[Backstabnoob]

If you have 19 models on the server they are all precached to the memory on load, that's 1.3*19 which is as you said 24.7MB, but if you have only one 9MB model then only 9MB is precached to the memory so you actually save 15.7MB of memory.

The model is precached only once, so it's 1x9MB vs 19x1.3MB.

Not that it matters in this day and age though, I wouldn't concern myself too much about it.