sitespeed.io

Sitespeed.io 是一个开源工具，可以帮助你监控、分析和优化你的网站速度和性能，它是基于教练的建议和性能最佳实践，并使用导航定时API、用户定时和可视化指标（FirstVisualChange、SpeedIndex 和 LastVisualChange）收集浏览器指标。「 Sitespeed.io is an open source tool that helps you monitor, analyze and optimize your website speed and performance, based on performance best practices advices from the coach and collecting browser metrics using the Navigation Timing API, User Timings and Visual Metrics (FirstVisualChange, SpeedIndex & LastVisualChange). 」