max9111 questions

max9111 answers

• Cython function taking more time than pure python
• Optimal HDF5 dataset chunk shape for reading rows
• numpy faster than numba and cython , how to improve numba code
• Use numpy.tensordot to replace a nested loop
• Passing NumPy arrays as arguments to numba.cfunc
• Perfrom cumulative sum over a column but reset to 0 if sum become negative in Pandas
• Vectorize a 6 for loop cumulative sum in python
• Speed up random weighted choice without replacement in python
• Fast way to convert upper triangular matrix into symmetric matrix
• Why Python loops over slices of numpy arrays are faster than fully vectorized operations