V6 has a bit of a problem with copius text



Actually a bit more than a bit… :grimacing:

I had noticed a slowdown in the display in V6 when there were large amounts of text objects - such as a large land-planning document with many thousands of notations, so I decided to do some testing on my own. And unfortunately, it turned out to be worse than I thought. To be honest, there are also some problems in V5, but they are different.

First, I used the following quickie script to generate 64,000 number texts in a 3D cube:

import rhinoscriptsyntax as rs
import Rhino

for x in range(40):
    for y in range(40):
        for z in range(40):

I then saved the result out as both V5 and V6 files.

First astonishment - the V5 file size is 25Mb, the V6 size is 114Mb…! I expect this is due to the rich text format info on each text object - I can’t imagine where else this difference might come from.

Second, V5 opens the file in about 15 seconds, V6 takes… minutes.

Next, what I really wanted to test with all this:

In V5 I can zoom and pan slowly, but I can still move around in the cube. It does have a bit of a display frustum problem when I try to ZoomAllExtents though.

In V6, the ZoomAllExtents looks better. BUT Trying to pan, zoom, or simply switch viewports is way slower. Very sticky.

I am attaching the zipped V5 format file below for reference, but it’s probably easier and faster to just generate the text with the script inside Rhino - takes just a few seconds. However, it is instructive to actually try to open the V5 file in V6. This seems to react much worse then simply generating the texts in a new file in V6, here it takes many minutes to open as I said, and once the file is open, the display performance is worse than with the generated text (here at least). Not sure why there should be a difference.

Anyway, another one for the “things to check” pile… Just in case, I’m testing with a 980Ti and pretty recent drivers.

64KTextV5.zip (3.0 MB)


Is it Rhino 6 is more slow than rhino 5