threading vs multiprocessing in python

• threading in python is slower due to the GIL
• threading is better for IO-bound (waiting for input, such as a database or network call) applications
• multiprocessing is better for CPU-bound applications (single-core is slow)
• thradeoff for multiprocessing is that you need MUCH more ram to hold multiple copies of your data
• consider turning off swapiness if disk IO becomes a limitation