StorageComparer should not wrap sourceStorage with a memory cache if it extends \Drupal\Core\Config\FileStorage

If you install standard from config this saves 0.05 MB - so not massive but not nothing. Compare
[notice] Performed install task: install_config_import_batch [7.25 sec, 72.28 MB]
with
[notice] Performed install task: install_config_import_batch [7.05 sec, 72.23 MB]

On a real site that has a pile of config and modules installed and has been on Drupal for quite a while... compare
[notice] Performed install task: install_config_import_batch [57.93 sec, 908.19 MB]
with
[notice] Performed install task: install_config_import_batch [58.34 sec, 896.32 MB]
So that's nearly 12 MB!!! Note that the times vary quite a lot on repeated runs but the memory usage is exactly the same.

This looks great, especially when looking at lines of code per mb saved.

This doesn't seem worth the effort of backporting so left this one in 11.x only.

Committed and pushed 6cbfa8c2de to 11.x. Thanks!

longwave → closed merge request !6243

Automatically closed - issue fixed for 2 weeks with no activity.