iB::Topic::C++ compiling really slow

	Damn Small Linux :: Damn Small Linux Board The DSL Forums

» Welcome Guest
[ Log In :: Register ]

Damn Small Linux Board » Non-DSL Topics » Programming and Scripting » C++ compiling really slow

		Mini-ITX Boards Sale, Fanless BareBones Mini-ITX, Bootable 1G DSL USBs, 533MHz Fanless PC <-- SALE $200 each!
		Get The Official Damn Small Linux Book. DSL Market , Great VPS hosting provided by Tektonic

[ Track this topic :: Email this topic :: Print this topic ]

Topic: C++ compiling really slow

< Next Oldest | Next Newest >

eedok

Group: Members
Posts: 7
Joined: Jan. 2005

Posted: Mar. 01 2006,06:59

when I compile hello world in C++ it takes like 12 seconds to compile

Code Sample

#include <iostream>
int main(){
std::cout << "Hello World!" << std::endl;
}

but when I program hello world in C it finishes in under a second

Code Sample

#include <stdio.h>
int main(){
printf("Hello World!\n");
return 0;
}

Why does the C++ version take so long to compile? Any ways to speed it up?
this is using the gcc1.dsl package

cbagger01

Group: Members
Posts: 4264
Joined: Oct. 2003

Posted: Mar. 01 2006,07:10

Maybe enable DMA for your hard drive. You can boot with:

dsl dma

to try this.

eedok

Group: Members
Posts: 7
Joined: Jan. 2005

Posted: Mar. 02 2006,05:27

there's no hard drive and I don't see how hard drive speed will change this as it's less than 1KB of a file.

_pathos

Group: Members
Posts: 91
Joined: Aug. 2005

Posted: Mar. 02 2006,07:00

C++ is just a lot more complicated.

The compiler has to do a lot of work processing the files included directly/indirectly by iostream:

#include <istream>
#include <ostream>
#include <ios>
#include <iosfwd>
#include <exception>
#include <bits/char_traits.h>
#include <cstdio> <---- even the stdio C header file
#include <bits/localefwd.h>
#include <bits/ios_base.h>
#include <streambuf>
#include <bits/basic_ios.h>

Linking the C std functions is a piece of cake. stdio includes only one or two basic files.

3 replies since Mar. 01 2006,06:59

< Next Oldest | Next Newest >

[ Track this topic :: Email this topic :: Print this topic ]

Damn Small Linux Board » Non-DSL Topics » Programming and Scripting » C++ compiling really slow