In some cases, we have a timestamp as a double in milliseconds. We then
would convert it to nanoseconds as a BigInt, just to bring it back to a
double for TZDB lookups. Add an overload to avoid this needless round
trip.
Even though the underlying time zone is already cached by LibUnicode, JS
performs additional expensive lookups with that time zone. There's no
need to do those lookups again until the system time zone has changed.
Note that we can currently only use simdutf for Base64 decoding if the
provided stopBeforePartial option is loose, which is the default. There
is an open issue for simdutf to implement strict and stop-before-partial
options. Until then, for those options, we implement a slow decoder that
is written exactly as the spec steps dictate.
See: https://github.com/simdutf/simdutf/issues/440
By checking the lengths and then looking directly at the bytes, the
generated code becomes a lot nicer.
This gives a 1.23x speedup when parsing the JS from x.com
Before this change, we were hard-coding 4 KiB. This meant that systems
with a 16 KiB native page size were wasting 12 KiB per HeapBlock on
nothing, leading to worse locality and more mmap/madvise churn.
We now query the system page size on startup and use that as the
HeapBlock size.
The only downside here is that some of the pointer math for finding the
base of a HeapBlock now has to use a runtime computed value instead of a
compile time constant. But that's a small price to pay for what we get.
- Expose table from console object
- Add new Table log level
- Create a JS object that represents table rows and columns
- Print table as HTML using WebContentConsoleClient
The Initialize* AOs for Intl formatters were removed some time ago, and
the formatter construction steps are now inlined in the constructors
themselves. InitializeNumberFormat was the one remaining initializer we
still had laying around.
This constructor has undergone a handful of editorial changes that we
fell behind on. But we weren't able to take the updates until now due to
a spec bug in those updates. See:
https://github.com/tc39/ecma402/commit/3f029b0
The result is that we can remove the inheritance of Intl::DateTimeFormat
from Unicode::DateTimeFormat; the former now contains the latter as an
internal slot.
The steps have been updated to indicate a few options that should be
defaulted based on locale preferences. Those steps have not yet been
implemented in this patch.
We were never able to implement anything other than a basic, locale-
unaware collator with the JSON export of the CLDR as it did not have
collation data. We can now use ICU to implement collation.
ICU 72 began using non-ASCII spaces in some formatted date-time strings.
Every major browser has found that this introduced major breakage in web
compatibility, as many sites and tools expect ASCII spaces. This patch
removes these non-ASCII spaces in the same manner as the major engines.
Such behavior is also tested by WPT.
The typeof operator has a very small set of possible resulting strings,
so let's make it much faster by caching those strings on the VM.
~8x speed-up on this microbenchmark:
for (let i = 0; i < 10_000_000; ++i) {
typeof i;
}
For performance, rather than slowly incrementing the capacity of the
rope string's buffer, compute an approximate length for that buffer to
be reserved up front.
If no header includes the prototype of a function, then it cannot be
used from outside the translation unit it was defined in. In that case,
it should be marked as `static`, in order to avoid possible ODR
problems, unnecessary exported symbols, and allow the compiler to better
optimize those.
If this warning triggers in a function defined in a header, `inline`
needs to be added, otherwise if the header is included in more than one
TU, it will fail to link with a duplicate definition error.
The reason this diff got so big is that Lagom-only code wasn't built
with this flag even in Serenity times.
The JS::Error types all store their exception messages as a String. So
by using ByteString, we hit the StringView constructor, and end up
allocating the same string twice.
Implement for CreatePerIterationEnvironment for 'for' loops per the Ecma
Standard. This ensures each iteration of a 'for' loop has its own
lexical environment so that variables declared in the loop are scoped to
the current iteration.
