Unnecessary renders on parent update when $attrs is bound #10115
Description
Version
2.6.10
Reproduction link
https://codepen.io/anon/pen/zQVRgG?editors=1010
Steps to reproduce
Type something into the first field
Uncomment line 8 or 14 then try again
What is expected?
In console:
Render a
What is actually happening?
In console:
Render a
Render b