Yegor 324fdb6b3c
LayoutBuilder: skip calling builder when constraints are the same (#55414)
Avoid calling `builder` in `ConstrainedLayoutBuilder` when layout constraints are the same.

[Design doc](flutter.dev/go/layout-builder-optimization).

## Related Issues

Fixes https://github.com/flutter/flutter/issues/6469
2020-05-08 12:27:59 -07:00
..
2020-04-07 17:10:18 -04:00