mirror of
https://github.com/owncast/owncast.git
synced 2024-11-30 06:07:52 +03:00
110 lines
2.2 KiB
Go
110 lines
2.2 KiB
Go
package utils
|
|
|
|
import (
|
|
"sort"
|
|
"sync"
|
|
"time"
|
|
)
|
|
|
|
var l = sync.Mutex{}
|
|
|
|
// The "start" timestamp of a timing event.
|
|
var _pointsInTime = make(map[string]time.Time)
|
|
|
|
// A collection of timestamp durations for returning the average of.
|
|
var _durationStorage = make(map[string][]float64)
|
|
|
|
// StartPerformanceMonitor will keep track of the start time of this event.
|
|
func StartPerformanceMonitor(key string) {
|
|
l.Lock()
|
|
if len(_durationStorage[key]) > 20 {
|
|
_durationStorage[key] = removeHighValue(_durationStorage[key])
|
|
}
|
|
_pointsInTime[key] = time.Now()
|
|
l.Unlock()
|
|
}
|
|
|
|
// GetAveragePerformance will return the average durations for the event.
|
|
func GetAveragePerformance(key string) float64 {
|
|
timestamp := _pointsInTime[key]
|
|
if timestamp.IsZero() {
|
|
return 0
|
|
}
|
|
|
|
l.Lock()
|
|
defer l.Unlock()
|
|
|
|
delta := time.Since(timestamp).Seconds()
|
|
_durationStorage[key] = append(_durationStorage[key], delta)
|
|
if len(_durationStorage[key]) < 8 {
|
|
return 0
|
|
}
|
|
_durationStorage[key] = removeHighValue(_durationStorage[key])
|
|
|
|
return Avg(_durationStorage[key])
|
|
}
|
|
|
|
func removeHighValue(values []float64) []float64 {
|
|
sort.Float64s(values)
|
|
return values[:len(values)-1]
|
|
}
|
|
|
|
// Avg will return the average value from a slice of float64s.
|
|
func Avg(values []float64) float64 {
|
|
total := 0.0
|
|
for _, number := range values {
|
|
total += number
|
|
}
|
|
average := total / float64(len(values))
|
|
return average
|
|
}
|
|
|
|
// Sum returns the sum of a slice of values.
|
|
func Sum(values []float64) float64 {
|
|
total := 0.0
|
|
for _, number := range values {
|
|
total += number
|
|
}
|
|
return total
|
|
}
|
|
|
|
// MinMax will return the min and max values from a slice of float64s.
|
|
func MinMax(array []float64) (float64, float64) {
|
|
max := array[0]
|
|
min := array[0]
|
|
for _, value := range array {
|
|
if max < value {
|
|
max = value
|
|
}
|
|
if min > value {
|
|
min = value
|
|
}
|
|
}
|
|
return min, max
|
|
}
|
|
|
|
func mean(input []float64) float64 {
|
|
sum := Sum(input)
|
|
|
|
return sum / float64(len(input))
|
|
}
|
|
|
|
// Median gets the median number in a slice of numbers.
|
|
func Median(input []float64) float64 {
|
|
if len(input) == 1 {
|
|
return input[0]
|
|
}
|
|
|
|
c := make([]float64, len(input))
|
|
copy(c, input)
|
|
|
|
var median float64
|
|
l := len(c)
|
|
if l%2 == 0 {
|
|
median = mean(c[l/2-1 : l/2+1])
|
|
} else {
|
|
median = c[l/2]
|
|
}
|
|
|
|
return median
|
|
}
|