Asdf

The language for this group is english, maybe you got confused :P

Sorry

Asdf

I see. printf is way faster than ostream

Why you want speed? is not better easy to use

many

Why you want speed? is not better easy to use

One of the reasons of implementing in C/C++ is runtime performance. For algorithmic stuff, I will use python cuz it's neat (slower though) and I can focus on algorithm.

zed

Why you want speed? is not better easy to use

speed? printf easy? iostream speed & easy? fmt

Asdf

One of the reasons of implementing in C/C++ is runtime performance. For algorithmic stuff, I will use python cuz it's neat (slower though) and I can focus on algorithm.

In this case is about nano seconds. I think it's not a good choice

jcjordyn120

One of the reasons of implementing in C/C++ is runtime performance. For algorithmic stuff, I will use python cuz it's neat (slower though) and I can focus on algorithm.

eh python isn't slow enough for me to care about.

Asdf

speed? printf easy? iostream speed & easy? fmt

I don't know fmt but sound great

Asdf

eh python isn't slow enough for me to care about.

Good point

David

But if you care about performance, you will not be printing stuff to stdout frequently

jcjordyn120

But if you care about performance, you will not be printing stuff to stdout frequently

eh

David

eh

¿?

jcjordyn120

what

David

@jcjordyn120 Basically, if printing to screen is slow, print less.

jcjordyn120

ah, I'd rather more info then a little more speed.

jcjordyn120

(with a quiet mode of course)

Asdf

I/O it's low

David

#include <iostream> #include <stdio.h> int main() { for(unsigned i = 0; i < 9000000; i++) printf("Hello"); // std::cout << "Hello"; compiled with g++ 7 and -O3 the difference is about 0.001 second, and nobody calls std::cout so many times

David

ah, I'd rather more info then a little more speed.

Then do like all the logging libraries, set log levels so you can decide when you want to have a lot of info, and when not.

jcjordyn120

Then do like all the logging libraries, set log levels so you can decide when you want to have a lot of info, and when not.

I'm old school, I just always log unless -q is given.

David

@jcjordyn120 But if you have a program which compress some file for example, you will not be printing for each iteration of the algorithm, so the performance impact in this example is totally negligible

Asdf

I'm old school, I just always log unless -q is given.

that sound like bad school, not old

jcjordyn120

@jcjordyn120 But if you have a program which compress some file for example, you will not be printing for each iteration of the algorithm, so the performance impact in this example is totally negligible

yeah

jcjordyn120

that sound like bad school, not old

eh it works.

Asdf

eh it works.

I know, but is not the best

David

I'm not an expert, but if someone decides to change from std::cout to printf to improve the performance of their system, is doing something very wrong.

jcjordyn120

I know, but is not the best

and it's simple ;P

Asdf

and it's simple ;P

Like iostream

jcjordyn120

I'm not an expert, but if someone decides to change from std::cout to printf to improve the performance of their system, is doing something very wrong.

I don't even bother with things like that.

jcjordyn120

like if it was 1 vs 5 seconds then maybe i'd change, but the difference is so small it's pointless.

David