Hi all,
I've been working at trying to get the fastest TV update rate possible
and am a little discouraged by my results so far. I developed a short
benchmark program and am curious what results might be obtained by
other machines. I have a P3-550 and obtained the following:
TV-Device Copy Test: Array Size: 512 13.520000 seconds
=> Frames/sec: 3.6982249 Frame time: 0.27040000
Video Xfer rate: 2908402.4 bytes/sec
TV Direct Test: Array Size: 512 13.290000 seconds =>
Frames/sec: 3.7622272 Frame time: 0.26580000
Video Xfer rate: 2958735.9 bytes/sec
If your time permits, I would appreciate knowing anyone else's results
and a brief mention of the computer used. My benchmarks were
identical for IDL 5.2 and 5.3.1. Thanks in advance.
Bill B.
============================================================ =================
; Benchmark test for window updating
PRO WIN_TEST, GROUP=Group
set_plot, 'win'
DEVICE, DECOMPOSED = 0 ; New for IDL 5.2
sz = 512
WINDOW, /FREE, /PIXMAP, XSIZE = sz, YSIZE = sz
pixmap0_id = !D.WINDOW
WINDOW, /FREE, XSIZE = sz, YSIZE = sz
pixmap1_id = !D.WINDOW
R = FINDGEN(256)
G = R
B = R
TVLCT, R, G, B ; Load these vectors into the color table:
s = 0 ; seed
data = (randomu(s, sz, sz, 3) * 255) ; create some initial data
; TV to pixmap and copy test -----------------------------
T0 = SYSTIME(1)
FOR I = 0, 49 DO BEGIN
WSET, pixmap0_id
;data = (randomu(s, sz, sz, 3) * 255)
;s = s + 1
TV, data, true = 3
WSET, pixmap1_id
DEVICE, COPY = [0, 0, sz-1, sz-1, 0, 0, pixmap0_id]
ENDFOR
T1 = SYSTIME(1)
fps = 50.0 / (t1 - t0)
print, 'TV-Device Copy Test: Array Size: ', sz, ' ',t1 - t0, '
seconds', ' => Frames/sec: ', fps, ' Frame time:', 1.0/fps
print, ' Video Xfer rate: ', DOUBLE(sz) * DOUBLE(sz) * 3D * fps, '
bytes/sec'
print
; TV direct test ------------------------------------------
T0 = SYSTIME(1)
FOR I = 0, 49 DO BEGIN
WSET, pixmap1_id
;data = (randomu(s, sz, sz, 3) * 255)
;s = s + 1
TV, data, true = 3
ENDFOR
T1 = SYSTIME(1)
fps = 50.0 / (t1 - t0)
print, 'TV Direct Test: Array Size: ', sz, ' ',t1 - t0, ' seconds', '
=> Frames/sec: ', fps, ' Frame time:', 1.0/fps
print, ' Video Xfer rate: ', DOUBLE(sz) * DOUBLE(sz) * 3D * fps, '
bytes/sec'
WDELETE, pixmap0_id
WDELETE, pixmap1_id
END
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