[Python-Dev] PEP 393 Summer of Code Project

[Scott Dial]

On 8/23/2011 6:38 PM, Victor Stinner wrote:
> Le mardi 23 août 2011 00:14:40, Antoine Pitrou a écrit :
>> - You could try to run stringbench, which can be found at
>>   http://svn.python.org/projects/sandbox/trunk/stringbench (*)
>>   and there's iobench (the text mode benchmarks) in the Tools/iobench
>>   directory.
> 
> Some raw numbers.
> 
> stringbench:
> "147.07 203.07 72.4 TOTAL" for the PEP 393
> "146.81 140.39 104.6 TOTAL" for default
> => PEP is 45% slower

I ran the same benchmark and couldn't make a distinction in performance
between them:

pep-393.txt
182.17  175.47  103.8   TOTAL
cpython.txt
183.26  177.97  103.0   TOTAL

pep-393-wide-unicode.txt
181.61  198.69  91.4    TOTAL
cpython-wide-unicode.txt
181.27  195.58  92.7    TOTAL

I ran it a couple times and have seen either default or pep-393 being up
to +/- 10 sec slower on the unicode tests. The results of the 8-bit
string tests seem to have less variance on my test machine.

> run test_unicode 50 times:
> 0m19.487s for PEP
> 0m17.187s for default
> => PEP is 13% slower

$ time ./python -m test `python -c 'print "test_unicode " * 50'`

pep-393-wide-unicode.txt
real    0m33.409s
cpython-wide-unicode.txt
real    0m33.489s

Nothing in it for me.. except your system is obviously faster, in general.

-- 
Scott Dial
scott at scottdial.com