go.charczuk.com@v0.0.0-20240327042549-bc490516bd1a/sdk/mathutil/mean_duration.go (about)

     1  /*
     2  
     3  Copyright (c) 2024 - Present. Will Charczuk. All rights reserved.
     4  Use of this source code is governed by a MIT license that can be found in the LICENSE file at the root of the repository.
     5  
     6  */
     7  
     8  package mathutil
     9  
    10  import (
    11  	"math/big"
    12  	"time"
    13  )
    14  
    15  // MeanDuration returns the mean or average of a list of durations.
    16  //
    17  // The underlying math is done with the `big` package so it may
    18  // be slightly slower than anticipated, but this prevents overflows.
    19  func MeanDuration(durations []time.Duration) time.Duration {
    20  	if len(durations) == 0 {
    21  		return 0
    22  	}
    23  	accum := new(big.Int)
    24  	for _, d := range durations {
    25  		accum.Add(accum, big.NewInt(int64(d)))
    26  	}
    27  	accum.Div(accum, big.NewInt(int64(len(durations))))
    28  	return time.Duration(accum.Int64())
    29  }