GODRIVER-2907 Use median ops/sec

x/mongo/driver/mongocrypt/binary_test.go

@@ -14,6 +14,7 @@ import (
  "os"
  "path"
  "runtime"
+ "sort"
  "testing"
  "time"
 
@@ -151,6 +152,17 @@ func newCryptForBench(b *testing.B) *MongoCrypt {
  return crypt
 }
 
+func calcMedian(values []float64) float64 {
+ sort.Float64s(values)
+
+ n := len(values)
+ if n%2 == 0 {
+ return (values[n/2-1] + values[n/2]) / 2.0
+ }
+
+ return values[(n-1)/2]
+}
+
 func BenchmarkBulkDecryption(b *testing.B) {
  const numKeys = 1500
  const repeatCount = 10
@@ -180,7 +192,7 @@ func BenchmarkBulkDecryption(b *testing.B) {
  // Run the benchmark. Repeat benchmark for thread counts: (1, 2, 8, 64).
  // Repeat 10 times.
  for _, bench := range benchmarks {
- var totalOpsPerSec float64
+ var opsPerSec []float64
 
  b.Run(fmt.Sprintf("threadCount=%v", bench.threads), func(b *testing.B) {
  runtime.GOMAXPROCS(bench.threads)
@@ -197,11 +209,10 @@ func BenchmarkBulkDecryption(b *testing.B) {
  }
  })
 
- totalOpsPerSec += float64(b.N) / time.Now().Sub(startTime).Seconds()
+ opsPerSec = append(opsPerSec, float64(b.N)/time.Now().Sub(startTime).Seconds())
  }
  })
 
- avgOpsPerSec := totalOpsPerSec / float64(repeatCount)
- b.Logf("thread count: %v, ops/sec: %.2f\n", bench.threads, avgOpsPerSec)
+ b.Logf("thread count: %v, median ops/sec: %.2f\n", bench.threads, calcMedian(opsPerSec))
  }
 }