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Flutter could use less sqrt(dx² + dy²) <= r and more dx² + dy² <= r² #187894
Description
Use case
sqrt is much slower than x*x and there are a few places in codebase that could be optimized. Not sure I agree with the image, but on my microbenchmarks x*x got 70% faster (not 10x but still very big improvement!)
Pros: much faster.
Cons: code slightly harder to read (why is it multiplying twice or not doing sqrt?).
Activity
Avoid unnecessary work in `BoxDecoration` and `RenderPhysicalModel` (f…