On Friday, 1 March 2013 at 20:58:09 UTC, simendsjo wrote:
On Friday, 1 March 2013 at 20:50:15 UTC, Andrei Alexandrescu
wrote:
On 3/1/13 3:30 PM, cvk012c wrote:
Tried to port my SIP parser from Python to D to boost
performance
but got opposite result.
I created a simple test script which splits SIP REGISTER
message
10 million times. Python version takes about 14 seconds to
execute, D version is about 23 seconds which is 1.6 times
slower.
I used DMD 2.062 and compiled my script with options -release
and
-O. I used Python 3.3 64 bit.
I ran both scripts on the same hardware with Windows 7 64.
Add -inline to the options.
Andrei
--noboundscheck can also help if you don't mind missing the
safety net.
$ rdmd -O -release sip
22 secs, 977 ms, 299 μs, and 8 hnsecs
$ rdmd -O -release -inline sip
12 secs, 245 ms, 567 μs, and 9 hnsecs
$ rdmd -O -release -inline -noboundscheck sip
10 secs, 171 ms, 209 μs, and 9 hnsecs
On my hardware with -inline options it now takes about 15 secs
which is still slower than Python but with both -inline and
-noboundscheck it takes 13 secs and finally beats Python.
But I still kind of disappointed because I expected a much better
performance boost and got only 7%. Counting that Python is not
the fastest scripting language I think that similar Perl and Java
scripts will outperform D easily.
Thanks Andrei and simendsjo for a quick response though.
