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I am using XCode 11.3.1 and and iMac, 2017, 3.4GHz, Quad core i5 with 16GB of memory, Catalina 10.15.2. XCode seems very slow at times (e.g., startup, build times, preview times, simulator launch). It is particularly a problem for preview. Preview operations seem to take minutes at times. Using the activity monitor, I note that CPU utilization is low (well below that of a single core), memory pressure is low, and there appears to be minimal disk activity. The only culprit I can think of is network access. Network access may come into play because my project is located in Documents and Documents is on my iCloud Drive. Network access may also be an issue if XCode is extremely chatty for reasons of which I am unaware. My network latency is estimated to be 50ms. Even so, if I move everything off iCloud, there is no noticable change in performance. I have also encountered file not found errors on added files that were located on iCloud drive and not copied where the files had not be downloaded yet.What should I be expecting?
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