Improve browser Total Blocking Time (TBT) performance of View File (source) page into S3 tier
The View File (source) page's Total Blocking Time (TBT) results have been significantly improved in #328221 (closed). This issue is a follow up to improve browser performance results further:
* Environment: 10k
* Environment Version: 14.5.0-pre `438c3b27dbe`
* Date: 2021-10-22
NAME | FCP (ms) | LCP (ms) | TBT (ms) | SI (ms) | LVC (ms) | TFR SIZE (kb) | SCORE | RESULT
---------------------------|----------|----------------|-----------------|---------|----------|---------------|-------|-------
web_project_file_source | 792 | ✓ 4756 (<7000) | ✓ 4356 (<5500) | 994 | 4767 | 1437.6 | 72 | Passed
The View File (source) page being tested can be seen here on Staging. This page is specifically one loading in a large source file. Below is the screenshot of page's historical test results
Test Details
Testing was done on our 10k Reference Architecture environment with our lab condition SiteSpeed pipeline (named GitLab Browser Performance Tool internally). The project being tested is a copy of gitlabhq (tarball can be found here). GitLab Browser Performance Tool tests information is listed at Current test details page.
The latest GitLab Browser Performance pipeline results can always be found here. Through this page the full SiteSpeed report can be found via the SiteSpeed Report
link on that page.
As per our performance targets this page's TBT metrics is below the target of 9000 ms which is severity2 . Task is to improve the page's browser performance into S3 tier.