DGBobIM (Intel QuickSync) slower than Yadif?!

[shae]

I thought a hardware-accelerated deinterlacer would be quicker than software, yet in my casual testing I'm seeing the opposite on an Intel i5-3210M.

Maybe unexpected side issues like buffer copying or compiler optimization?

Yadif: ~370 FPS
DGBobIM: ~290 FPS


AviSource(...) # 720x576 50i DV video
ConvertToYV12(interlaced=true)

# option 1
LoadPlugin("DGBobIM.dll")
DGBobIM(mode=1,order=1)

# option 2
LoadCPlugin("yadif.dll")
Yadif(mode=1)


Using these:
http://avisynth.org.ru/yadif/yadif17.zip
http://rationalqm.us/dgdecim/dgbobim_101.rar
AviSynth 2.6.0.6 32-bit (single-threaded)
AVS2AVI 1.39

[Asmodian]

That CPU is quite old, with very slow integrated graphics. QuickSync is probably limited by the shader driven portion of deinterlacing. Does there appear to be a quality difference between the two?

[shae]

In my limited comparisons, maybe the Intel looks a bit less posterized.