While moving the loop into Julia (as others suggested) is probably the better option, an alternative you could consider is DaemonMode: https://github.com/dmolin

While moving the loop into Julia (as others suggested) is probably the better option, an alternative you could consider is DaemonMode: https://github.com/dmolina/DaemonMode.jl https://github.com/dmolina/DaemonMode.jl I.e., have a background Julia process so that you only have to pay the precompile cost once.