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LibJS: Add a number-indexed property storage to all Objects

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Objects can have both named and indexed properties. Previously we kept
all property names as strings. This patch separates named and indexed
properties and splits them between Object::m_storage and m_elements.

This allows us to do much faster array-style access using numeric
indices. It also makes the Array class much less special, since all
Objects now have number-indexed storage. :^)
This commit is contained in:
Andreas Kling
2020-04-06 16:53:02 +02:00
parent 65dd9d5ad3
commit 90ba0145f6
6 changed files with 69 additions and 50 deletions
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13
Userland/js.cpp
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@@ -117,11 +117,22 @@ static void print_array(const JS::Array& array, HashTable<JS::Object*>& seen_obj
static void print_object(const JS::Object& object, HashTable<JS::Object*>& seen_objects)
{
fputs("{ ", stdout);
for (size_t i = 0; i < object.elements().size(); ++i) {
printf("\"\033[33;1m%zu\033[0m\": ", i);
print_value(object.elements()[i], seen_objects);
if (i != object.elements().size() - 1)
fputs(", ", stdout);
}
if (!object.elements().is_empty() && object.shape().property_count())
fputs(", ", stdout);
size_t index = 0;
for (auto& it : object.shape().property_table()) {
printf("\"\033[33;1m%s\033[0m\": ", it.key.characters());
print_value(object.get_direct(it.value.offset), seen_objects);
if (index != object.shape().property_table().size() - 1)
if (index != object.shape().property_count() - 1)
fputs(", ", stdout);
++index;
}