niki/vendor/github.com/redis/go-redis/v9/internal/internal.go

package internal

import (
	"time"

	"github.com/redis/go-redis/v9/internal/rand"
)

func RetryBackoff(retry int, minBackoff, maxBackoff time.Duration) time.Duration {

	if retry < 0 {

		panic("not reached")

	}

	if minBackoff == 0 {

		return 0

	}

	d := minBackoff << uint(retry)

	if d < minBackoff {

		return maxBackoff

	}

	d = minBackoff + time.Duration(rand.Int63n(int64(d)))

	if d > maxBackoff || d < minBackoff {

		d = maxBackoff

	}

	return d

}