“The brief was simple, push the new Mac Pro and FCPX to the limit. Never mind 4k or 8K, we went large on everything until things broke. Alex Gollner and Peter Wiggins perform the ultimate stress test,” fcp.co reports. “A few notes before we start. The footage that we used was the ProRes demo material from the new Blackmagic 4K Cinema Camera. We also left FCPX set to Better Quality. (Actually we forgot abut the setting until about halfway through the tests!) All Libraries were local and the big media was stored locally as well to benefit from the fast SSD storage.”

“Here’s our trusty Mac Pro configuration: 3 GHz 8-core Xeon, 64 GB 1867 MHz DDR3 ECC RAM, AMD FirePro D700 6144 MB, OS X 10.9,” fcp.co reports. “So first question: What is the largest number of connected clips you can have stacked up in FCPX?”

“We would like to say that this is a comparison to FCP7, where the maximum amount of video tracks was 99, but as FCPX doesn’t have tracks, we chose to occupy the ‘lanes’ with connected clips. Alex started to add 4K connected clips one on top of each other at 1 frame intervals. He got up to 100 quite quickly,” fcp.co reports. “The Mac Pro handled this with ease, then we went to 200 connected clips, again no problem. Feeling confident, we decided to cut and paste. Pasting 200 connected clips to make a total of 400 took a second, pasting those 400 again took two and a half and pasting 800 took four seconds with the dreaded beach ball appearing momentarily. We did turn the Timeline Index off as we noticed a considerable lag when things got large with it enabled. Time to go bigger. We stopped at 1600 connected clips, but proved that FCPX doesn’t really have a lane limit. Your main problem here will be seeing all the clips in the GUI.”

fcp.co reports, “Then we had to see if it would play. To give the Mac Pro a chance, we reduced the number of clips in lanes down to 1000.”

 
Much more in the full article, including a 500,000 pixel wide by 1080 pixels high project, here.