升级流程引擎配置文件版本

vendor/github.com/montanaflynn/stats/util.go

@@ -0,0 +1,43 @@
+package stats
+
+import (
+	"sort"
+	"time"
+)
+
+// float64ToInt rounds a float64 to an int
+func float64ToInt(input float64) (output int) {
+	r, _ := Round(input, 0)
+	return int(r)
+}
+
+// unixnano returns nanoseconds from UTC epoch
+func unixnano() int64 {
+	return time.Now().UTC().UnixNano()
+}
+
+// copyslice copies a slice of float64s
+func copyslice(input Float64Data) Float64Data {
+	s := make(Float64Data, input.Len())
+	copy(s, input)
+	return s
+}
+
+// sortedCopy returns a sorted copy of float64s
+func sortedCopy(input Float64Data) (copy Float64Data) {
+	copy = copyslice(input)
+	sort.Float64s(copy)
+	return
+}
+
+// sortedCopyDif returns a sorted copy of float64s
+// only if the original data isn't sorted.
+// Only use this if returned slice won't be manipulated!
+func sortedCopyDif(input Float64Data) (copy Float64Data) {
+	if sort.Float64sAreSorted(input) {
+		return input
+	}
+	copy = copyslice(input)
+	sort.Float64s(copy)
+	return
+}