Re: png output -- very long processing time?

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
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Received on Thu Jul 22 15:50:51 2010