Chrome DevTools 性能分析

https://developers.google.com/web/tools/chrome-devtools/evaluate-performance/reference

Bottom-Up: Self Time represents the time directly spent in that activity. Total Time represents the time spent in that activity or any of its children.

https://stackoverflow.com/questions/38001857/what-do-the-striped-grey-areas-in-the-chrome-cpu-timeline-mean

Grey means that DevTools is aware of the activity but doesn't know the identity of it.

Striped means activity that is off of the main thread.