[ARROW-3495] [Java] Optimize bit operations performance

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 0.11.0
• Component/s: Java
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/19814
• Assignee: Unassigned
• Reporter: Li Jin
• Created: 11/Oct/18 15:44
• Updated: 11/Jan/23 07:27

Description

From atrivedi's benchmark finding:

2) Materialize values from Validity and Value direct buffers instead of
calling getInt() function on the IntVector. This is implemented as a new
Unsafe reader type (
https://github.com/animeshtrivedi/benchmarking-arrow/blob/master/src/main/java/com/github/animeshtrivedi/benchmark/ArrowReaderUnsafe.java#L31
)

3) Optimize bitmap operation to check if a bit is set or not (
https://github.com/animeshtrivedi/benchmarking-arrow/blob/master/src/main/java/com/github/animeshtrivedi/benchmark/ArrowReaderUnsafe.java#L23
)

Issue Links

• links to: GitHub Pull Request #5930

Sub-Tasks

• [Java] Remove Long.bitCount with simple bitmap operations: Resolved