Re: Version 6 graphics can be painfully slow
- To: mathgroup at smc.vnet.net
- Subject: [mg84871] Re: Version 6 graphics can be painfully slow
- From: ragfield <ragfield at gmail.com>
- Date: Wed, 16 Jan 2008 23:12:57 -0500 (EST)
- References: <fmkerk$72g$1@smc.vnet.net>
On Jan 16, 3:22=A0am, Szabolcs Horv=E1t <szhor... at gmail.com> wrote:
> In some cases, version 6 graphics can be painfully slow. =A0Consider this
> example:
>
> data = Table[{Random[], Random[]}, {100000}];
> Graphics[{PointSize[0.002], Point /@ data}, AspectRatio -> Automatic] //
> Show
>
> This used to work fine in version 5.2, but it takes forever to complete
> in version 6.0.1. =A0I have a dataset with about 250 000 points that I
> would like to plot, so this problem is really annoying ...
>
> The strange thing is that as soon as the graphic appears, resizing is
> fast and works fine (especially with antialiasing disabled). =A0So it is
> not the /drawing/ itself that takes so long.
>
> I really hope that these problems will be fixed in 6.1, but until then,
> does anyone have a suggestion for speeding this up?
Your example runs in 73 seconds on my 4 year old desktop. If you wrap
Point[] around the entire array (rather than mapping it across the
array) it returns instantaneously.
Graphics[{PointSize[0.002], Point[data]}, AspectRatio -> Automatic]
See tutorial/EfficientRepresentationOfManyPrimitives in the
Mathematica 6 documentation.
-Rob