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run code in 500+ PHP versions simultaneously
<?php $prefixes = array( 'aaa' => true, 'bbb' => true, 'ccc' => true, 'ddd' => true, ); $array = array(); for ($i = 0; $i < 50; $i++) { $values = array(); for ($j = 0; $j < 5000; $j++) { $values[array_rand($prefixes).$j] = mt_rand(0, 1000); } $array[$i] = $values; } $t = microtime(1); $result1 = array(); foreach ($array as $v) { $result1 = array_merge($result1, $v); } echo 'multiple: '.(microtime(1) - $t)."\n"; $t = microtime(1); $result2 = call_user_func_array('array_merge', $array); echo 'single: '.(microtime(1) - $t)."\n";
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 42) Position 1 = 23
Branch analysis from position: 23
2 jumps found. (Code = 44) Position 1 = 25, Position 2 = 4
Branch analysis from position: 25
2 jumps found. (Code = 77) Position 1 = 31, Position 2 = 38
Branch analysis from position: 31
2 jumps found. (Code = 78) Position 1 = 32, Position 2 = 38
Branch analysis from position: 32
1 jumps found. (Code = 42) Position 1 = 31
Branch analysis from position: 31
Branch analysis from position: 38
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 38
Branch analysis from position: 4
1 jumps found. (Code = 42) Position 1 = 18
Branch analysis from position: 18
2 jumps found. (Code = 44) Position 1 = 20, Position 2 = 7
Branch analysis from position: 20
2 jumps found. (Code = 44) Position 1 = 25, Position 2 = 4
Branch analysis from position: 25
Branch analysis from position: 4
Branch analysis from position: 7
2 jumps found. (Code = 44) Position 1 = 20, Position 2 = 7
Branch analysis from position: 20
Branch analysis from position: 7
filename:       /in/kJmVl
function name:  (null)
number of ops:  63
compiled vars:  !0 = $prefixes, !1 = $array, !2 = $i, !3 = $values, !4 = $j, !5 = $t, !6 = $result1, !7 = $v, !8 = $result2
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                       !0, <array>
   10     1        ASSIGN                                                       !1, <array>
   12     2        ASSIGN                                                       !2, 0
          3      > JMP                                                          ->23
   13     4    >   ASSIGN                                                       !3, <array>
   14     5        ASSIGN                                                       !4, 0
          6      > JMP                                                          ->18
   15     7    >   INIT_FCALL                                                   'array_rand'
          8        SEND_VAR                                                     !0
          9        DO_ICALL                                             $14     
         10        CONCAT                                               ~15     $14, !4
         11        INIT_FCALL                                                   'mt_rand'
         12        SEND_VAL                                                     0
         13        SEND_VAL                                                     1000
         14        DO_ICALL                                             $17     
         15        ASSIGN_DIM                                                   !3, ~15
         16        OP_DATA                                                      $17
   14    17        PRE_INC                                                      !4
         18    >   IS_SMALLER                                                   !4, 5000
         19      > JMPNZ                                                        ~19, ->7
   18    20    >   ASSIGN_DIM                                                   !1, !2
         21        OP_DATA                                                      !3
   12    22        PRE_INC                                                      !2
         23    >   IS_SMALLER                                                   !2, 50
         24      > JMPNZ                                                        ~22, ->4
   21    25    >   INIT_FCALL                                                   'microtime'
         26        SEND_VAL                                                     1
         27        DO_ICALL                                             $23     
         28        ASSIGN                                                       !5, $23
   23    29        ASSIGN                                                       !6, <array>
   24    30      > FE_RESET_R                                           $26     !1, ->38
         31    > > FE_FETCH_R                                                   $26, !7, ->38
   25    32    >   INIT_FCALL                                                   'array_merge'
         33        SEND_VAR                                                     !6
         34        SEND_VAR                                                     !7
         35        DO_ICALL                                             $27     
         36        ASSIGN                                                       !6, $27
   24    37      > JMP                                                          ->31
         38    >   FE_FREE                                                      $26
   28    39        INIT_FCALL                                                   'microtime'
         40        SEND_VAL                                                     1
         41        DO_ICALL                                             $29     
         42        SUB                                                  ~30     $29, !5
         43        CONCAT                                               ~31     'multiple%3A+', ~30
         44        CONCAT                                               ~32     ~31, '%0A'
         45        ECHO                                                         ~32
   29    46        INIT_FCALL                                                   'microtime'
         47        SEND_VAL                                                     1
         48        DO_ICALL                                             $33     
         49        ASSIGN                                                       !5, $33
   31    50        INIT_FCALL                                                   'array_merge'
         51        SEND_ARRAY                                                   !1
         52        CHECK_UNDEF_ARGS                                             
         53        DO_FCALL                                          1  $35     
         54        ASSIGN                                                       !8, $35
   33    55        INIT_FCALL                                                   'microtime'
         56        SEND_VAL                                                     1
         57        DO_ICALL                                             $37     
         58        SUB                                                  ~38     $37, !5
         59        CONCAT                                               ~39     'single%3A+', ~38
         60        CONCAT                                               ~40     ~39, '%0A'
         61        ECHO                                                         ~40
         62      > RETURN                                                       1

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