Performance matters, but you already knew that. The real questions are: what's fast enough, what are the critical metrics and constants, and what processes and functions do we need to monitor and optimize? We'll take a look at how the wetware between our ears determines the performance constants and metrics, and take a hands-on look at the Response, Animation, Idle, Load ("RAIL") performance principles that we need to monitor and optimize for when building our web applications.

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