I’ll do some more tests but on a stock Mac Pro with the built in audiocard these are the results.
Renoise 1.9b2:
1 ms latency at 44.1 the total cpu was 25% No pops or crackles 
dayum! 
This was due to the new filters in the flanger FX. Fixed that, so that they are not calced when not used…
CPU_LOAD_BENCH.rns
Renoise 1.520 (1 CPU) : 31.0%
Renoise 1.800 (1 CPU) : 25.2%
Renoise 1.9b1 (1 CPU) : 30.8%
Renoise 1.9b2 (1 CPU) : 31.3%
Renoise 1.9b1 (2 CPU) : 16.8%
Renoise 1.9b2 (2 CPU) : 16.8%
i guess the single-threaded difference between 1.9b1 & b2 is probably within a margin, which can be regarded as “measurement fault”. they seem to be identically fast/slow.
the rather huge gap between 1.8 and 1.9b(1 CPU) does leave me pretty stunned though.
hope there’s still room for improvement?
As said above: thats just the newly introduced filter in the flanger. Fixed that for the next build…
oh, so i got you wrong since i thought this
was already related to 1.9b2…
very good news then.
CPU_LOAD_BENCH.rns
AMD Athlon 64 3200+
1GB RAM
SBLive 5.1
Wndows XP Pro
Renoise 1.5.2
samplerate: 44100
Latency: 28ms
CPU usage 70% and no pops or crackles
Why using 1.5 when 1.8 was released long time ago, and 1.9 is also soon here? 
Well just upgraded my system so i also have tested.
AMD ATHLON X2 6000+
2Gb RAM
M-audi Audiophile 192
WinXP Pro
44.100Hz
Latency 256 samples
Renoise 1.9b2
CPU_LOAD_BENCH.rns
2CPU 28%
1CPU 54%
Test.rns
2 CPU 21%
1 CPU 36%
Renoise 1.8
CPU_LOAD_BENCH.rns
1CPU 43%
Test.rns
1CPU 38%
Dual core threaded support in 1.9b2 works wonders i can see !! 
Also seems like cpu usage has gone a little down from 1.8 to 1.9b2
Regarding Test.rns :
With Latency 64 samples it is 2CPU 32% and 1CPU is 56% ! (1.9b2 smooooooth
at latency 64 samples i need to enable 2cpu support. With one cpu i get noise. but with 2 enabled it runs smooth.
that is fantastic latency !!
We should formalize and document these in a way which gives us an quick overview on what’s hot and what’s not. Perhaps a ranking in results from fastest to slowest - using 11ms as the primary benchmark.
Maybe Saint TakTik can write a quick benchmarking utility from within Renoise
because 1.5 is perfect for me and I don’t want to set up again the Renoise settings just because the newest 1.8 version.
but thanks
Other then your soundcard and maybe creating a new song template, what is there to set-up? The pros defenitely weigh up against the cons here.
CPU_LOAD_BENCH.rns
iMac 1.8 GHz G5
1.8, 77% at latency 30, 83% at latency 10
1.9 beta 2, unplayable at any latency, grinds my machine to a halt, 100% 
K, i read the part about the flanger…
I deleted all the flangers in the test song and the CPU usage was identical (80% at 10 ms latency)
As i understand it, the flanger will be fixed for beta3.
Can you make it even faster? I have a 800mhz G4 iBook and I’m petrified about running these tests on that machine.
Let me guess… hmm… 100% with or without the flanger? 
Here we go
System: Windows XP Pro
AMD Athlon XP 2400 +
512 Mb
Sound blaster live 24bit
ASIO 4ALL 2.6
test.rns 24ms 70% cpu (no glitches, pattern scrolling sometimes pauses)
CPU_LOAD_BENCH.rns 24ms 85% cpu (no glitches, lots more pattern scrolling pauses)
MacBook Pro, 2.33 GHz Core 2 Duo, 2 GB Ram, Mac OS X 10.4.9
While only running Renoise (cpu_load_bench.rns):
Latency 16 ms, 56.5% CPU Load
Latency 8 ms, 60.2% CPU Load
Latency 4 ms, 66.8% CPU Load
Latency 3 ms, 69.5% CPU Load
Latency 2 ms, 74% CPU Load – No crackles, but sound seems to be degrading slightly
Latency 1 ms, 84% CPU Load – Crackles, Unless performance
This is using the demo 1.8 version of Renoise. I’m still playing with it and trying to decide if it’ll work for me. Not sure if the full version has any performance improvements or not.
Robb
@ Robbneu, Renoise 1.9 which beta version is available for registered users now has multicore support. Performance will increase in your case.
With Renoise v1.9 b3.
CPU: Intel C2D E6600 @ 3.2GHz
Chipset: Intel 965
RAM: 2GB OCZ (CL 4)
Soundcard: Emu 1212m
Video: NVidia 7600GT
sample rate used 44100 Khz
CPU_LOAD_BENCH.rns
ASIO latency 10 ms CPU LOAD 13.7%
CPU_LOAD_BENCH.rns
Renoise 1.520 (1 CPU) : 31.0%
Renoise 1.800 (1 CPU) : 25.2%
Renoise 1.9b1 (1 CPU) : 30.8%
Renoise 1.9b2 (1 CPU) : 31.3%
Renoise 1.9b3 (1 CPU) : 21.8%
Renoise 1.9b1 (2 CPU) : 16.8%
Renoise 1.9b2 (2 CPU) : 16.8%
Renoise 1.9b3 (2 CPU) : 12.6%
that’s some nice improvement there.
even faster than 1.8 now, which is splendid!