ColdPaleLight

> If there is anything that could be done to reduce the cost of "construct + bounds" to be less than it is before this fix, that would be the...

@flar Add a flag to control whether the produce rtree does solve the performance problem. I added a flag called `need_produce_rtree` which default value is `false`, if it is `false`...

@flar friendly ping

这个应该会被触发呀，你是什么版本的Boost，有可复现的Demo吗

@chinmaygarde I think this PR is ready for review now :)

这个方案中，纹理也会放到ImageCache里，不及时回收是正常的，和ui.Image一样，为了复用。

> @ColdPaleLight is this still on your radar? Yes, I will restart this work when the PR https://github.com/flutter/engine/pull/34365 lands.

使用了哪个版本，能给一个可复现的demo吗

nanovg has some flaws when calculating whether a polygon is convex. The reason for this issue is that nanovg considers the star to be a convex polygon, so it uses...

@flar I try to rebase the latest code, but I have a problem. This PR is based on the assumption that the method `DisplayList::rtree()` is only valid if the flag...