RFC: parallel thingies

test runs:
normal run:
[01:09:48] [DEBUG] LaunchFrame.gatherAssets:994: Running with 8 threads
[01:09:48] [DEBUG] LaunchFrame.gatherAssets:1017: parallel result size: 0
[01:09:48] [DEBUG] LaunchFrame.gatherAssets:1018: time for mc asset check (parallel): 398
[01:09:50] [DEBUG] LaunchFrame.gatherAssets:1034: list size diff: 0
[01:09:50] [DEBUG] LaunchFrame.gatherAssets:1035: time for mc asset check (for loop): 1316

deleted assets/object/a*:
[01:10:56] [DEBUG] LaunchFrame.gatherAssets:994: Running with 8 threads
[01:10:56] [DEBUG] LaunchFrame.gatherAssets:1017: parallel result size: 88
[01:10:56] [DEBUG] LaunchFrame.gatherAssets:1018: time for mc asset check (parallel): 374
[01:10:58] [DEBUG] LaunchFrame.gatherAssets:1034: list size diff: 88
[01:10:58] [DEBUG] LaunchFrame.gatherAssets:1035: time for mc asset check (for loop): 1256

comments?