1.3 on Ubuntu - half as slow as 1.2?

stodge · Post by **stodge** » Sat Mar 17, 2007 1:28 am

I just built Irrlicht 1.3 on Ubuntu and the terrain demo (12) runs at 190fps, which is half the rate I used to get in 1.2. Anyone else experience this?

Cheers

randomMesh · Post by **randomMesh** » Sat Mar 17, 2007 1:32 am

Wow, fast. I get ~70 fps. (ATI Radeon 9000)

No difference between Irrlicht 1.2 and 1.3.

greenya · Post by **greenya** » Sat Mar 17, 2007 3:42 am

stodge wrote:Anyone else experience this?

Me too.

I have moved to irrlicht 1.3, fixed very small compatibility points ( like EDT_SOFTWARE2 now called as EDT_BURNINGSVIDEO ), recompiled all and get fps slow down in 4 times (!) (( i was getting 30 fps in the scene places where with irrlicht 1.2 i getting 110-120 fps )).

confused

p.s.:
terrain rendering demo in irr1.2 shows 60-75 fps, in irr1.3 -- 80-95 fps

tested on radeon x200m, winxp

hybrid · Post by **hybrid** » Sat Mar 17, 2007 4:45 pm

I just ran all examples in DX9 and OpenGL for plain Irrlicht 1.2 and 1.3. The only noticable slowdown was for Collision and MeshViewer (ex. 7 and 9), while all others were faster. All tests made on a Notebook with ATI 9000 chip.
The reasons for the two examples being slower might be
a) the changes in OnAnimate and OnRegister which were meant to fix some inconsistencies, but as pointed out by Luke now do a double animation in most render phases
b) the GUI changes (most important for text) which is not yet optimized internally
I'll check this stuff under Linux as well, but I have no Linux machine at hand right now.

stodge · Post by **stodge** » Sat Mar 17, 2007 9:10 pm

I'll see if I can profile it on Linux in the coming weeks.

Ambassador · Post by **Ambassador** » Sat Mar 17, 2007 11:14 pm

Haven't measured framerates, but for some reason on Kubuntu Linux, the compiled static library of irrlicht now takes 30+ mb and is very slow when linking... Troublesome if you have to compile your project very frequently when developing.

CuteAlien · Post by **CuteAlien** » Sat Mar 17, 2007 11:40 pm

Seems like the Makefile no longer uses -O3 -fexpensive-optimizations as default settings. This explains the bigger size, but could also explain the slower speed.

Try setting NDEBUG before compiling irrlicht.
Just type the following in the console before calling make:

Code: Select all

export NDEBUG=1

Ambassador · Post by **Ambassador** » Sun Mar 18, 2007 12:00 am

@CuteAlien

Nice, that worked =D.

hybrid · Post by **hybrid** » Sun Mar 18, 2007 9:04 am

IIRC the standard setting was just without -g last time, now it's with -g. The expensive-optimizations were only for the C code and still are. But maybe some more targets would help.

Irrlicht Engine

1.3 on Ubuntu - half as slow as 1.2?

1.3 on Ubuntu - half as slow as 1.2?

Re: 1.3 on Ubuntu - half as slow as 1.2?