Improve the real or perceived speed of the site, or monitor performance metrics.
The cacheflusher module adds a link to the navigation toolbar that allows users to clear drupal's cache.
Module for batch processing of configuration settings of webform components. Currently this module only supports below functionalities --
The Cache Invalidate module allows developer to set trigger to force an entity cache clean
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.