net: add benchmark test for SendFile
BenchmarkSendFile/1024-4 716760 1582 ns/op 647.31 MB/s 0 B/op 0 allocs/op
BenchmarkSendFile/2048-4 624632 2057 ns/op 995.55 MB/s 0 B/op 0 allocs/op
BenchmarkSendFile/4096-4 429459 2665 ns/op 1537.06 MB/s 0 B/op 0 allocs/op
BenchmarkSendFile/8192-4 275941 4996 ns/op 1639.56 MB/s 0 B/op 0 allocs/op
BenchmarkSendFile/16384-4 149577 8522 ns/op 1922.58 MB/s 0 B/op 0 allocs/op
BenchmarkSendFile/32768-4 75427 14791 ns/op 2215.47 MB/s 0 B/op 0 allocs/op
BenchmarkSendFile/65536-4 43912 28402 ns/op 2307.41 MB/s 0 B/op 0 allocs/op
BenchmarkSendFile/131072-4 23509 48657 ns/op 2693.82 MB/s 0 B/op 0 allocs/op
BenchmarkSendFile/262144-4 12512 91791 ns/op 2855.87 MB/s 0 B/op 0 allocs/op
BenchmarkSendFile/524288-4 5760 579891 ns/op 904.12 MB/s 0 B/op 0 allocs/op
BenchmarkSendFile/
1048576-4 3020 344129 ns/op 3047.05 MB/s 0 B/op 0 allocs/op
Change-Id: Iaf75e19c9ae8d77b89b3eabb2e9142f59c124536
Reviewed-on: https://go-review.googlesource.com/c/go/+/425878
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Andy Pan <panjf2000@gmail.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>