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<?php $array = array( 'foo' => 'bar', ); $timestamp = microtime(true); for ($i=1;$i<10000;$i++) { if (array_keys($array)) {} } $timestamp1 = microtime(true)-$timestamp; var_dump($timestamp1); for ($i=1;$i<10000;$i++) { if (!empty($array)) {} } $timestamp2 = microtime(true)-$timestamp; var_dump($timestamp2-$timestamp1); for ($i=1;$i<10000;$i++) { if ($array) {} } $timestamp3 = microtime(true)-$timestamp; var_dump($timestamp3-$timestamp2);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 42) Position 1 = 12
Branch analysis from position: 12
2 jumps found. (Code = 44) Position 1 = 14, Position 2 = 7
Branch analysis from position: 14
1 jumps found. (Code = 42) Position 1 = 28
Branch analysis from position: 28
2 jumps found. (Code = 44) Position 1 = 30, Position 2 = 24
Branch analysis from position: 30
1 jumps found. (Code = 42) Position 1 = 43
Branch analysis from position: 43
2 jumps found. (Code = 44) Position 1 = 45, Position 2 = 41
Branch analysis from position: 45
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 41
2 jumps found. (Code = 43) Position 1 = 42, Position 2 = 42
Branch analysis from position: 42
2 jumps found. (Code = 44) Position 1 = 45, Position 2 = 41
Branch analysis from position: 45
Branch analysis from position: 41
Branch analysis from position: 42
Branch analysis from position: 24
2 jumps found. (Code = 43) Position 1 = 27, Position 2 = 27
Branch analysis from position: 27
2 jumps found. (Code = 44) Position 1 = 30, Position 2 = 24
Branch analysis from position: 30
Branch analysis from position: 24
Branch analysis from position: 27
Branch analysis from position: 7
2 jumps found. (Code = 43) Position 1 = 11, Position 2 = 11
Branch analysis from position: 11
2 jumps found. (Code = 44) Position 1 = 14, Position 2 = 7
Branch analysis from position: 14
Branch analysis from position: 7
Branch analysis from position: 11
filename:       /in/KiXTo
function name:  (null)
number of ops:  55
compiled vars:  !0 = $array, !1 = $timestamp, !2 = $i, !3 = $timestamp1, !4 = $timestamp2, !5 = $timestamp3
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, <array>
    6     1        INIT_FCALL                                               'microtime'
          2        SEND_VAL                                                 <true>
          3        DO_ICALL                                         $7      
          4        ASSIGN                                                   !1, $7
    8     5        ASSIGN                                                   !2, 1
          6      > JMP                                                      ->12
    9     7    >   INIT_FCALL                                               'array_keys'
          8        SEND_VAR                                                 !0
          9        DO_ICALL                                         $10     
         10      > JMPZ                                                     $10, ->11
    8    11    >   PRE_INC                                                  !2
         12    >   IS_SMALLER                                               !2, 10000
         13      > JMPNZ                                                    ~12, ->7
   12    14    >   INIT_FCALL                                               'microtime'
         15        SEND_VAL                                                 <true>
         16        DO_ICALL                                         $13     
         17        SUB                                              ~14     $13, !1
         18        ASSIGN                                                   !3, ~14
   13    19        INIT_FCALL                                               'var_dump'
         20        SEND_VAR                                                 !3
         21        DO_ICALL                                                 
   16    22        ASSIGN                                                   !2, 1
         23      > JMP                                                      ->28
   17    24    >   ISSET_ISEMPTY_CV                                 ~18     !0
         25        BOOL_NOT                                         ~19     ~18
         26      > JMPZ                                                     ~19, ->27
   16    27    >   PRE_INC                                                  !2
         28    >   IS_SMALLER                                               !2, 10000
         29      > JMPNZ                                                    ~21, ->24
   20    30    >   INIT_FCALL                                               'microtime'
         31        SEND_VAL                                                 <true>
         32        DO_ICALL                                         $22     
         33        SUB                                              ~23     $22, !1
         34        ASSIGN                                                   !4, ~23
   21    35        INIT_FCALL                                               'var_dump'
         36        SUB                                              ~25     !4, !3
         37        SEND_VAL                                                 ~25
         38        DO_ICALL                                                 
   24    39        ASSIGN                                                   !2, 1
         40      > JMP                                                      ->43
   25    41    > > JMPZ                                                     !0, ->42
   24    42    >   PRE_INC                                                  !2
         43    >   IS_SMALLER                                               !2, 10000
         44      > JMPNZ                                                    ~29, ->41
   28    45    >   INIT_FCALL                                               'microtime'
         46        SEND_VAL                                                 <true>
         47        DO_ICALL                                         $30     
         48        SUB                                              ~31     $30, !1
         49        ASSIGN                                                   !5, ~31
   29    50        INIT_FCALL                                               'var_dump'
         51        SUB                                              ~33     !5, !4
         52        SEND_VAL                                                 ~33
         53        DO_ICALL                                                 
         54      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
149.08 ms | 1400 KiB | 19 Q