apache / apache/lucene

Add profiling support for DoubleValuesSource

Open
#15,344 1 comment 1 reaction 0 assignees View on GitHub
type:enhancement
Dominant language
Java
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Avg merge
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Merged PRs (30d)
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Description

### Description

Lucene now has great [profiling support](https://github.com/apache/lucene/blob/main/lucene/sandbox/src/java/org/apache/lucene/sandbox/search/QueryProfilerIndexSearcher.java) for understanding search-time costs. It provides detailed breakdowns of time spent across sub-queries and scorers.

I'm wondering if it makes sense to expand profiling support to other value-producing components, such as Lucene `DoubleValuesSource`. In Amazon Product Search, we make heavy use of this powerful dynamic expression features for search (such as filtering or scoring based on a runtime computed expression). So having a profiling for `DoubleValuesSource` could be really useful since we can track down slow ones and optimize. This could also benefit other users who rely on this feature as well.

I'm happy to draft a PR and iterate. Opening this issue to gather community feedback first.

Contributor guide

Open the contributing guide

Research direction

Start by reading lucene/sandbox/src/java/org/apache/lucene/sandbox/search/QueryProfilerIndexSearcher.java, then investigate how profiling could extend to DoubleValuesSource in runtime filtering or scoring. Done means a concrete profiling design and implementation scope, with the community feedback requested by the issue resolved.

Written by the indexing model from the issue text.

Assessment

Tech stack
java
Domain
search
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

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