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Reds, did you miss my earlier comment - while lvanlys.dll does not use multicore functions, the LabVIEW Multicore Analysis and Sparse Matrix Toolkit does. Despite X's comments on the lack of documentation, which are quite fair and accurate, I'm seeing huge speedups on my i7-12700F with 8P+4E cores (20 logical processors according to CPU Information). For a 1499x1499 CDB 2D array, the inbuilt NI FFT takes ~270ms, the MASM FFT takes ~20ms, and the MASM FFT on the same array as CSG takes ~11ms (the built-in FFTs don't support single-precision, but MASM does, and it's often all that is needed).