go test -benchmem -run=^$ -bench ^BenchmarkForwardTsoConcurrently$ github.com/tikv/pd/tests/integrations/mcs/tso -benchtime 120s

client = 3
164         776899433 ns/op        52592338 B/op     446288 allocs/op
182         779831256 ns/op        52671058 B/op     446771 allocs/op
176         776116538 ns/op        52677991 B/op     446741 allocs/op

client = 1
386         342842281 ns/op        17493004 B/op     146447 allocs/op
390         344128967 ns/op        17487349 B/op     146318 allocs/op
379         356701493 ns/op        17528155 B/op     146427 allocs/op

None.