I want to talk about how much CPU/GPU time an activity requires. Shall I call it "computational budget", "computing budget", or "computation budget"?

Both terms have around 20k results on Google.

https://en.wikipedia.org/wiki/Optimal_computing_budget_allocation talks about both computational budget and computing budget in a seemingly interchangeable way.

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    [H]ow much CPU/GPU time an activity requires makes me think it's more like it's "computation cost". – Damkerng T. Mar 29 '15 at 19:20
  • @DamkerngT. Thanks, good point. I guess We could extend the question to: Computational budget vs. computing budget vs. computation budget :) – Franck Dernoncourt Mar 29 '15 at 19:31

Computational budget vs. computing budget vs. computation budget

Let's look at the dictionary definitions:

Of, relating to, or using computers.

the use or operation of computers.

the use of computers, especially as a subject of research or study.

So computing is a narrower field than computational, and is pretty much the same as computation.

You are talking about the time required to run on a computer, so I would say that Computing fits best.

The computing budget is 11 hours

budget doesn't really fit here.

allow or provide a particular amount of money

it is specifically referring to money, and you want time. Maybe allowance works better:

the amount of something that is permitted

but I would simply say:

The computing time required is 11 hours.

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