[Jython-users] 2.7.1 significantly slower than 2.7.0

[Randall Wood]

I have a process that uses Jython to check that files are being checked into a SCM using the correct line ends (its a Java test that uses Jython, embedded using JSR 223, to run 29057 tests. Each test is the following Jython script (written on the fly in Java where PATH is the file to check and changes every time):

import os
failing = False
if "\r\n" in open(os.path.normpath(PATH), "rb").read():
failing = True

This has the following runtimes (in seconds) on the same computer with no other changes than Jython version:

Jython 2.7.0: 89.442 (~1.5 minutes)
Jython 2.7.1: 10,788.489 (~3 hours or ~120 times as long as 2.7.0)

What could be causing this discrepancy (is there something I can do), and what do you need me to also test to include in a bug report?

Randall Wood
JMRI Developer - http://jmri.org
Alexandria Software - http://alexandriasoftware.com
Northern Virginia NTRAK - http://nvntrak.org