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<?php define('KINT_MB', function_exists('mb_substr')); $time = microtime(true) * 1000; for ($i = 0; $i < 1000; $i++) { if (function_exists('mb_substr')) { } } $time1 = microtime(true) * 1000; for ($i = 0; $i < 1000; $i++) { if (KINT_MB) { } } $time2 = microtime(true) * 1000; var_dump(round($time1 - $time)); var_dump(round($time2 - $time1));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 42) Position 1 = 19
Branch analysis from position: 19
2 jumps found. (Code = 44) Position 1 = 21, Position 2 = 14
Branch analysis from position: 21
1 jumps found. (Code = 42) Position 1 = 31
Branch analysis from position: 31
2 jumps found. (Code = 44) Position 1 = 33, Position 2 = 28
Branch analysis from position: 33
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 28
2 jumps found. (Code = 43) Position 1 = 30, Position 2 = 30
Branch analysis from position: 30
2 jumps found. (Code = 44) Position 1 = 33, Position 2 = 28
Branch analysis from position: 33
Branch analysis from position: 28
Branch analysis from position: 30
Branch analysis from position: 14
2 jumps found. (Code = 43) Position 1 = 18, Position 2 = 18
Branch analysis from position: 18
2 jumps found. (Code = 44) Position 1 = 21, Position 2 = 14
Branch analysis from position: 21
Branch analysis from position: 14
Branch analysis from position: 18
filename:       /in/hD9Ru
function name:  (null)
number of ops:  53
compiled vars:  !0 = $time, !1 = $i, !2 = $time1, !3 = $time2
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                               'define'
          1        SEND_VAL                                                 'KINT_MB'
          2        INIT_FCALL                                               'function_exists'
          3        SEND_VAL                                                 'mb_substr'
          4        DO_ICALL                                         $4      
          5        SEND_VAR                                                 $4
          6        DO_ICALL                                                 
    5     7        INIT_FCALL                                               'microtime'
          8        SEND_VAL                                                 <true>
          9        DO_ICALL                                         $6      
         10        MUL                                              ~7      $6, 1000
         11        ASSIGN                                                   !0, ~7
    6    12        ASSIGN                                                   !1, 0
         13      > JMP                                                      ->19
    7    14    >   INIT_FCALL                                               'function_exists'
         15        SEND_VAL                                                 'mb_substr'
         16        DO_ICALL                                         $10     
         17      > JMPZ                                                     $10, ->18
    6    18    >   PRE_INC                                                  !1
         19    >   IS_SMALLER                                               !1, 1000
         20      > JMPNZ                                                    ~12, ->14
   11    21    >   INIT_FCALL                                               'microtime'
         22        SEND_VAL                                                 <true>
         23        DO_ICALL                                         $13     
         24        MUL                                              ~14     $13, 1000
         25        ASSIGN                                                   !2, ~14
   12    26        ASSIGN                                                   !1, 0
         27      > JMP                                                      ->31
   13    28    >   FETCH_CONSTANT                                   ~17     'KINT_MB'
         29      > JMPZ                                                     ~17, ->30
   12    30    >   PRE_INC                                                  !1
         31    >   IS_SMALLER                                               !1, 1000
         32      > JMPNZ                                                    ~19, ->28
   17    33    >   INIT_FCALL                                               'microtime'
         34        SEND_VAL                                                 <true>
         35        DO_ICALL                                         $20     
         36        MUL                                              ~21     $20, 1000
         37        ASSIGN                                                   !3, ~21
   19    38        INIT_FCALL                                               'var_dump'
         39        INIT_FCALL                                               'round'
         40        SUB                                              ~23     !2, !0
         41        SEND_VAL                                                 ~23
         42        DO_ICALL                                         $24     
         43        SEND_VAR                                                 $24
         44        DO_ICALL                                                 
   20    45        INIT_FCALL                                               'var_dump'
         46        INIT_FCALL                                               'round'
         47        SUB                                              ~26     !3, !2
         48        SEND_VAL                                                 ~26
         49        DO_ICALL                                         $27     
         50        SEND_VAR                                                 $27
         51        DO_ICALL                                                 
         52      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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150.42 ms | 1400 KiB | 23 Q