supported percentile option

Author: samitani

runner/runner.go

@@ -17,8 +17,6 @@ const (
 	histogramSize = 1024
 	histogramMin  = 0.001
 	histogramMax  = 100000
-
-	percentile = 95
 )
 
 type (
@@ -28,6 +26,7 @@ type (
 		Time           int    `long:"time" description:"limit for total execution time in seconds" default:"10"`
 		ReportInterval int    `long:"report-interval" description:"periodically report intermediate statistics with a specified interval in seconds. 0 disables intermediate reports" default:"0"`
 		Histogram      string `long:"histogram" choice:"on" choice:"off" description:"print latency histogram in report" default:"off"` //nolint:staticcheck
+		Percentile     int    `long:"percentile" description:"percentile to calculate in latency statistics (1-100)" default:"95"`
 	}
 
 	Runner struct {
@@ -83,6 +82,8 @@ func (r *Runner) Run(bench benchmark.Benchmark) error {
 		fmt.Printf("Report intermediate results every %d second(s)\n\n\n", r.opts.ReportInterval)
 	}
 
+	var percentile = r.opts.Percentile
+
 	err := bench.Init(context.Background())
 	if err != nil {
 		return err