In this post I’ll dig into what equality, in the context of a Go program, means and why changes like this have a measurable impact on the size of a Go program.

Addendum: thanks to Brad’s prodding, Go 1.15 already has a bunch of improvements by Cherry Zhang and Keith Randall that fix the most egregious of the failures to eliminate unnecessary equality and hash functions (although I suspect it was also to avoid the proliferation of this class of CLs).