I recently made a very late upgrade from IPP 6.1 to IPP 2019.5.281. I found out that the cross correlation API has gotten significantly slower compared to IPP 6.1, from 2-3ms to 5-6ms per run. I checked the ThreadedFunctionsList.txt for the IPP version 2019.5.281 and it appears that the cross correlation API no longer has multi-threading support. This is not a matter of not having threaded libraries installed; I have tested both the single and threaded libraries. Threading actually makes the API slower, 8-9ms.
Has internal multi-threading support really been removed from the cross correlation API? If so, what is the justification? Cross-correlation is a very widely used function, so it seems like an odd decision to make.
TCE Level:
TCE Open Date:
Tuesday, February 4, 2020 - 06:30
