3v4l.org

run code in 300+ PHP versions simultaneously
<?php $start = microtime(true); for ($i = 1 ; $i <=1000 ; $i++) { isset($dupa); } var_dump(microtime(true) - $start);
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/m0qu4
function name:  (null)
number of ops:  19
compiled vars:  !0 = $start, !1 = $i, !2 = $dupa
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                               'microtime'
          1        SEND_VAL                                                 <true>
          2        DO_ICALL                                         $3      
          3        ASSIGN                                                   !0, $3
    5     4        ASSIGN                                                   !1, 1
          5      > JMP                                                      ->9
    6     6    >   ISSET_ISEMPTY_CV                                 ~6      !2
          7        FREE                                                     ~6
    5     8        PRE_INC                                                  !1
          9    >   IS_SMALLER_OR_EQUAL                                      !1, 1000
         10      > JMPNZ                                                    ~8, ->6
    8    11    >   INIT_FCALL                                               'var_dump'
         12        INIT_FCALL                                               'microtime'
         13        SEND_VAL                                                 <true>
         14        DO_ICALL                                         $9      
         15        SUB                                              ~10     $9, !0
         16        SEND_VAL                                                 ~10
         17        DO_ICALL                                                 
         18      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
157.59 ms | 1395 KiB | 17 Q