Sequence::toSet and Sequence::toList both create a
collection, fill it with elements, and then try to optimize a result
by returning empty, singleton, or the allocated collection depending on
the elements count.
Instead of allocating the collection and then trying to return
an optimized instance it is worth checking the sequence's size
beforehand and return empty/singleton collection when possible.
Proposed change optimize performance of aforementioned functions and
also reduce allocation rate when a sequence consists of 0 or 1 elements.
^KT-55091 fixed
Improve the performance of reversed list view iterators by delegating to
underlying list iterators instead of using implementations provided by
the AbstractList.
Latter use AbstractList::get(index: Int) to implement next() and
previous() methods and depending on the underlying list's implementation
it may lead to worse performance.
The change also improves reversed list views test coverage.
- Introduce ComparableTimeMark interface extending TimeMark,
and TimeSource.WithComparableMarks - a time source that returns such time marks.
- Implement ComparableTimeMark in ValueTimeMark and AbstractLong/DoubleTimeMark classes.
The constructors were introduced in jdk7,
thus their usage was prohibited in Common code.
Now that jvmTarget is 1.8 and jdk8+ is used to compile stdlib,
these constructors are available on all platforms.
* Provide short-circuit methods for contract "EnumEntries contains all
enum entries"
* Make EnumEntries serializable
* Introduce more convenient overload for other backends
#KT-53152
Merge-request: KT-MR-6867
Merged-by: Vsevolod Tolstopyatov <qwwdfsad@gmail.com>
cbrt() is the standard cubic root function that provides several advantages over pow(x, 1.0/3.0):
- Better precision
- Faster
- Behaves better with negative values
This value class wraps Long on JVM and Native thus reducing allocations
in time measurement scenarios when the default monotonic time source is
statically known.
KT-46132
In JS, RegExp can return a match before the specified start index,
if it has matched at that index, but it is in the middle of a surrogate
pair. Account for that when advancing to the next position after
a zero-width match so that it doesn't get to the middle of SP.
Filipp Zhinkin