mirror of https://github.com/divan/expvarmon.git
42 lines
975 B
Go
42 lines
975 B
Go
package main
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import (
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"github.com/antonholmquist/jason"
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)
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func averageJason(array []*jason.Value) float64 {
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var arr []float64
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for _, v := range array {
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val, _ := v.Float64()
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arr = append(arr, val)
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}
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return average(arr)
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}
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// average calculates average (mean) value for int/float array
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// trimming zero values from the right.
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//
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// The whole array/average thing was added to support memstats.PauseNs
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// array, which may be filled with zeroes on very beginning.
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// Probably it would be better to use Weighted Moving Average and
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// add some advanced arrays avarages support, but it's probably wouldn't
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// be used much, but PauseNs will be for sure.
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func average(arr []float64) float64 {
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// find rightmost non-zero and trim
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right := len(arr)
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for i := right; i > 0; i-- {
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if arr[i-1] != 0.0 {
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right = i
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break
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}
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}
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trimmed := arr[:right]
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// calculate mean
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var sum float64
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for _, v := range trimmed {
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sum += v
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}
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return sum / float64(len(trimmed))
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}
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