Improve flat_object field parsing performance by reducing two passes …

…to a single pass (#16297) Signed-off-by: panguixin <[email protected]>
opensearch-project · Jan 26, 2025 · cfc1aab · cfc1aab
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -26,6 +26,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Introduce framework for auxiliary transports and an experimental gRPC transport plugin ([#16534](https://github.com/opensearch-project/OpenSearch/pull/16534))
 - Support searching from doc_value using termQueryCaseInsensitive/termQuery in flat_object/keyword field([#16974](https://github.com/opensearch-project/OpenSearch/pull/16974/))
 - Added a new `time` field to replace the deprecated `getTime` field in `GetStats`. ([#17009](https://github.com/opensearch-project/OpenSearch/pull/17009))
+- Improve flat_object field parsing performance by reducing two passes to a single pass ([#16297](https://github.com/opensearch-project/OpenSearch/pull/16297))
 - Improve performance of the bitmap filtering([#16936](https://github.com/opensearch-project/OpenSearch/pull/16936/))
 - Added ability to retrieve value from DocValues in a flat_object filed([#16802](https://github.com/opensearch-project/OpenSearch/pull/16802))
 - Added new Setting property UnmodifiableOnRestore to prevent updating settings on restore snapshot ([#16957](https://github.com/opensearch-project/OpenSearch/pull/16957))

diff --git a/server/src/main/java/org/opensearch/common/xcontent/JsonToStringXContentParser.java b/server/src/main/java/org/opensearch/common/xcontent/JsonToStringXContentParser.java