Xcode： Product - Scheme - Edit Scheme - Arguments

key：DYLD_PRINT_STATISTICS_DETAILS value：1

image.png

效果：

  total time: 1.5 seconds (100.0%)
  total images loaded:  476 (470 from dyld shared cache)
  total segments mapped: 22, into 416 pages
  total images loading time: 1.0 seconds (68.3%)
  total load time in ObjC: 122.99 milliseconds (8.0%)
  total debugger pause time: 888.87 milliseconds (58.0%)
  total dtrace DOF registration time:   0.00 milliseconds (0.0%)
  total rebase fixups:  37,175
  total rebase fixups time:   5.93 milliseconds (0.3%)
  total binding fixups: 3,434
  total binding fixups time: 258.97 milliseconds (16.9%)
  total weak binding fixups time:   7.21 milliseconds (0.4%)
  total redo shared cached bindings time:  10.54 milliseconds (0.6%)
  total bindings lazily fixed up: 0 of 0