Talk is:


Page performance is like black magic

To fix:

  • Set a goal

    • ~1s page load-

    • Speed index of less then 1k

    • Max 200ms server responce time

  • Text your site

    • []

    • Google PageSpeed Insights

  • Slowness is generated little by little.

    • Every un-optimised image,

    • Every bloaty css or js library

    • Just adds to your slugishness

  • Use your tools

    • Grunt/gulp

      • minimize your code!

      • optimize your images!

  • Remove un-used CSS

    • Bootstrap can be over kill! Most people

    • Most projects I am on that use bootstrap have ~85% unused or overwritten bootstrap code

  • UnCSS

    • Removes unused CSS

    • There is a grunt and gulp task to help with this.

      • grunt-uncss

      • gulp-uncss

  • This is great for projects using bootstrap

  • CSS Regression testing

    • helpfull for end to end testing

    • Tools- Will show visual percentage changed, useful during optimization stages to make sure you didn’t blow up all your stuff

      • PhantomJS --- Scriptable headless browser

      • CasperJS --- Navigation scripting & caching

      • PhantomCSS --- Screenshot and comparison library

  • Optimize Critical Path CSS

    • Get content shown AS SOON AS POSSIBLE!!
  • Tools npm install grunt-perfbudget

    • PageSpeedInsights CLI --- psi (with grunt pluggin)

    • phantoms CLI (with grunt pluggin)

    • Parker --- CSS anilytics

  • style stats