Speed issues, please help !

I have 144 curve elements each of them containing 16 points.  From 2 points of the 16, I made „editable” in way. It means  2 points of each element is written to excel chart. I „edit” their location with a number slider. When the pont new location is OK for me (changing the slider)  I update my excel file, changing only one point at a time. My problem is that when I change on point in excel, the whole update process meaning, when I see the change of one point in he geometry in Rhino window takes  more than one minute.

During this time Rhino and grasshopper are freezing. Since usually I have edit several point in a geometry, which means it can take me hours to finish the job, which is absolutely unbearable.

My first question that this more than minute update time with such amount of data is supposed to be normal, or I do something wrong?

Is there a way to speed a job, maybe there is a workaround for this problem?

Thanks for any help in advance!