Avisynth+

ryrynz · 13th February 2014, 11:15

Running Avsmeter with prefetch enabled causes the benchmark to slow down considerably.

Code:

[General info]
Log file created with:   AVSMeter 1.7.6 (AVS 2.6, x86)
Avisynth version:        AviSynth+ 0.1 (r1689, x86)


[Clip info]
Number of frames:                 1726
Length (hhh:mm:ss.ms):   000:01:11.989
Frame width:                       704
Frame height:                      480
Framerate:                      23.976 (2500000/104271)
Interlaced:                         No
Colorspace:                       YV12
Audio channels:                      2
Audio bits/sample:                  16
Audio samples/sec:               48000
Audio samples:                 3454656


[Runtime info]
Frames processed:               8 (0 - 7)
FPS (min | max | average):      0.017 | 237169 | 0.044
CPU usage (average):            6%
Thread count:                   27
Physical Memory usage (peak):   90 MB
Virtual Memory usage (peak):    173 MB
Time (elapsed):                 000:03:00.148


[Script]
SetFilterMTMode("", 2)
SetFilterMTMode("Directshowsource", 3)
Directshowsource("c:\1.mkv")
Deblock(20)
VagueDenoiser(threshold=1.0, nsteps=8, chromaT=0)
Hysteria(strength=0.2, highthresh=200)
Prefetch(4)


[Performance data]
       Frame    Frames/sec   Time/frame(ms)   CPU(%)   Threads   PhysMEM(MB)   VirtMEM(MB)
           0         0.017     60057.016993        0        32            82           168
           1         0.017     60014.952892        0        28            88           171
           2       171.206         5.840931        0        28            88           171
           3         8.837       113.165406       12        28            90           173
           4     33203.609         0.030117       12        28            90           173
           5    237168.577         0.004216       12        28            90           173
           6        83.888        11.920692       12        28            90           173
           7         0.017     59944.863827        0        27            90           173

Even just having deblock as the only filter with the prefetch call causes it to lag too, so it appears directly related to the prefetch call.
This script using Avisynth 2.6MT finishes in 33 seconds, avs+ without the prefetch call finishes it in 40 seconds.