Two of our most frequently allocated objects are Shape (88 bytes)
and DeclarativeEnvironment (80 bytes). Putting these into 128-byte
cells was quite wasteful, so let's add a more suitable allocator
for them.
We don't need to support more than 2^32 object properties anyway, so
there's no point in using 64-bit property counts.
This small reduction in memory usage makes test-js run ~10% faster on
x86_64 locally.
Using an Optional was extremely wasteful for function objects that don't
even have a bytecode executable.
This allows ECMAScriptFunctionObject to fit in a smaller size class.
Now that AK::Weakable doesn't have a bunch of padding at the end,
let's move the smaller members of JS::Shape to the end, since there's
nothing to fold into at the start.
Many shapes don't have any forward transitions to cache, so we can save
a bunch of memory (and time) by only creating the cache maps when
actually needed.
`convert_nodes_to_single_node` is inside its own file so ChildNode can
include and use it without having to include other headers such as
DOM/Node.h. This is to prevent circular includes.
When I did a fresh build of ports, I got this while building fontconfig:
```
checking for FREETYPE... no
configure: error: Package requirements (freetype2 >= 21.0.15) were not
met:
No package 'freetype2' found
Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.
Alternatively, you may set the environment variables FREETYPE_CFLAGS
and FREETYPE_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.
```
Added the call to generate_available_values(), then realized it is the
exact same as the existing, manually written implementation. So let's
use the new utility.
Intl.NumberFormat is meant to format both Number and BigInt types. To
prepare for formatting BigInt types, this generalizes our NumberFormat
implementation to operate on Value instances rather than doubles. All
arithmetic is moved to static helpers that can now be updated with
BigInt semantics.
