Hi there!
You can try experiment this:
- Setup that font on the plugin parameters.
- Then playtest the game and wait for it to launch. After that, close the playtest.
- Open the plugin parameters, and set this parameter to false: "Build Bitmap File".
What may be causing the load issue is, when this parameter is ON/TRUE, it will scan all the bitmap file to create the property for each character. Like measure their width and height. This is a heavy process and only intended to do it once, per bitmap file, to finish the setup of the bitmap font.
However, any new bitmap font you add or change the plugin parameters, you will need to set it to true again.
Also, this parameter only affects playtest. Meaning, after you deploy the game, it will always be set to false, so you don't need to worry about the players with this heavy stuff.
If that still not work, i recommend you to not scale your bitmap font. Do it em 1x and I will add a resize parameter inside the plugin to handle the font scale :)