WPCOM_JSON_API_List_Comments_Endpoint: Do not prefetch comment meta f…

…or large hierarchical threads (#36460) * WPCOM_JSON_API_List_Comments_Endpoint: Do not prefetch comment meta for large hierarchical threads * changelog
Automattic · Mar 19, 2024 · f4c805e · f4c805e
1 parent fa68981
commit f4c805e
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diff --git a/projects/plugins/jetpack/changelog/update-WPCOM_JSON_API_List_Comments_Endpoint b/projects/plugins/jetpack/changelog/update-WPCOM_JSON_API_List_Comments_Endpoint
@@ -0,0 +1,4 @@
+Significance: patch
+Type: other
+
+WPCOM_JSON_API_List_Comments_Endpoint: Do not prefetch comment meta for large hierarchical threads
diff --git a/projects/plugins/jetpack/json-endpoints/class.wpcom-json-api-list-comments-endpoint.php b/projects/plugins/jetpack/json-endpoints/class.wpcom-json-api-list-comments-endpoint.php
@@ -308,6 +308,10 @@ public function callback( $path = '', $blog_id = 0, $object_id = 0 ) {
 				}
 			}
 		}
+		if ( $args['hierarchical'] && $found > 5000 ) {
+			// Massive comment thread found; don't pre-load comment metadata to reduce memory used.
+			$query['update_comment_meta_cache'] = false;
+		}
 
 		if ( $post_id ) {
 			$post = get_post( $post_id );