V8 file save as V5 then V5 is 19 secs save when 1 sec V8

Hi,
gave up in V8, save as V5, open the v5 then click save and wait 19 secs.
open the V8 file and 1 sec save.
why ?
Its a mesh and just a few dims and curves.
Unable to use V8 with vanishing control points. so use V5.
but its horrendously slow.

Steve

What is your OS? note that Rhino 5 is not supported in Windows 11 anymore (Rhino 5 was last updated in 2017). We can speculate a bit on the cause if you post the file. Thanks!!

Hi,
OS is win 10 64 bit pro,
Wild horses would not drag me to win 11.

file has a mesh in it, so how do I get this to you ?
do I also send the obj or as its imported is it within the file now ?

Steve

You can zip and provide step by step instructions to repeat here.

https://www.rhino3d.com/upload

We’ll take a look but being a Rhino 5 issue we can only try to improve your workflow.