I just installed 4-22, tried it out, read all 30+ pages, and was about to report my result. Well I find the 4-30 release! That was fast.
OK on my c2075 card I get 168 mH/s. On cgminer or ufasoft I get 75mH/s. That is 120% boost!
I don't find any performance difference between the 4-22 and the 4-30 version (actually the CPU usage reported by win8 increased from 17% to 18%).
C:\Users\mh\cm>cudaminer -o http://ltc.kattare.com:9332 -O xx:xx -d 1 -l 112x8 -i 0 -C 2
*** CudaMiner for nVidia GPUs by Christian Buchner ***
This is version 2013-04-30 (alpha)
based on pooler-cpuminer 2.2.3 (c) 2010 Jeff Garzik, 2012 pooler
Cuda additions Copyright 2013 Christian Buchner
My donation address: LKS1WDKGED647msBQfLBHV3Ls8sveGncnm
[2013-05-01 02:42:36] 1 miner threads started, using 'scrypt' algorithm.
[2013-05-01 02:42:39] Long-polling activated for http://ltc.kattare.com:9332/LP
[2013-05-01 02:42:39] GPU #1: Tesla C2075 with compute capability 2.0
[2013-05-01 02:42:39] GPU #1: interactive: 0, tex-cache: 2D, single-alloc: 1
[2013-05-01 02:42:39] GPU #1: using launch configuration 112x8
[2013-05-01 02:42:40] GPU #1: Tesla C2075, 28672 hashes, 71.26 khash/s
[2013-05-01 02:43:05] GPU #1: Tesla C2075, 4214784 hashes, 168.68 khash/s
[2013-05-01 02:43:06] LONGPOLL detected new block
[2013-05-01 02:43:06] GPU #1: Tesla C2075, 172032 hashes, 145.91 khash/s
[2013-05-01 02:43:45] GPU #1: Tesla C2075, 6651904 hashes, 169.07 khash/s
[2013-05-01 02:43:46] accepted: 1/1 (100.00%), 169.07 khash/s (yay!!!)
[2013-05-01 02:44:04] LONGPOLL detected new block
[2013-05-01 02:44:04] GPU #1: Tesla C2075, 3153920 hashes, 168.32 khash/s
Just for comparison this is from 4-22 version
C:\Users\mh\cm>cudaminer -o http://ltc.kattare.com:9332 -O xx:xx -d 1 -l 112x8 -i 0 -C 2
*** CudaMiner for nVidia GPUs by Christian Buchner ***
This is version 2013-04-22 (alpha)
based on pooler-cpuminer 2.2.3 (c) 2010 Jeff Garzik, 2012 pooler
Cuda additions Copyright 2013 Christian Buchner
My donation address: LKS1WDKGED647msBQfLBHV3Ls8sveGncnm
[2013-05-01 02:20:11] 1 miner threads started, using 'scrypt' algorithm.
[2013-05-01 02:20:12] Long-polling activated for http://ltc.kattare.com:9332/LP
[2013-05-01 02:20:12] GPU #1: Tesla C2075 with compute capability 2.0
[2013-05-01 02:20:12] GPU #1: interactive: 0, tex-cache: 2D, single-alloc: 1
[2013-05-01 02:20:12] GPU #1: using launch configuration 112x8
[2013-05-01 02:20:12] GPU #1: Tesla C2075, 28672 hashes, 74.79 khash/s
[2013-05-01 02:20:37] GPU #1: Tesla C2075, 4186112 hashes, 168.67 khash/s
[2013-05-01 02:20:38] accepted: 1/1 (100.00%), 168.67 khash/s (yay!!!)
[2013-05-01 02:21:05] GPU #1: Tesla C2075, 4730880 hashes, 168.81 khash/s
[2013-05-01 02:21:06] accepted: 2/2 (100.00%), 168.81 khash/s (yay!!!)
[2013-05-01 02:21:26] GPU #1: Tesla C2075, 3239936 hashes, 168.99 khash/s
[2013-05-01 02:21:26] accepted: 3/3 (100.00%), 168.99 khash/s (yay!!!)
I have tried to optimize the -l S option. At S224x4 there was a maximum that is slightly slower than simple -l 112x8.
The -i 0 -C 2 option seems to add a few mH/s.
Thank you Christian. Donation is coming your way (once I have any in hand)