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<?php $original = []; foreach (range(1, 20_000) as $iteration) { $original[] = [ 'id' => str_repeat("{$iteration}.", 4), 'name' => 'name', ]; } var_dump( array_column( $original, 'name', 'id' ) );
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 6, Position 2 = 18
Branch analysis from position: 6
2 jumps found. (Code = 78) Position 1 = 7, Position 2 = 18
Branch analysis from position: 7
1 jumps found. (Code = 42) Position 1 = 6
Branch analysis from position: 6
Branch analysis from position: 18
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 18
filename:       /in/T03XF
function name:  (null)
number of ops:  28
compiled vars:  !0 = $original, !1 = $iteration
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
    4     1        INIT_FCALL                                               'range'
          2        SEND_VAL                                                 1
          3        SEND_VAL                                                 20000
          4        DO_ICALL                                         $3      
          5      > FE_RESET_R                                       $4      $3, ->18
          6    > > FE_FETCH_R                                               $4, !1, ->18
    6     7    >   INIT_FCALL                                               'str_repeat'
          8        NOP                                                      
          9        FAST_CONCAT                                      ~6      !1, '.'
         10        SEND_VAL                                                 ~6
         11        SEND_VAL                                                 4
         12        DO_ICALL                                         $7      
         13        INIT_ARRAY                                       ~8      $7, 'id'
    7    14        ADD_ARRAY_ELEMENT                                ~8      'name', 'name'
    5    15        ASSIGN_DIM                                               !0
    7    16        OP_DATA                                                  ~8
    4    17      > JMP                                                      ->6
         18    >   FE_FREE                                                  $4
   11    19        INIT_FCALL                                               'var_dump'
   12    20        INIT_FCALL                                               'array_column'
   13    21        SEND_VAR                                                 !0
   14    22        SEND_VAL                                                 'name'
   15    23        SEND_VAL                                                 'id'
         24        DO_ICALL                                         $9      
         25        SEND_VAR                                                 $9
         26        DO_ICALL                                                 
   17    27      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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143.95 ms | 1406 KiB | 21 Q