1503916 - Implement 2018 performance audit recommendations

Status: RESOLVED WONTFIX

(developer.mozilla.org Graveyard :: Performance, enhancement, P2)

Description

[John Whitlock [:jwhitlock]]

This is a tracking bug for implementing recommendations from the performance audit.

A performance audit by Tim Kadlec was commissioned in Q2 2018, which included notifying SpeedCurve about deployments (bug 1445641) and tracking page load time and other key metrics with synthetic testing (simulating a browser from a known location) and some real user metrics (recording page load as Google Analytics events, bug 1468271). The results and methodology are documented at https://github.com/mdn/mdn-fiori/wiki.

The recommended follow-on actions (https://github.com/mdn/sprints/issues/252) are:

* Highest priority (1):
  - Consider removing some fonts/variations
  - Add cross origin to resources
  - Use the Font Loading API
  - Subset the ZillaSlab and OpenSans fonts for different language support
* High priority (2):
  - Create side bar based on HTML5
  - Remove unused styles
  - Processing user generated content
* Medium priority (3):
  - Inline dnthelper
  - Inline the contents of locale-*.css
* Low priority (4)
  - Increase cache load time for interactive examples

Comment 1

[BMO Automation]

MDN Web Docs' bug reporting has now moved to GitHub. From now on, please file content bugs at https://github.com/mdn/sprints/issues/ and platform bugs at https://github.com/mdn/kuma/issues/.