Does circle ci charges credits on the idle time in parallel mode

I’m seeing that my parallelism workflows have a huge idle time.
Not sure if Circle CI charges credits on the idle time or not.
I have looked through the doc and found nothing on this topic.

The example in the doc stated that for 2 parallel jobs with 1250minutes each will be counted as 2500 minutes against the credit but it didn’t talk about what if the jobs run with 1250minuts on one and 1200minutes on the other.

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Hello, can someone from CircleCI answer this?

Hello

You are not charged for the idle time, each parallel run (task) is only charged for the time each task ran - NOT the total job time x number of tasks.

So if a job has a parallelism of 2 and one run took 20 seconds and the other run took 40 secdons - then 60 sections of time will be charged not 80.

Kind Regards
Owen Oliver