responsive interfaces

Responsive Interfaces

Baris Aydinoglu

August 12 2015

Agenda

I UI Thread

I Browser UI Thread

I Yielding with Timers

I Web Workers

UI Thread

Two jobs

I Draw UI

I Execute JS

rdquoNo UI updates while JS running

rdquoLong-running JS

dArrUnresponsive UI

Browser UI Thread

rdquoBrowser Limits

rdquoHow Long Is Too Long

I JS lt 100ms

rdquoHow Long Is Too Long

I JS lt 100ms

Yielding with Timers

Timer Basics

I Delay JS tasks gt100ms to yield UI update

Timer Precision

I Timer resolution is 15ms in Windows

I Delay lt15ms locks IE

I Recommended min 25ms

I Array processing with timers

I Splitting up tasks

Timer Example - v1

Timer Example - v2

Timer Example - v3

Timed Code

I 10000 item 25ms

I Total delay lt 50ms

rdquoHigher frequency

dArrSlower app

Web Workers

Worker Environment

I Asynchronous JS execution

I Not on the UI thread

I No UI delays

Worker Usage Example

Worker Communication

I Data-driven

I Inputoutput serialized

I No access to DOMBOM

Worker Communication Example

Loading External Files

I Blocks worker script

I NOT UI

Loading External File Example

Practical Usage

Practical Usage

Go Deeper

I http www html5rocks com en tutorials workers basics

I http w3c github io setImmediate

I http www w3 org TR html5 webappapis html timers

Thatrsquos all Folks

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