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<?php $array = new SplFixedArray(1024 * 1024); // array(); for ($i = 0; $i < 1024 * 1024; ++$i) $array[$i] = 0; echo memory_get_peak_usage();
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 42) Position 1 = 9
Branch analysis from position: 9
2 jumps found. (Code = 44) Position 1 = 11, Position 2 = 6
Branch analysis from position: 11
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 6
2 jumps found. (Code = 44) Position 1 = 11, Position 2 = 6
Branch analysis from position: 11
Branch analysis from position: 6
filename:       /in/2huCn
function name:  (null)
number of ops:  15
compiled vars:  !0 = $array, !1 = $i
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   NEW                                              $2      'SplFixedArray'
          1        SEND_VAL_EX                                              1048576
          2        DO_FCALL                                      0          
          3        ASSIGN                                                   !0, $2
    4     4        ASSIGN                                                   !1, 0
          5      > JMP                                                      ->9
    5     6    >   ASSIGN_DIM                                               !0, !1
          7        OP_DATA                                                  0
    4     8        PRE_INC                                                  !1
          9    >   IS_SMALLER                                               !1, 1048576
         10      > JMPNZ                                                    ~8, ->6
    7    11    >   INIT_FCALL                                               'memory_get_peak_usage'
         12        DO_ICALL                                         $9      
         13        ECHO                                                     $9
         14      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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173.18 ms | 1394 KiB | 15 Q