Generates the table for the Automatic Job Retry section of the Sidekiq wiki. See https://github.com/mperham/sidekiq/wiki/Error-Handling/#automatic-job-retry

example.txt

 # | Next retry backoff | Total waiting time
 -------------------------------------------
 1 |       0d 0h 0m 20s |       0d 0h 0m 20s
 2 |       0d 0h 0m 26s |       0d 0h 0m 46s
 3 |       0d 0h 0m 46s |       0d 0h 1m 32s
 4 |       0d 0h 1m 56s |       0d 0h 3m 28s
 5 |       0d 0h 4m 56s |       0d 0h 8m 24s
 6 |      0d 0h 11m 10s |      0d 0h 19m 34s
 7 |      0d 0h 22m 26s |       0d 0h 42m 0s
 8 |      0d 0h 40m 56s |      0d 1h 22m 56s
 9 |       0d 1h 9m 16s |      0d 2h 32m 12s
10 |      0d 1h 50m 26s |      0d 4h 22m 38s
11 |      0d 2h 47m 50s |      0d 7h 10m 28s
12 |       0d 4h 5m 16s |     0d 11h 15m 44s
13 |      0d 5h 46m 56s |      0d 17h 2m 40s
14 |      0d 7h 57m 26s |        1d 1h 0m 6s
15 |     0d 10h 41m 46s |     1d 11h 41m 52s
16 |      0d 14h 5m 20s |      2d 1h 47m 12s
17 |     0d 18h 13m 56s |       2d 20h 1m 8s
18 |     0d 23h 13m 46s |     3d 19h 14m 54s
19 |      1d 5h 11m 26s |      5d 0h 26m 20s
20 |     1d 12h 13m 56s |     6d 12h 40m 16s
21 |     1d 20h 28m 40s |       8d 9h 8m 56s
22 |       2d 6h 3m 26s |    10d 15h 12m 22s
23 |      2d 17h 6m 26s |     13d 8h 18m 48s
24 |      3d 5h 46m 16s |      16d 14h 5m 4s
25 |     3d 20h 11m 56s |     20d 10h 17m 0s

sidekiq-retry-table.rb

#!/usr/bin/env ruby

def rand(max)
  max / 2
end

# From: https://github.com/mperham/sidekiq/blob/8e3dd2e6e898869b5026a76d2e01634737f41744/lib/sidekiq/job_retry.rb#L219-L226
def delay_for(jobinst, count, exception)
  jitter = rand(10) * (count + 1)
  if jobinst&.sidekiq_retry_in_block
    custom_retry_in = retry_in(jobinst, count, exception).to_i
    return custom_retry_in + jitter if custom_retry_in > 0
  end
  (count**4) + 15 + jitter
end

def format_duration(i)
  days = i / 86400
  hours = i / 3600 % 24
  minutes = i / 60 % 60
  seconds = i % 60
  "#{days}d #{hours}h #{minutes}m #{seconds}s"
end

0.upto(24).each do |i|
  new_delay = delay_for(nil, i, nil)
  previous_delay = i.downto(0).map { |j| delay_for(nil, j, nil) }.sum
  puts "#{(i + 1).to_s.rjust(2)} | #{format_duration(new_delay).rjust(18)} | #{format_duration(previous_delay).rjust(18)}"
end