Exponential backoff without jitter (also without bloat)

expbackoff.go

// you dont need some fancy exponential backoff packages with unnecessary
// bloats. this is fine.
package main

import "time"

func main() {
	backoff = time.Duration(0)
	for {
		backoff = exponential(backoff)
		time.Sleep(backoff)
	}
}

func exponential(d time.Duration) time.Duration {
	const (
		min = 16 * time.Millisecond
		max = 1024 * time.Millisecond
	)
	d *= 2
	if d < min {
		d = min
	}
	if d > max {
		d = max
	}
	return d
}