[pypy-issue] [issue1067] Performance on Stack-Based VM machine

[Winston Ewert]

New submission from Winston Ewert <winstonewert at gmail.com>:

For me this runs 20x faster on Python 2.7.1+ then on PyPy 1.8

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files: go2.py
messages: 3993
nosy: pypy-issue, winstonewert
priority: performance bug
status: unread
title: Performance on Stack-Based VM machine

________________________________________
PyPy bug tracker <tracker at bugs.pypy.org>
<https://bugs.pypy.org/issue1067>
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import time

def execute(program):
    stack = []
    for op in program:
        if op == 'd':
            stack.append( 0 )
        elif op == 'e':
            stack.append( 1 )
        elif op == 'f':
            stack.append( stack.pop() + stack.pop())

def main():
    for generation in range(20000):
        execute('eefddffedff')

main()
t = time.time()
main()
print time.time() - t