@programminginc - страница 2451

MᏫᎻᎯᎷᎷᎬᎠ

I wish if Epochs were included agg

Artöm

Are cross-epochs abi/mangling issues solved?

MᏫᎻᎯᎷᎷᎬᎠ

I don't know 🤷🏻‍♂

MᏫᎻᎯᎷᎷᎬᎠ

But At a high view Epochs are the only salvation to C++ or it will get kicked by Rust soon

Alex

string s(1, str[5]) // What is this line doing?

init s with str[5] char

Anonymous

We discussed it earlier with Madhu in this chat that he had different results in his tests, and also one colleagues tested it in wandbox and results there were almost reverse (no difference where my tests shown big difference, and logical AND faster 3 times when the check almost always fails). So as Madhu said earlier it is dependent on different factors including the processor architecture and prediction algorithms used in it.

yes i read those. but i thought the result was unpredictable more because you weren't controlling for one specific thing.

Anonymous

i just ran my code on wandbox 10 times with both clang and gcc

Anonymous

the results are consistent

Anonymous

My statement reflections were regarded But here You have Standard modular library Contracts Pattern matching

I do not think that Pattern Matching will make it..

Anonymous

ran 30 more times with different probabilities

Anonymous

still consistent

Pavel

the results are consistent

Yes, tried it also several times and get & faster with your tests and slower with mine, that's interesting

Anonymous

Yes, tried it also several times and get & faster with your tests and slower with mine, that's interesting

yes. try it on your own pc and godbolt too

Anonymous

and use the CUSTOMISE HERE to change the probabilities

Anonymous

even with a 100% chance of failing at the first short circuit point, && is twice as slow as &

Pavel

yes. try it on your own pc and godbolt too

on my PC it gives 4.5 times difference on average

Anonymous

on my PC it gives 4.5 times difference on average

i tested some more with 40-30-20-10-0 on wandbox. with gcc & was more than 10 times faster every time, with clang it was 2-3 times faster (clang's & was around 5 times slower)

Anonymous

i also tested some in debug mode instead of -Ofast -march=native

Anonymous

both became slower, but & was always much faster

Anonymous

i also tested some in debug mode instead of -Ofast -march=native

Don't use -march=native

Anonymous

It'll often generate worse performing code

klimi

Don't use -march=native

Oh really?

Anonymous

Oh really?

Yes

Anonymous

It doesn't take into consideration that certain workloads while technically faster to execute may slow down the program

Anonymous

Even on android we specifically target code written for the CPU to begin with and only compile that with -march=native

Anonymous

-march=native will almost always produce a program that's slower

klimi

But gentoo uses it as default to compile everything

Noor

QtCreator: How to define more than one functions at once?

MᏫᎻᎯᎷᎷᎬᎠ

QtCreator: How to define more than one functions at once?

Do you mean function overloading?

MᏫᎻᎯᎷᎷᎬᎠ

int foo(); void foo(int); double foo(char c, bool);

Noor

Do you mean function overloading?

No, my english is bad. Its when you hover function declaration then theres "add definition" option. Is there any way to do all undefined functions at all once.