I ran some quick tests of PNG vs. NCGM, and PNG was definitely slower, by about 4 times in my case. I can imagine the difference varies greatly by the visual complexity of the plot; the PNG driver must perform rasterization and anti-aliasing for everything, whereas I believe NCGM is a vector based format. 30 times though -- wow. Is this a question out of curiosity, or is this speed difference causing you grief? Rick On Jul 22, 2010, at 3:25 PM, wxtofly wrote:Hi, Have I set it up wrong, or is png output expected to be about 10-30 times slower than output to ncgm? The times below are from start of ncl to finish of each plot and are thus culmulative. As ncgm: (0) --- Single Parameter Plot end - Thu Jul 22 07:44:18 PDT 2010 WallClockElapseTime= 1 sec (0) --- Single Parameter Plot end - Thu Jul 22 07:44:19 PDT 2010 WallClockElapseTime= 2 sec (0) --- Single Parameter Plot end - Thu Jul 22 07:44:20 PDT 2010 WallClockElapseTime= 3 sec (0) --- Single Parameter Plot end - Thu Jul 22 07:44:20 PDT 2010 WallClockElapseTime= 3 sec (0) --- Single Parameter Plot end - Thu Jul 22 07:44:20 PDT 2010 WallClockElapseTime= 3 sec (0) --- Single Parameter Plot end - Thu Jul 22 07:44:21 PDT 2010 WallClockElapseTime= 4 sec (0) --- Single Parameter Plot end - Thu Jul 22 07:44:22 PDT 2010 WallClockElapseTime= 5 sec (0) --- Single Parameter Plot end - Thu Jul 22 07:44:22 PDT 2010 WallClockElapseTime= 5 sec (0) --- Single Parameter Plot end - Thu Jul 22 07:44:23 PDT 2010 WallClockElapseTime= 6 sec (0) --- Single Parameter Plot end - Thu Jul 22 07:44:24 PDT 2010 WallClockElapseTime= 7 sec (0) --- Single Parameter Plot end - Thu Jul 22 07:44:25 PDT 2010 WallClockElapseTime= 8 sec (0) --- Single Parameter Plot end - Thu Jul 22 07:44:25 PDT 2010 WallClockElapseTime= 8 sec As png: (0) --- Single Parameter Plot end - Thu Jul 22 14:03:14 PDT 2010 WallClockElapseTime= 27 sec (0) --- Single Parameter Plot end - Thu Jul 22 14:03:28 PDT 2010 WallClockElapseTime= 41 sec (0) --- Single Parameter Plot end - Thu Jul 22 14:03:39 PDT 2010 WallClockElapseTime= 52 sec (0) --- Single Parameter Plot end - Thu Jul 22 14:03:52 PDT 2010 WallClockElapseTime= 65 sec (0) --- Single Parameter Plot end - Thu Jul 22 14:04:05 PDT 2010 WallClockElapseTime= 78 sec (0) --- Single Parameter Plot end - Thu Jul 22 14:04:18 PDT 2010 WallClockElapseTime= 91 sec (0) --- Single Parameter Plot end - Thu Jul 22 14:04:29 PDT 2010 WallClockElapseTime= 102 sec (0) --- Single Parameter Plot end - Thu Jul 22 14:04:44 PDT 2010 WallClockElapseTime= 117 sec (0) --- Single Parameter Plot end - Thu Jul 22 14:04:56 PDT 2010 WallClockElapseTime= 129 sec (0) --- Single Parameter Plot end - Thu Jul 22 14:05:08 PDT 2010 WallClockElapseTime= 141 sec (0) --- Single Parameter Plot end - Thu Jul 22 14:05:20 PDT 2010 WallClockElapseTime= 153 sec (0) --- Single Parameter Plot end - Thu Jul 22 14:05:35 PDT 2010 WallClockElapseTime= 168 sec (0) --- Single Parameter Plot end - Thu Jul 22 14:05:51 PDT 2010 WallClockElapseTime= 184 sec Might this have to do with the background image question of my prior post? TJ _______________________________________________ ncl-talk mailing list List instructions, subscriber options, unsubscribe: http://mailman.ucar.edu/mailman/listinfo/ncl-talk_______________________________________________ ncl-talk mailing list List instructions, subscriber options, unsubscribe: http://mailman.ucar.edu/mailman/listinfo/ncl-talk
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