Try it and see for yourself.
Hey, thanks Todd (fyi, that last reply was from Glixity not me). I tried it by creating a couple of comps:
1. 3000x3000 with shape layer containing 20 point path with bezier curves doing a path animation
2. 300x300 with the same shape layer doing a slightly different animation
Individually, these took very different amounts of time to render. The larger took about ten or more times as long to render. I then put both of these in a standard 1920x1080 comp scaled at 36% and 360% respectively, and when within that secondary comp, they required the same amount of render time. Thanks for the suggestion - that definitely answered my main question. I was wondering if there are any notable times when this changes. I.e. Is this true of shape layers but not true of certain asset types or anything like that? Or are there certain animations that don't speed up when composited within another composition? Thanks again.
> within that secondary comp, they required the same amount of render time
Be careful when doing tests like this. The second (and third and fourth...) times that you use and render the same element, the result will be pulled from the cache, so you can't use these subsequent runs for measuring render times unless you purge the cache at each step.
Cool, thanks for the tip. I just ran the tests again purging with each step and got the same results. Do these results not make sense based on your experience, or is this just a general tip for when doing future tests?
just a general tip