ArgumentError (Attributes per element limit exceeded) when trying to open the diff of a locked topic

[zogstrip (Régis HANOL)]

Closing this one as the discussion continues over at

Backend 502/504 Timeout when saving major edits to long posts (~100k words) due to Diff bottleneck

When editing and saving extremely long posts (around 100,000 characters), we encountered a backend timeout issue. The server becomes unresponsive during the save operation, resulting in 502/504 errors. The frontend console shows the following error stack: ajax-error.js:36:15 l ajax-error.js:36 u ajax-error.js:75 d ajax-error.js:84 Ember 41 update rest.js:72 update rest.js:72 save rest.js:115 editPost composer.js:1147 Ember 6 I performed some comparative tests which suggest the bottleneck is in…