Surely the first bit of advice in any post about analysing website performance should be: USE WEBPAGETEST
It gives you access to everything Chrome dev tools do, plus so much more:
* speed index as a metric for the visual perception of performance
* easy comparison of cached vs uncached results
* operating on median metrics to ignore outliers
* side-by-side video playback of compared results
* different user agents
* traffic-shaping
* SPOF analysis
* a scriptable API
* custom metrics
I could go on. There's a lot of excellent performance tooling out there but WebPageTest is easily the most useful from my experience.
It gives you access to everything Chrome dev tools do, plus so much more:
I could go on. There's a lot of excellent performance tooling out there but WebPageTest is easily the most useful from my experience.