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
Add a special annotation @JsExternalTypeArgument for
marking function parameters. The marked parameter
accepts an argument with an external type only.
^KT-57479 Fixed
Test produces as expected OOM exception, but it should not output test
logs into build logs. As TeamCity will parse them and fail because build
logs contains OOM which is false-positive.
Now project level DSL only configures base part of module name, which
latter is enhanced by Kotlin compilation suffix. In this case
'KotlinCompilation.moduleName' is not used.
Additionally,
'KotlinJvmTask.moduleName' usage was deprecated in favor of
'compilerOptions.moduleName'. Though warning is only produced in case
project is using 'org.jetbrains.kotlin.jvm' or
'org.jetbrains.kotlin.android' plugins.
- 'moduleName' is always required to be non-null.
^KT-57688 Fixed
If a simulator test task is configured to disable standalone mode and the simulator isn't booted, the default error message might sound cryptic, so we can give a more user-friendly error message
#KT-38317 Fixed
Move metadata extension with property order from kotlinx.serialization to core
After fix of KT-54792 properties will be deserialized in declaration order
if corresponding class was compiled with modern compiler. But this order
is needed for kotlinx.serialization for binaries compiled with any
kotlin compiler >= 1.4. Since we don't plan to add any extension points
into (de)serialization into FIR, we need to take into account existing
metadata extension from kotlinx.serialization in compiler itself
^KT-57769 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.
Dmitrii Krasnov