\Drupal\plugin\PluginType\PluginTypeManager::getPluginTypes() does not use file cache correctly

Sounds like needs backport to 10.2

Change makes sense, no idea what's going on with those numbers, I managed to get it to report 1.6GB, although I really wonder if those numbers are accurate or if it's confused somehow. top seems to match that.

Before:

 [success] Installation complete.  User name: admin  User password: **** [61.66 sec, 1.61 GB]

After:

 [success] Installation complete.  User name: admin  User password: **** [78.85 sec, 226.16 MB]

I guess another question here is why does the plugin module cause 10mb of memory usage...

Before I applied this change:

 [info] plugin module installed. [137.17 sec, 108.92 MB]
 [info] productdb_client module installed. [138.22 sec, 109.52 MB]
 [info] productdb_paragraphs module installed. [139.23 sec, 119.06 MB]
 [info] publication_date module installed. [140.3 sec, 130.55 MB]
 [info] redirect module installed. [141.41 sec, 141.22 MB]
 [info] schema_metatag module installed. [142.44 sec, 149.17 MB]
 [info] schema_article module installed. [143.48 sec, 159.83 MB]

After

 [info] plugin module installed. [13.74 sec, 98.41 MB]
 [info] productdb_client module installed. [13.85 sec, 98.94 MB]
 [info] productdb_paragraphs module installed. [13.95 sec, 109.19 MB]
 [info] publication_date module installed. [14.08 sec, 109.74 MB]
 [info] redirect module installed. [14.22 sec, 105.78 MB]
 [info] schema_metatag module installed. [14.32 sec, 108.63 MB]
 [info] schema_article module installed. [14.43 sec, 110.34 MB]

Oh I see.... this module results in the container being stored in static cache many many times... that's why the memory ballooned. But it should not even go in once!

More work incoming.

The current patch now results in less memory usage all the time:

Before patch

 [info] plugin module installed. [14.28 sec, 98.56 MB]
 [info] prefetcher module installed. [14.45 sec, 96.48 MB]
 [info] preserve_page_cache module installed. [14.55 sec, 107.57 MB]
 [info] productdb_client module installed. [14.64 sec, 119.94 MB]
 [info] productdb_paragraphs module installed. [14.74 sec, 129.66 MB]
 [info] publication_date module installed. [14.85 sec, 141.18 MB]
 [info] redirect module installed. [14.98 sec, 152.28 MB]
 [info] schema_metatag module installed. [15.08 sec, 160.24 MB]
 [info] schema_article module installed. [15.18 sec, 173.11 MB]

Before the commit to fix #8

 [info] plugin module installed. [14.57 sec, 98.55 MB]
 [info] prefetcher module installed. [14.73 sec, 100.8 MB]
 [info] preserve_page_cache module installed. [14.83 sec, 108.28 MB]
 [info] productdb_client module installed. [14.96 sec, 110.28 MB]
 [info] productdb_paragraphs module installed. [15.07 sec, 110.36 MB]
 [info] publication_date module installed. [15.22 sec, 110.81 MB]
 [info] redirect module installed. [15.37 sec, 106.63 MB]
 [info] schema_metatag module installed. [15.49 sec, 109.59 MB]
 [info] schema_article module installed. [15.62 sec, 110 MB]

After

 [info] plugin module installed. [13.8 sec, 97.46 MB]
 [info] prefetcher module installed. [13.95 sec, 96.81 MB]
 [info] preserve_page_cache module installed. [14.07 sec, 97.65 MB]
 [info] productdb_client module installed. [14.19 sec, 99.53 MB]
 [info] productdb_paragraphs module installed. [14.32 sec, 99.62 MB]
 [info] publication_date module installed. [14.46 sec, 99.23 MB]
 [info] redirect module installed. [14.6 sec, 100.63 MB]
 [info] schema_metatag module installed. [14.73 sec, 98.8 MB]
 [info] schema_article module installed. [14.86 sec, 100.7 MB]

I think we should add tests of installing multiple modules with plugin types so we can test that the caches work as expected.

Rebased and reviewed.

WOW, those numbers! 🤯