By catch on
Change record status: 
Published (View all published change records)
Project: 
Drupal core
Introduced in branch: 
11.2.x
Introduced in version: 
11.2.0
Issue links: 
https://www.drupal.org/node/3511123
Description: 

PerformanceData::getCacheTagChecksumCount() and PerformanceData::getCacheTagIsValidCount() have both been deprecated.

There is no direct replacement, however the getCacheTagGroupedLookups() and getCacheTagLookupQueryCount() provide a more realistic reflection of how cache tag lookups impact a page and may be used instead.

Impacts: 
Module developers
Site templates, recipes and distribution developers