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Rounding Save Computing Power?


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Dana86,

Given that a floating point number takes the same amount of space in memory regardless of its actual value I would imagine the answer is "No", but I am quite ready to be proved wrong.

M23

Edit: Love the Dilbert!

Edited by Melba23

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It would be very simple to test by running 2 timed runs, with a subset of the data, one with rounded floats and one without.

Let's assume that it did make a difference, which I don't think it does for the reason stated above, the answer to your question would still be relevant to your data set and the logic used to process it.  That's because you would have to offset the amount of "computing power" saved by rounding the floats with the amount of "computer power" used to round the floats to know for sure.  So, assuming again that it made a difference, no one would be able to accurately answer the question without testing it on your data using your processing logic.

Edited by TheXman
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4 hours ago, Dana86 said:

Does anyone know if computing power is reduced when rounding floats into smaller decimal places? 

Depends how much you round, and how much processing is involved.

For instance, if you can round to integers and the interim processing doesn’t create more fp numbers, then very possibly.

To know for sure, we need an example of the processing and the tolerable precision loss involved.

 

Code hard, but don’t hard code...

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your rounding adds compute time so probably uses more power if anything. but for all intents and purposes I don't think it amounts to anything significant

Edited by Earthshine

My resources are limited. You must ask the right questions

 

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