NOTE: Defects and feature requests described below represent specific issues with specific test cases. It is difficult to succinctly describe an issue and how it impacted the specific test case. Some of the issues listed may impact multiple architectures, operating systems, and/or languages. If you have any questions about the issues discussed in this report, please post on the user forums, http://software.intel.com/en-us/forums or submit an issue to Intel® Premier Support, https://premier.intel.com.
Data Fitting functions in Intel® MKL provide spline-based interpolation capabilities that can be used for spline construction (Linear, Cubic Quadratic etc.), to approximate functions, function derivatives or integrals, and perform cell search operations.
The chart below shows the performance advantages of Intel® MKL Data Fitting functions over corresponding functions in GNU Scientific Library* (GSL*) for spline interpolation operations.