Performance metrics. What’s this all about?

Measuring performance of page loading is a hard task. Hence together with the community are working on Progressive Web Metrics (PWM’s). What are PWM’s and why do we need them? A bit history of browser metrics. A while ago we had 2 main points (events) for measuring performance: DOMContentLoaded — fired when page is loaded but scripts just started to be executed. load event which is fired then a pa

[ginpei]

パフォーマンス指標の解説。各指標が「開発者にどう役立つか」はわかりやすい。何だろ、特にどのツールのってわけでもなくて、全般的な用語解説？　でもどうやって計るんだろ。

[efcl]

ウェブブラウザのパフォーマンスのメトリクスについての解説。 またそれらを計測できるツールについて