patch 9.0.0632: calling a function from an "expr" option has overhead Commit: https://github.com/vim/vim/commit/87b4e5c5db9d1cfd6f2e79656e1a6cff3c69d15f Author: Bram Moolenaar <Bram@vim.org> Date: Sat Oct 1 15:32:46 2022 +0100 patch 9.0.0632: calling a function from an "expr" option has overhead Problem: Calling a function from an "expr" option has too much overhead. Solution: Add call_simple_func() and use it for 'foldexpr'

#!/usr/bin/python
#
# Program that writes a number to stdout repeatedly
#
# This requires Python 2.6 or later.

from __future__ import print_function
import sys
import time

if __name__ == "__main__":

    done = 0
    while done < 10:
        done = done + 1
        print(done)
        sys.stdout.flush()
        time.sleep(0.05)  # sleep 50 msec