In the meantime, in terms of front-end optimisation
Page speed results:
Drupal methods of optimisation:
- Omega theme settings
- move js files to footer where possible
- stop default/core js/css files from being loaded
- Configure Omega's grunt files to uglify, compress, minify, aggregate etc for performance
- AdvAgg module https://www.drupal.org/project/advagg
- ImageAPI Optimize https://www.drupal.org/project/imageapi_optimize
- Speedy https://www.drupal.org/project/speedy
Resource:
- https://www.drupal.org/node/1388506
- YSlow Rules http://checkmyws.github.io/yslow-rules/
- Frontend-Ops http://rupl.github.io/frontend-ops
- older but some useful info http://drupalwatchdog.com/volume-1/issue-2/big-performance-wins-front-end