The numerical integration with Calcpad was tested with over 700 integrals

[Proektsoftbg]

Numerical integration with Calcpad was tested with over 700 pre-solved integrals. The results were summarized in the following document:

https://github.com/Proektsoftbg/Calcpad/blob/main/Examples/Tests/Integration-test-results.pdf

The results from Calcpad were compared with the theoretical ones and the relative errors were evaluated. Most results were obtained with relative errors of 10^-15 to 10^-16. Only a few had errors of 10^-14 or a little greater.

This demonstrates that the method for error estimation has been properly selected. The software does not perform unnecessary iterations (that may reduce the performance) and the obtained precision is equal to or higher than the desired one.

You can also download the source code of the test worksheet:
https://github.com/Proektsoftbg/Calcpad/blob/main/Examples/Tests/Integration%20tests.cpd