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We have heard from lots of different people about the difference in performance between Windows and Linux, next up is Alien: Isolation.

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Feral Interactive ported Alien: Isolation to Linux, and it was released on 27th October 2015 for us.

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tuubi Nov 18, 2015
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Quoting: sigzAt best you will have near same fps as in windows in some cases, most of times you will get lower fps, and you will never have a 30% more fps on linux than windows.
You might if someone had to port a Linux game written around an OpenGL renderer to Windows using Direct3D, but that won't happen. You know, with OpenGL being cross-platform and all.
M@GOid Nov 18, 2015
If you play on a PC long enough, you now that PC games in general are bad programmed in first place. Companies will only do bug hunting and optimizations only when is lucrative enough to then.

Feral, Aspir, VP, etc do not have deep pockets or much man power to do their jobs. They will do a job and need to make a profit. If go after that last 30% loss means loose money, they will not do it. Simple as that.

Games in general do not complies wit OpenGL or DirectX to the letter, so they put the blame to the driver developer. If a game is famous enough, they will got a driver patch to correct the errors made by developers. You see this all the time in Windows. But if you are a indie, or you learn your job really well, or your games will never see high performance.

The Nvidia driver is more tolerant to programming errors, that is their advantage. The AMD driver needs more compliant code to work well, but that almost never happens because people thinks NvidiaGL means OpenGL...

The hope with Vulcan is that there will be official compliant tests, so game developers will not have the excuse to blame the video driver to their game bad performance.


Last edited by M@GOid on 18 November 2015 at 2:06 pm UTC
sigz Nov 18, 2015
Quoting: tuubi
Quoting: sigzAt best you will have near same fps as in windows in some cases, most of times you will get lower fps, and you will never have a 30% more fps on linux than windows.
You might if someone had to port a Linux game written around an OpenGL renderer to Windows using Direct3D, but that won't happen. You know, with OpenGL being cross-platform and all.

Well, Planetary Annihilation is a pure OpenGL game, it has been done with multiplatform in mind, I tested it under windows and I got 20% more fps than linux (Of course I talk about my system only, I didn't found any comparison benchmark)
tuubi Nov 18, 2015
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Quoting: sigz
Quoting: tuubi
Quoting: sigzAt best you will have near same fps as in windows in some cases, most of times you will get lower fps, and you will never have a 30% more fps on linux than windows.
You might if someone had to port a Linux game written around an OpenGL renderer to Windows using Direct3D, but that won't happen. You know, with OpenGL being cross-platform and all.

Well, Planetary Annihilation is a pure OpenGL game, it has been done with multiplatform in mind, I tested it under windows and I got 20% more fps than linux (Of course I talk about my system only, I didn't found any comparison benchmark)
That'll happen, depending on the driver/hw and the amount of optimization a developer puts in for a given platform. Also, not relevant to my hypothetical scenario at all.

Quoting: GuestFeral's version is called "indirectx". Unless that's been changed in recent times. I'm sure Feral will correct me if I'm wrong.
Ah, thanks for the info.

Quoting: Guestdx9 might well be easy enough, but dx11 isn't quite so simple. And you don't want to strip apart an entire game codebase to replace everything if you can avoid it - something like togl is really the only way to go.
You will get performance hits because of trying to essentially emulate how DirectX does things, and then there's the mess of converting HLSL bytecode to something GLSL compatible.
This was pretty much my point. There will be overhead if you emulate an incompatible API, source based or not.


Last edited by tuubi on 18 November 2015 at 2:33 pm UTC
leillo1975 Nov 18, 2015
Quoting: dubigrasuView video on youtube.com

War Thunder (awesome game) is a wrapped game, or a native port?
Xpander Nov 18, 2015
Quoting: leillo1975
Quoting: dubigrasuView video on youtube.com

War Thunder (awesome game) is a wrapped game, or a native port?
native. has opengl option for windows version also
Guest Nov 18, 2015
what about settings ? Sure people may not like to have to drop AA, but linux is behind in Multi sampling Antialiasing at the moment. Does it use it on this test ? If so then doing the test without may not be popular ( because people want the same quality across the board ) but it would at least identify how much of that 30% difference was down to a specific game setting.

Still, running 1080p 60fps with better than console graphics is entirely possible even with a 30% loss on a decent PC / Steam machine.
dubigrasu Nov 18, 2015
Quoting: mr-eggwhat about settings ? Sure people may not like to have to drop AA, but linux is behind in Multi sampling Antialiasing at the moment. Does it use it on this test ? If so then doing the test without may not be popular ( because people want the same quality across the board ) but it would at least identify how much of that 30% difference was down to a specific game setting.

Still, running 1080p 60fps with better than console graphics is entirely possible even with a 30% loss on a decent PC / Steam machine.
The settings were at max for all systems (yes AA enabled), read the video description for details.
adolson Nov 18, 2015
I kinda don't care. Even on my aging GTX660OC it performs well enough that I can play it, and that's all I need. I mean... What's the alternative, not play it? Buy it for my dusty PS3? I'm sure as hell not going to install Windows again, after 13 years without it.
omer666 Nov 18, 2015
It runs really great on my Core i7, GTX660 and 16Gb of RAM with everything maxed out and I am quite impressed with the graphics.
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