Lagging on playtime

[xasans]

Hi @vi3itor i build project for windows but game is lagging on the playing match. Is it normal?

[vi3itor]

Hi!
No, it shouldn't lag unless you have a low-spec PC or running it in the virtual machine. The other reason might be Debug build: on one of the machines, when I used cmake, that was installed with Visual Studio, it built Debug version even when I passed the --Release flag. It was solved by installing the latest version of CMake.
Can you try running the initial version of the game, compiled and published by Bastiaan?

[vi3itor]

You can find it attached. I had to compress rar archive into zip, because GitHub doesn't support attaching rar-files.
gameplayfootball_beta2v02_windows.zip

[acoppola]

Another reason is that the game choose automatically the integrated graphics if you are on a system that have an integrated and a discrete videocard (some laptops and PCs).
For nVidia users go to the control panel and add your executable to the list and in order to run the game with graphic card.

[vi3itor]

Thank you Antonio for the valuable comment! I will add it to the installation instructions.

[xasans]

@vi3itor Yes i have tried compiled version by Bastiaan and works good.
@acoppola Yes my videocard is integrated and i add game to control panel of videocard but lagging doesn't stop
My CPU Intel Core i3-10100 with Intel UHD 630 videocard

[acoppola]

630

if you have only an integrated videocard performance isn't good. If you have an integrated and a discrete videocard (like me, Intel integrated and GeForce 840M) you should add the exe path in nvidia control panel to use the latter.

[xasans]

OK @acoppola but why does version of Batsiaan plays fine on my pc?

[acoppola]

@xasans dunno, can be that Bastian one use SDL 1.2, or it was compiled in a different way, or other stuff (there were a lot of changes). I had slowdowns and I solved that way.

[xasans]

@acoppola So did you compile on windows or other OS?

[vi3itor]

@xasans Try applying @WesleyKhoiVo's pull request #2 and please report your CPU usage. I will also publish the binaries tomorrow so you can test current version on your system.
I am also planning to disable logging, which should speed up the game.

[VOM7HC]

I just improve it minor.

But I think we must change mathematics formula so much from float to integer. Because Bastiaan used too much float - double math, but CPU is better calculate integer.

For example:
number * 0.5 = half number => number / 2 = half number (if it just 2 - integer, no need cast number to float like 0.5)

Useful link:
Floating point unit
FLOPS

[VOM7HC]

One of reasons I think Bastiaan's compiled version working better is MSVC and Mingw. Now Vi3itor version is built from MSVC and Bastiaan is Mingw, that why his code can use some VLAs.

I don't say we should be compile on Mingw and VLAs (which is bad code pattern - not thread safe from C99 not C++) and a lot of AAA game for Windows is compiled with MSVC instead of MingW, but may be this is the reason why performance is dropped (since he has optimized his code on MingW instead MSVC).

Why aren't VLAs in C++

[vi3itor]

Yeah, it would be interesting to see to what extent VLAs affect the performance.

[VOM7HC]

Yeah, it would be interesting to see to what extent VLAs affect the performance.

Yeah, Array allocated in Stack and Vector is allocated in both Heap and Stack (although it was introduced as alternative Array).

When vectors are allocated, do they use memory on the heap or the stack?

[vi3itor]

@xasans I have published the binaries, you can download and run it on your machine.

An important question: have you tried to decrease the screen resolution? In the binaries above, I set 1280x720 in the config by default. You can try other resolutions supported by your machine (Settings -> Graphics).