[Java] Experiment with performance difference of avoiding the use of Avro Decoder
- Dominant language
- Java
- Stars
- 94
- Forks
- 152
- Avg merge
- 3d 16h
- Merged PRs (30d)
- 11
Description
It has been posited that the Decoder object (and on-heap work in general) is potentially slow for decoding.
The scope of this Jira is to add a new method that instead of consuming from Decoder, consumes directly from a ByteBuffer. In order to this we there needs to be utility classes for zig-zag decoding (one might existing in avro) from a ByteBuffer.
This is esentially rewriting logic in the decoder to work directly against a bytebuffer and then measure if there is a meaningful performance impact.
**Reporter**: [Micah Kornfield](https://issues.apache.org/jira/browse/ARROW-6593) / @emkornfield
#### Related issues:
- [[Java] Add support for skipping decoding of columns/field in Avro converter](https://github.com/apache/arrow/issues/22949) (is a clone of)
**Note**: *This issue was originally created as [ARROW-6593](https://issues.apache.org/jira/browse/ARROW-6593). Please see the [migration documentation](https://github.com/apache/arrow/issues/14542) for further details.*
Contributor guide
Research direction
Start by locating the Java Avro conversion code that consumes Decoder and review any existing Avro zig-zag decoding utilities. The work is complete when ByteBuffer-based decoding and its utility support are implemented and measurements show whether avoiding Decoder and on-heap work provides a meaningful performance impact.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- java
- Domain
- data
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 25/100