Yes, but what does your startup *do*? is slow

[jrmuizel]

I see it being really slow in Servo and Gecko:

https://jrmuizel.github.io/webrender/slow/Yes%2C%20but%20what%20does%20your%20startup%20*do*%3F%20%E2%80%93%20Terence%20Eden's%20Blog.html

I suspect this is just the large shadow radius at the top

[glennw]

Hopefully #1961 and/or #1984 will fix this, but I'll profile after they are sorted to confirm.

[pcwalton]

Just checked in Servo. This is fast now. Yay!

[glennw]

Confirmed in Gecko that it's holding 60fps quite easily. The main suspect remaining is that around half the time is spend generating clip masks. We're working on various improvements here.