PerfMatters

    Pinterest

    • 1M+ request per second
    • dedicated performance team
    • perf environment to run automation integration tests (100 times)
    • calculate 90th percentile of Pinner Wait Time (PWT)
    • binary search (git bisect) to detect which commit introduced the regression
    • create a component
    • with http2 bundling is still optimal
    • img sprite for fold images would help
    • <link as="script">

    Perf Timings

    • RUM (Real User Metrics)
    • focus on the DOM order instead of using JS
    • use <button> & instead of building your custom with <div>
    • use modular CSS like
    • use html tags like nav, , head, and aside
    • w3c wai-aria-practices

    MarcySutton (Deque Systems)

    • buffer with generator + for paralellizing http requests but start serving them as soon as the first request is complete.

    @linclark (Mozilla)

    • webworkers
    • WebAssembly + React