.h
LibJS: Add StringIterator
2020-07-13 15:07:29 +02:00
StringIteratorPrototype.cpp
LibJS: Cache commonly used FlyStrings in the VM
2020-10-13 23:57:45 +02:00
StringIteratorPrototype.h
LibJS: Simplify Cell::initialize()
2020-07-23 17:31:08 +02:00
StringObject.cpp
LibJS: Remove a whole bunch of includes of <LibJS/Interpreter.h>
2020-09-27 20:26:58 +02:00
StringObject.h
LibJS+LibWeb: Add JS::Object::inherits(class_name)
2020-06-21 15:15:52 +02:00
StringOrSymbol.h
LibJS: Support move semantics for StringOrSymbol
2020-10-15 23:49:53 +02:00
StringPrototype.cpp
LibJS: Cache commonly used FlyStrings in the VM
2020-10-13 23:57:45 +02:00
StringPrototype.h
LibJS: Simplify Cell::initialize()
2020-07-23 17:31:08 +02:00
Symbol.cpp
LibJS: Remove a whole bunch of includes of <LibJS/Interpreter.h>
2020-09-27 20:26:58 +02:00
Symbol.h
LibJS: Use string::formatted() in to_string() functions
2020-10-04 19:22:02 +02:00
SymbolConstructor.cpp
LibJS: Cache commonly used FlyStrings in the VM
2020-10-13 23:57:45 +02:00
SymbolConstructor.h
LibJS: Remove Interpreter& argument to Function::construct()
2020-09-27 20:26:58 +02:00
SymbolObject.cpp
LibJS: Remove a whole bunch of includes of <LibJS/Interpreter.h>
2020-09-27 20:26:58 +02:00
SymbolObject.h
LibJS: Move global symbol map from SymbolObject to Interpreter
2020-07-09 23:29:28 +02:00
SymbolPrototype.cpp
LibJS: Cache commonly used FlyStrings in the VM
2020-10-13 23:57:45 +02:00
SymbolPrototype.h
LibJS: Simplify Cell::initialize()
2020-07-23 17:31:08 +02:00
Uint8ClampedArray.cpp
LibJS: Cache commonly used FlyStrings in the VM
2020-10-13 23:57:45 +02:00
Uint8ClampedArray.h
LibJS+LibWeb: Add JS::Object::inherits(class_name)
2020-06-21 15:15:52 +02:00
Value.cpp
LibJS: Cache commonly used FlyStrings in the VM
2020-10-13 23:57:45 +02:00
Value.h
LibJS: Add Value::is_nullish()
2020-10-02 18:01:27 +02:00
VM.cpp
LibJS: Cache commonly used FlyStrings in the VM
2020-10-13 23:57:45 +02:00
VM.h
LibJS: Cache commonly used FlyStrings in the VM
2020-10-13 23:57:45 +02:00