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<?php $max = 100; $arr = array_fill(0, $max, 1); $mem = memory_get_usage(true); foreach ($arr as $key=>&$val) { $arr[$max+1] = 9999; } echo memory_get_usage(true) - $mem;
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 125) Position 1 = 12, Position 2 = 18
Branch analysis from position: 12
2 jumps found. (Code = 126) Position 1 = 13, Position 2 = 18
Branch analysis from position: 13
1 jumps found. (Code = 42) Position 1 = 12
Branch analysis from position: 12
Branch analysis from position: 18
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 18
filename:       /in/D7sZ3
function name:  (null)
number of ops:  25
compiled vars:  !0 = $max, !1 = $arr, !2 = $mem, !3 = $val, !4 = $key
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 100
    4     1        INIT_FCALL                                               'array_fill'
          2        SEND_VAL                                                 0
          3        SEND_VAR                                                 !0
          4        SEND_VAL                                                 1
          5        DO_ICALL                                         $6      
          6        ASSIGN                                                   !1, $6
    5     7        INIT_FCALL                                               'memory_get_usage'
          8        SEND_VAL                                                 <true>
          9        DO_ICALL                                         $8      
         10        ASSIGN                                                   !2, $8
    6    11      > FE_RESET_RW                                      $10     !1, ->18
         12    > > FE_FETCH_RW                                      ~11     $10, !3, ->18
         13    >   ASSIGN                                                   !4, ~11
    8    14        ADD                                              ~13     !0, 1
         15        ASSIGN_DIM                                               !1, ~13
         16        OP_DATA                                                  9999
    6    17      > JMP                                                      ->12
         18    >   FE_FREE                                                  $10
   11    19        INIT_FCALL                                               'memory_get_usage'
         20        SEND_VAL                                                 <true>
         21        DO_ICALL                                         $15     
         22        SUB                                              ~16     $15, !2
         23        ECHO                                                     ~16
         24      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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152.86 ms | 1395 KiB | 17 Q