Expected relation between text size and time to run animation?

[adavies42]

I've been testing the "waves" effect, and noticed it seems to slow down significantly as the text gets bigger. On a 26x67 text similar to the one you use in the showroom, time tte waves takes 12 seconds; when I copy its contents to make a 52x139 text, it takes 46.5 seconds, or about 4x longer. 26x139 and 52x67 versions both took the original 12 seconds though.

Is this expected?