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net/speedtest: retune to meet iperf on localhost in a VM

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- removed some in-flow time calls
- increase buffer size to 2MB to overcome syscall cost
- move relative time computation from record to report time

Signed-off-by: James Tucker <james@tailscale.com>
This commit is contained in:
James Tucker
2022-09-14 17:52:47 -07:00
committed by James Tucker
parent 146f51ce76
commit f7cb535693
4 changed files with 28 additions and 35 deletions
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3
cmd/speedtest/speedtest.go
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@@ -110,11 +110,12 @@ func runSpeedtest(ctx context.Context, args []string) error {
w := tabwriter.NewWriter(os.Stdout, 12, 0, 0, ' ', tabwriter.TabIndent)
fmt.Println("Results:")
fmt.Fprintln(w, "Interval\t\tTransfer\t\tBandwidth\t\t")
startTime := results[0].IntervalStart
for _, r := range results {
if r.Total {
fmt.Fprintln(w, "-------------------------------------------------------------------------")
}
fmt.Fprintf(w, "%.2f-%.2f\tsec\t%.4f\tMBits\t%.4f\tMbits/sec\t\n", r.IntervalStart.Seconds(), r.IntervalEnd.Seconds(), r.MegaBits(), r.MBitsPerSecond())
fmt.Fprintf(w, "%.2f-%.2f\tsec\t%.4f\tMBits\t%.4f\tMbits/sec\t\n", r.IntervalStart.Sub(startTime).Seconds(), r.IntervalEnd.Sub(startTime).Seconds(), r.MegaBits(), r.MBitsPerSecond())
}
w.Flush()
return nil