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LibJS: Inline fast case for Value::to_{boolean,number,numeric,primitive}

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These functions all have a very common case that can be dealt with a
very simple inline check, often avoiding the need to call an out-of-line
function. This patch moves the common case to inline functions in a new
ValueInlines.h header (necessary due to header dependency issues..)

8% speed-up on the entire Kraken benchmark :^)
This commit is contained in:
Andreas Kling 2023-10-06 17:54:21 +02:00
parent 42d80aab06
commit 65717e3b75
53 changed files with 111 additions and 8 deletions
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13
Userland/Libraries/LibJS/Runtime/Value.cpp
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@ -39,6 +39,7 @@
#include <LibJS/Runtime/Utf16String.h>
#include <LibJS/Runtime/VM.h>
#include <LibJS/Runtime/Value.h>
#include <LibJS/Runtime/ValueInlines.h>
#include <math.h>
namespace JS {
@ -453,7 +454,7 @@ ThrowCompletionOr<Utf16String> Value::to_utf16_string(VM& vm) const
}
// 7.1.2 ToBoolean ( argument ), https://tc39.es/ecma262/#sec-toboolean
bool Value::to_boolean() const
bool Value::to_boolean_slow_case() const
{
if (is_double()) {
if (is_nan())
@ -490,7 +491,7 @@ bool Value::to_boolean() const
}
// 7.1.1 ToPrimitive ( input [ , preferredType ] ), https://tc39.es/ecma262/#sec-toprimitive
ThrowCompletionOr<Value> Value::to_primitive(VM& vm, PreferredType preferred_type) const
ThrowCompletionOr<Value> Value::to_primitive_slow_case(VM& vm, PreferredType preferred_type) const
{
// 1. If input is an Object, then
if (is_object()) {
@ -585,12 +586,8 @@ ThrowCompletionOr<NonnullGCPtr<Object>> Value::to_object(VM& vm) const
}
// 7.1.3 ToNumeric ( value ), https://tc39.es/ecma262/#sec-tonumeric
FLATTEN ThrowCompletionOr<Value> Value::to_numeric(VM& vm) const
FLATTEN ThrowCompletionOr<Value> Value::to_numeric_slow_case(VM& vm) const
{
// OPTIMIZATION: Fast path for when this value is already a number.
if (is_number())
return *this;
// 1. Let primValue be ? ToPrimitive(value, number).
auto primitive_value = TRY(to_primitive(vm, Value::PreferredType::Number));
@ -688,7 +685,7 @@ double string_to_number(StringView string)
}
// 7.1.4 ToNumber ( argument ), https://tc39.es/ecma262/#sec-tonumber
ThrowCompletionOr<Value> Value::to_number(VM& vm) const
ThrowCompletionOr<Value> Value::to_number_slow_case(VM& vm) const
{
VERIFY(!is_empty());