Add changelog for #12448

CHANGELOG.txt

@@ -11,6 +11,7 @@ Changelog
  * Default to the `standard` tokenizer on Elasticsearch, to correctly handle numbers as tokens (Matt Westcott)
  * Add color-scheme meta tag to Wagtail admin (Ashish Nagmoti)
  * Add the ability to set the default privacy restriction for new pages using `get_default_privacy_setting` (Shlomo Markowitz)
+ * Improve performance of batch purging page urls in the frontend cache, avoiding n+1 query issues (Andy Babic)
  * Fix: Take preferred language into account for translatable strings in client-side code (Bernhard Bliem, Sage Abdullah)
  * Fix: Do not show the content type column as sortable when searching pages (Srishti Jaiswal, Sage Abdullah)
  * Fix: Support simple subqueries for `in` and `exact` lookup on Elasticsearch (Sage Abdullah)

docs/releases/6.5.md

@@ -20,6 +20,7 @@ depth: 1
  * Default to the `standard` tokenizer on Elasticsearch, to correctly handle numbers as tokens (Matt Westcott)
  * Add color-scheme meta tag to Wagtail admin (Ashish Nagmoti)
  * Add the ability to set the [default privacy restriction for new pages](set_default_page_privacy) using `get_default_privacy_setting` (Shlomo Markowitz)
+ * Improve performance of batch purging page urls in the frontend cache, avoiding n+1 query issues (Andy Babic)
 
 ### Bug fixes