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LibWeb: Add cached global attribute name FlyStrings

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Instead of creating extremely common FlyStrings like "id" and "class"
on demand every time they are needed, we now have AttributeNames.h,
which provides Web::HTML::AttributeNames::{id,class_}

This avoids a bunch of string allocations during selector matching.
This commit is contained in:
Andreas Kling 2020-05-26 23:27:22 +02:00
parent 5069d380a8
commit 82444048de
7 changed files with 102 additions and 5 deletions
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5
Libraries/LibWeb/Bindings/ElementWrapper.cpp
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@ -31,6 +31,7 @@
#include <LibJS/Runtime/PrimitiveString.h>
#include <LibJS/Runtime/Value.h>
#include <LibWeb/Bindings/ElementWrapper.h>
#include <LibWeb/DOM/AttributeNames.h>
#include <LibWeb/DOM/Element.h>
namespace Web {
@ -131,7 +132,7 @@ void ElementWrapper::inner_html_setter(JS::Interpreter& interpreter, JS::Value v
JS::Value ElementWrapper::id_getter(JS::Interpreter& interpreter)
{
if (auto* impl = impl_from(interpreter))
return JS::js_string(interpreter, impl->attribute("id"));
return JS::js_string(interpreter, impl->attribute(HTML::AttributeNames::id));
return {};
}
@ -141,7 +142,7 @@ void ElementWrapper::id_setter(JS::Interpreter& interpreter, JS::Value value)
auto string = value.to_string(interpreter);
if (interpreter.exception())
return;
impl->set_attribute("id", string);
impl->set_attribute(HTML::AttributeNames::id, string);
}
}