<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=494358) </details> <!--IssueSummary end--> We have an excellent caching POC by @patrickbajao which uses diff file paths to cache Rapid Diffs HTML file by file. This approach has a downside that it needs to get the contents of the diff files before it can return the cache. We should experiment with another approach: create a cache key using MR ID and MR version to cache the HTML of the first 5 files and the rest of the files. We expect this to produce much better performance improvements: current POC only produces 19-22% improvement in response time.