Some font made a computer slower

Some font made a computer very slower.
I cannot tell whether it is slow font. (There are OTF, TTF, preset font and Installed font. )

Are there are rule?

Gotham Rounded Book - slow
arno pro - slow
Helvatica -slow

Futurura - OK
arial - OK

Japanese font
Hiragino - slow
Kozuka - slow

MS gothic - OK
Yu gothic - OK

rhino uses fonts installed on your computer. If the font has a problem it’s at the windows level not rhino.

unless you are extruding the font and it’s made up of very complex curves, then the resulting geometry could be causing a slowdown.

can you post examples of what problems you are seeing?