Performance

Drupal 8 formatter for YouTube field which loads div with preview not iframe which can cause performance issues.

The Image Style Warmer module provides options to create image styles during upload or
via queue worker. So configured image derivates already exists when they are requested.

This module provides enhanced auto complete widget which is better in performance as compare to default auto complete widget, as it's name suggests that searching is based on json data, so instead

This module add simple token in files URLs based on file modified time. This is very useful for caching files in CDNs and differentiate if the image changes like a new resource.

In Drupal 8 core Page Cache max age settings are applied globally to all pages, and there is no way to set a different max age per page or leverage cache metadata max-age to override Cache-Control

This module is still in active development mode. And there will be some updates in .install file.