It's a great time to bring this up because I'm currently investigating various
start-up time issues and trying to improve our startup time. I'll give you a
breakdown of what I've discovered so far:
Various reflection that we do over types:
This includes over modules (SystemState,
built-ins, re, etc...)
Over types for creating "DynamicType"s: object,
string, PythonFile, etc... - these are the types we need to startup and display
the logo.
JITing methods:
Not on hello world, but on a more complex
scenario, I know we JIT 2500 methods on startup on the desktop CLR (this is
loading the Python version of the chess API shown at MIX - but not actually
running it). Obviously that's going to take some time too. W/o an ngen's
mscorlib we'll JIT something like 4000 methods.
There's also some little things here and there but my numbers show JITing is
representing around 70% of our startup time. Being as fast as CPython might be
tough but we certainly want to do better than where we are.
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of C L
Sent: Tuesday, July 17, 2007 2:10 AM
To: [email protected]
Subject: [IronPython] IronPython Start-up Time
Hello,
playing around a bit with IronPython I noticed that the start-up time is
quite long
Something around ~12s for the initial launch and around ~3,5s for each following
launch executing
----
import sys
sys.exit(0)
----
with IronPython-2.0A2\ipy.exe (on a Core Duo 2Ghz 2GB)
I am not complaining, just curious.
Is this simply because loading the CLR/DLR takes so much time?
And what is with the 3.5s for successive start-ups?
For comparison CPython needs ~2s for the initial and
~0.2s for successive start-ups.
Regards,
Claudius
Btw I used the simple C++ program
----
// Compile with
// cl /Feuxtime.exe /EHsc uxtime.cpp
//
// uxtime.exe "PATH_TO_IronPython\ipy.exe simplyExit.py"
//
#include <stdio.h>
#include <ctime>
#include <stdlib.h >
int main( int argc, char**argv)
{
int c_start = clock();
system( argv[1]);
int c_end = clock();
printf("%d\n", ((double)(c_end - c_start)) / CLOCKS_PER_SEC );
}
----
_______________________________________________
users mailing list
[email protected]
http://lists.ironpython.com/listinfo.cgi/users-ironpython.com
