lua python generators performance

lua_python_generator_performance.py

# This demonstrates the speed difference
# between lua coroutines vs python vs numba
# generators
# by: Cody Kochmann

In [1]: import lupa

In [2]: lua = lupa.LuaRuntime(unpack_returned_tuples=T
    ...: rue)

In [3]: lua_fib = lua.eval('''
    ...: function()
    ...:   return coroutine.create(function ()
    ...:       local prev = 0
    ...:       local current = 1
    ...:       local placeholder = current
    ...:       while true do
    ...:           current = current + prev
    ...:           prev = placeholder
    ...:           coroutine.yield(current)
    ...:           placeholder = current
    ...:       end
    ...:   end)
    ...: end
    ...: ''')

In [4]: def py_fib():
    ...:     prev = 0
    ...:     current = 1
    ...:     placeholder = current
    ...:     while True:
    ...:         current += prev
    ...:         prev = placeholder
    ...:         yield current
    ...:         placeholder = current
    ...: 

In [5]: import generators

In [6]: generators.performance_tools.runs_per_second(
    ...:   lua_fib().coroutine()
    ...: )
Out[6]: 3257785

In [7]: generators.performance_tools.runs_per_second(
    ...:   py_fib()
    ...: )
Out[7]: 156871

In [8]: generators.G(py_fib()).first(50).last()
Out[8]: 20365011074

In [9]: generators.G(lua_fib().coroutine()).first(50).
    ...: last()
Out[9]: 20365011074 

In [10]: import numba

In [11]: numba_fib = numba.jit(py_fib)

In [12]: generators.performance_tools.runs_per_second(
    ...:   numba_fib()
    ...: )
Out[12]: 7240610

In [13]: generators.G(numba_fib()).first(50).last()
Out[13]: 20365011074