runtime: parallel run test
This CL reduces
the go test runtime time from 130s to 59s.
Change-Id: I91babcd15723a2e7bc706e4e9bddaf3ce39d5b2f
GitHub-Last-Rev:
54c3c82269ca468f5d91fec2af13ee37b975495e
GitHub-Pull-Request: golang/go#65765
Cq-Include-Trybots: luci.golang.try:gotip-linux-386-longtest
Reviewed-on: https://go-review.googlesource.com/c/go/+/564995
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Keith Randall <khr@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>