net/url: use quick path in URL.Encode() on empty map
Make url.Values.Encode() slightly more efficient when url.Values
is an empty but non-nil map.
Change-Id: I7f205cc7e67526a1fa0035eab4773cec5e0f2c99
GitHub-Last-Rev:
0530b439db8cea755464c6dc2d268a0bd567889e
GitHub-Pull-Request: golang/go#63836
Reviewed-on: https://go-review.googlesource.com/c/go/+/538637
Reviewed-by: Damien Neil <dneil@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Damien Neil <dneil@google.com>