cmd/compile: search for remaining WB ops from end to beginning
The writebarrier pass processes WB ops from beginning to end, replacing them by other values. But it also checks whether there are more ops to process by walking from beginning to end. This is quadratic, so walk from end to beginning instead. This speeds up compiling the code in issue 13554: name old time/op new time/op delta Pkg 11.9s ± 2% 8.3s ± 3% -29.88% (p=0.000 n=18+17) Updates #13554 Passes toolstash-check. Change-Id: I5f8a872ddc4b783540220d89ea2ee188a6d2b2ff Reviewed-on: https://go-review.googlesource.com/43571 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:Cherry Zhang <cherryyz@google.com>
Showing
Please
register
or
sign in
to comment