What would be the best way to provide this?
On Wed, Jan 15, 2014 at 8:39 AM, Maciej Fijalkowski <fij...@gmail.com>wrote: > On Tue, Jan 14, 2014 at 11:38 PM, Robert Grosse <n210241048...@gmail.com> > wrote: > > Hi, I have been trying to use Pypy to speed up the Krakatau decompiler > > (https://github.com/Storyyeller/Krakatau). It is a large, pure Python > > application with several compute intensive parts, so I thought it would > work > > well. Unfortunately, there is no clear speedup, and Pypy requires several > > times as much memory as well, making it unusual for larger inputs. > > > > For example, decompiling a quarter of ASM, I got the following results > > (execution time, memory usage) > > > > cpython 64 - 62.5s, 102.6kb > > cpython 32 - 69.2s, 54.5kb > > pypy 2.1.0 - 106.5s, 277.8kb > > pypy 2.2.1 - 109.2s, 194.6kb > > > > Sometimes, 2.2.1 is faster than 2.1.0, but they're both clearly much > worse > > than CPython. > > > > These tests were performed on Windows 7 64bit using the prebuilt 32bit > > binaries of Pypy. I tested the 32bit version of CPython too, to see if > the > > problem was a lack of 64bit support. However, CPython 32bit also vastly > > outperformed Pypy. > > > > Execution time was measured using time.time(). Memory usage was measured > by > > watching the Windows Resource Manager and recording the peak Private > value. > > Similar patterns were seen in Working Set, etc. > > > > I thought the increased memory usage at least might be explained by > constant > > overhead from compiled code or from it not running long enough to trigger > > full garbage collection. However, Pypy continues to use several times as > > much memory on much larger examples. > > > > Does anyone know what could be going on here? Pypy isn't normally slower > > than CPython. Is there a way for me to tell what the problem is? > > Hi. > > It depends on your workload a lot. If you want us to have a look into > it, you need to provide a clear and reproducible way to run a > benchmark. > > Cheers, > fijal >
_______________________________________________ pypy-dev mailing list pypy-dev@python.org https://mail.python.org/mailman/listinfo/pypy-dev
