bugGNU Astronomy Utilities - Bugs: bug #56259, Arithmetic: more time operating...


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bug #56259: Arithmetic: more time operating with int32 than float32

Submitted by:  Raul Infante-Sainz <infantesainz>
Submitted on:  Fri 03 May 2019 07:02:57 AM UTC
Category:  Arithmetic Severity:  3 - Normal
Item Group:  * Addition(s) Status:  None
Privacy:  Public Assigned to:  None
Open/Closed:  Open
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Fri 03 May 2019 07:02:57 AM UTC, original submission:  

After some test in which very simple operation (subtraction of images) were done, the results were that considering `int32' data type was more time consumption than using `float32'.

For example:

astarithmetic im3.fits im4.fits float32 float32 -

finished in 0.111564. While

astarithmetic im3.fits im4.fits int32 int32 -

finished in 0.120998.

Note that images are different names but the size is the same.
That difference in time makes no sense and this overhead along big projects will cause a lot of extra time in processing data.

Raul Infante-Sainz <infantesainz>
Project Member


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