The information the user is most interested in is usually in the center,
so we should start loading tiles from the center and move outwards.
Since tiles are loaded in draw order, simply drawing them in this order
achieves the desired effect. The current center-outwards loading
algorithm is a basic spiral algorithm, but others may be evaluated
later.
- Convert to FlatPtr instead of doing pointer arithmetic on a too-large
pointer type in find_min_and_max_block_addresses(). This makes the
range more accurate.
- Untag possible cell pointers in add_possible_value() before doing the
rejection. Otherwise we end up rejecting most pointers since the tags
sit in the highest bits!
This fixes a crash when running the Speedometer benchmark.
Just using Vector::resize() meant that we allocated exact capacity
instead of leaving padding at the end. This patch adds a call to
grow_capacity() before resize(), which ensures that we grow with the
usual extra padding.
This change adds a check to discard pointers that are lower than the
minimum address of all allocated blocks or higher than the maximum
address of all blocks. By doing this we avoid executing plenty of set()
operations on the HashMap in the add_possible_value().
With this change gather_conservative_roots() run 10x times faster in
Speedometer React-Redux-TodoMVC test.
Also, re-order things to match. No behaviour changes.
This reveals quite a few properties that are missing here, or which we
implement somewhat incorrectly.
The following commit will port MIME types to String. Traits<String>
- used in Vector::contains_slow - can't compare String type with char*,
so we need to use StringView instead.
Previously this didn't cause issues because the default flex-factor is
0, but once we only store a flex-factor for FlexibleLength-type
GridSizes, this causes a crash.
There's probably a nicer way of doing this where we don't need to expand
the gray value into a full Vector3, but for now this is good enough.
Makes PDFs written by macOS 13.5.2's "Save as PDF..." feature show up.
We can use `ensure_capacity` for binding vectors if we know their sizes
in advance. This ensures that binding vectors aren't reallocated during
the `function_declaration_instantiation` execution.
With this change, `try_grow_capacity()` and `shrink_to_fit()` are no
longer visible in the `function_declaration_instantiation()` profiles
when running React-Redux-TodoMVC from Speedometer.
If any of binding pattern entry's name is expession
`contains_expression()` should return true.
For example:
```js
function evalInComputedPropertyKey(
{[eval("var x = 'inner'")]: ignored}
) {}
```
`contains_expression()` should return true for the binding param in
this function.
We should initialize jump targets when constructing the jump instruction
instead of doing it later. This was already the case in all construction
sites but one. This first patch converts all those sites to pass final
targets to the constructor directly.
This makes multiple levels of quote actually use different quotation
marks, instead of always the first available pair of them.
Each Layout::Node remembers what the quote-nesting level was before its
content was evaluated, so that we can re-use this number in
`apply_style()`. This is a bit hacky, since we end up converting the
`content` value into a string twice.
`StyleProperties::content()` now takes an initial quote-nesting level,
and returns the final level after that content.
This allows any effects of `content` (eg quotes and counters) to happen
in the right order.
To make it work there are a couple of other changes needed:
- Skip nodes generated by ::before when constructing button layout.
- When in a flex parent, don't merge an inline text node into a previous
one that is generated from a pseudo-element.
This change makes LibJS correctly report a syntax error when a unary
expression is followed by exponentiation, as the spec requires.
Apparently this is due to that expression being ambiguous ordering.
Strangely this check does not seem to apply in the same way for '++' and
'--' for reasons that I don't fully understand. For example
```
let x = 5;
++x ** 2
```
Since `--5` and `++5` on it's own results in a syntax error anyway, it
seems we do not need to perform this exponentiation check in those
places.
Diff Tests:
+6 ✅ -6 ❌
This reduces the minimum size of a basic block from 4 KiB to 0 bytes.
With this change, memory usage at the end of Speedometer is 1.2 GiB,
down from 1.8 GiB.
ImageStyleValue has a visit_edges() method, although it is not a
GC-allocated object. This is necessary because it owns a GC-allocated
ImageRequest that we want to visit, instead of using JS::Handle, to
avoid leaks. In the future, we might want to make StyleValue be
GC-allocated.
For now, this change adds missing visit_edges() calls for objects that
own ImageStyleValue.
Instead of calling out to helper functions for flow control (and then
checking control flags on every iteration), we now simply inline those
ops in the interpreter loop directly.
If we don't have a local unwind context to handle the exception, we can
just return right away. This allows us to remove one check from the
inner loop.
Nuke all the per-instruction bounds checking when iterating instructions
by using raw pointers instead of indexing into a ReadonlyBytes.
The interpreter loop already checks that we're in-bounds anyway.
