Part of the automated tests for the Thunder distribution is performance regression tests. We test various editorial tasks by executing them as Nightwatch tests and sending time markers to an Elastic APM stack at various stages of the task.
We then run those tests multiple times for different branches of the distribution and compare the results. Two branches we always test are a branch with the current Drupal version (Drupal 8.8.1 as of now) and another one with the latest version of the previous Drupal minor version (which is currently Drupal 8.7.11).
The test that measures the time between clicking on the "Save" button on a node edit form and the fully-loaded target page has seen a noticeable regression between Drupal 8.7 and 8.8.
This is a visualization of multiple test runs
The yellow line represents Drupal 8.7, the green one 8.8.
The average time suggests, that Drupal 8.8 takes about 15% longer to execute the node save.
It has to be said, that those tests are not run with Vanilla Drupal, we will provide easier reproducible tests later. But we wanted to get this getting started now.
Some things to consider
Postponed: needs info
11.0 🔥
It affects performance. It is often combined with the Needs profiling tag.
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
Has this been solved by the commit of the single child issue, #3131585: Performance regression caused by using the last installed entity definitions → ?
If we don't receive additional information to help with the issue, it may be closed after three months.
Thanks!