iOS-启动流程

Edit Scheme->Run->Arguments->Environment Variables->DYLD_PRINT_STATISTICS:1

Total pre-main time: 654.59 milliseconds (100.0%)
         dylib loading time: 119.99 milliseconds (18.3%)
        rebase/binding time: 380.23 milliseconds (58.0%)
            ObjC setup time:  68.40 milliseconds (10.4%)
           initializer time:  85.82 milliseconds (13.1%)
           slowest intializers :
             libSystem.B.dylib :   3.07 milliseconds (0.4%)
    libMainThreadChecker.dylib :  14.79 milliseconds (2.2%)
                  LoveOfPomelo : 120.48 milliseconds (18.4%)

Edit Scheme->Run->Arguments->Environment Variables->DYLD_PRINT_STATISTICS_DETAILS:1

  total time: 924.43 milliseconds (100.0%)
  total images loaded:  305 (0 from dyld shared cache)
  total segments mapped: 908, into 125240 pages with 9067 pages pre-fetched
  total images loading time: 650.11 milliseconds (70.3%)
  total load time in ObjC:  75.70 milliseconds (8.1%)
  total debugger pause time: 462.64 milliseconds (50.0%)
  total dtrace DOF registration time:   0.14 milliseconds (0.0%)
  total rebase fixups:  3,212,220
  total rebase fixups time:  43.73 milliseconds (4.7%)
  total binding fixups: 366,847
  total binding fixups time:  47.16 milliseconds (5.1%)
  total weak binding fixups time:   1.59 milliseconds (0.1%)
  total redo shared cached bindings time:  47.97 milliseconds (5.1%)
  total bindings lazily fixed up: 0 of 0
  total time in initializers and ObjC +load: 105.96 milliseconds (11.4%)
                         libSystem.B.dylib :  42.99 milliseconds (4.6%)
               libBacktraceRecording.dylib :   3.14 milliseconds (0.3%)
                            CoreFoundation :   1.51 milliseconds (0.1%)
                                Foundation :   1.83 milliseconds (0.1%)
                libMainThreadChecker.dylib :  15.29 milliseconds (1.6%)
                              LoveOfPomelo :  78.05 milliseconds (8.4%)
total symbol trie searches:    177022
total symbol table binary searches:    0
total images defining weak symbols:  31
total images using weak symbols:  82

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转载自blog.csdn.net/liqun3yue25/article/details/88225091