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Type: Bug
Resolution: Fixed
Priority: P4
Fix Version/s: 9
Affects Version/s: 8, 9
Component/s: core-libs
Labels:

Subcomponent:
java.util.stream
Resolved In Build:
b117

Issue	Fix Version	Assignee	Priority	Status	Resolution	Resolved In Build
JDK-8224143	openjdk8u222	Tagir Valeev	P4	Resolved	Fixed	b03

Current implementation of parallel unordered Stream.limit() (backed by UnorderedSliceSpliterator) has fixed CHUNK_SIZE 128 (1 << 7) which is the number of elements every parallel task tries to traverse before checking whether enough elements is collected. This is wasteful if limit is less than 128. As limit is known for every parallel task from the very beginning, it's quite easy to lower chunk size in such cases.

backported by

JDK-8224143 Parallel unordered Stream.limit() tries to collect 128 elements even if limit is less

Resolved

duplicates

JDK-8072841 Adjust the buffering size for limit/slice operations on unordered parallel stream pipelines

Closed

relates to

JDK-8190974 Parallel stream execution within a custom ForkJoinPool should obey the parallelism

Resolved

Assignee:: Tagir Valeev

Reporter:: Tagir Valeev

Votes:: 0 Vote for this issue

Watchers:: 4 Start watching this issue

Created:: 2016-04-16 04:03

Updated:: 2019-09-04 02:45

Resolved:: 2016-04-29 18:04

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