Does Exporting 60fps on a 30fps timeline slows down export

I am editing a wedding videos with 2-3 cameras. The main videographer likes to shoot on 60fps while the other 2 shoots on 30fps.
I bring it to a 30fps timeline and set the 60fps clips to "scale to frame size"
after the edit, I export it out to 1080, 30 fps. And it takes about 9 hours to export a 40 mins video.
So I'm just curious if my 60fps clip on a 30fps timeline with 2 other 30fps angles is actually slowing down my export? What's the proper way that I should do it?
I just upgraded to a sad from a hdd and I thought it would actually make things faster but it seems like there is no changes.
I also have a 8gb ram. Does the problem lies on my timeline or my mac?

rehtseyat wrote:
I am editing a wedding videos with 2-3 cameras. The main videographer likes to shoot on 60fps while the other 2 shoots on 30fps.
I bring it to a 30fps timeline and set the 60fps clips to "scale to frame size"
after the edit, I export it out to 1080, 30 fps. And it takes about 9 hours to export a 40 mins video.
I have edited several 3 camera AVCHD weddings on this about significantly upgraded 1 year old PC notebook and while i really do the exporting on a desktop, but if you tell me your real export settings I will try to tell you what I see, now I do not have the complication of any 60p camera footage.
I cannot understand what you are doing with the "scale to frame size" process if both cameras are all the cameras are the same resolution???

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