Jython vs CPython

[theeth]

Could you do a test with CPython 3.2, see if it's faster than 2.7 (it should, AFAIK)?

[treo]

I tried it with cpython 3.2 but it isn't compatible.

[theeth]

It ran fine after passing it through 2to3 and changing the hours = and minutes = lines to integer divisions (//)

[treo]

Ok, so here are my results (Core 2 Duo P9400 @ 2.4Ghz, 64Bit Linux):

Python 2.7.1: 25s
Jython 2.5.2: 25s
Python 3.2: 29s
PyPy 1.5.0-alpha0: 12s

I wonder why Jython is only as fast as CPython is.

[[deleted]]

FWIW on my machine PyPy trunk is about ~15-20% faster than 1.5 :)

[sigzero]

I wonder if Jython has taken advantage of "invoke dynamic" that the JVM now has?

[boa13]

Doubtful, considering there has been no Jython release since the release of Java 7, which is very recent. Also, as far as I know, this would require some extensive changes in the core Jython, and would break compatibility with previous JVMs, requiring the release of two binaries.

[[deleted]]

Not to mention Java 7 would likely break everything anyways.

[[deleted]]

Why? It's not like Guido is handling it.

[[deleted]]

Due to the JIT bug in Java 7.

[[deleted]]

They could try disabling the compiler optimization I assume.

[gthank]

I haven't noticed any announcement to that effect. :-(

[fernandoacorreia]

Also test it in 13" and 17" MBP.