Running cron every 5 minutes to NOT all run at the same time

[microSoftware]

Bull v4.10.4

I tried adding random delay from 0 to 5mn but doesn't work.
I tried adding new task at 0 to 20 seconds interval. But every time, the task say "will run at 3:05" or whatever multiple of 5: 3:10, 3:15, 3:20... So basically worker are idle for 5mn and then when it's 3:05 , all the workers execute at the same time and of course it takes more than 1mn to execute all the tasks so it's bad.

What i'd like is to evenly distribute the task in time. So the workers are always working.
So if i add a task at 3h08:10sec every 5mn. Then the task will be added for execution at 3h13:10sec and then 3h18:10
if i add another task at 3h09:30sec every 5mn. Then the task will be added for execution at 3h14:10sec and then 3h19:30

So naturally the task get evenly distributed overtime.

Which is not the case now. Now, if i add the task at 3h08 or 3h09. It will be executed at exactly 3h15 and then 3h20.
So all the task get executed at exactly the same time. So when you have thousands of tasks to be executed at the same time it's really not ideal.

Is there a way around this ?

Note: i use bull dashboard to check when the task will be executed in the future with the delayed tab.

[manast]

You can use the offset option in BullMQ to affect the time bin when a job is executed: https://api.docs.bullmq.io/interfaces/RepeatOptions.html#offset
In Bull, this option does not exist and will not be added as it is in maintenance mode.