问题
I have low FPS when start scrolling. I use DevTool Timeline to find out the reasons for this. But I can't find what means dashed chart. Help me please!
回答1:
It means the work is done by a background thread, rather than by the main thread.
Take this screenshot as an example. A small amount of code runs on the main thread, followed by most of the rendering happening on other threads.
来源：https://stackoverflow.com/questions/37181979/what-means-dashed-chart-in-chrome-devtool-timeline