<?php
$j = 1;
var_dump(memory_get_usage());
$tipi = array_fill(0, 10000, 'php-internal');
var_dump(memory_get_usage());
//内存没有发生暴增, 没有复制, 只是引用
$tipi_copy = $tipi;
var_dump(memory_get_usage());
//内存没有发生暴增, 没有复制, 仍然只是引用
foreach($tipi_copy as $value){
$j += count($value);
}
var_dump(memory_get_usage());
//内存发生暴增, 发生复制, 不在引用
$tipi_copy[0] = "php-internals-tmp";
var_dump(memory_get_usage());
- Output for 7.1.0, 7.1.7
- int(348072)
int(876544)
int(876544)
int(876544)
int(1404984)
- Output for 7.1.5 - 7.1.6
- int(348616)
int(877088)
int(877088)
int(877088)
int(1405528)
- Output for 7.0.0 - 7.0.20
- int(348104)
int(876576)
int(876576)
int(876576)
int(1405016)
- Output for 5.6.0 - 5.6.28
- int(219064)
int(1230472)
int(1230560)
int(1230648)
int(2241928)
- Output for 5.5.0 - 5.5.36
- int(219064)
int(1230480)
int(1230568)
int(1230656)
int(2241936)
- Output for 5.4.10 - 5.4.45
- int(219584)
int(1231000)
int(1231088)
int(1231176)
int(2242456)
- Output for 5.4.0 - 5.4.9
- int(219056)
int(1230472)
int(1230560)
int(1230648)
int(2241928)
- Output for 5.3.11 - 5.3.29
- int(622872)
int(1634320)
int(1634424)
int(1634520)
int(2645840)
- Output for 5.3.0 - 5.3.10
- int(622568)
int(1634016)
int(1634120)
int(1634216)
int(2645536)
- Output for 5.2.10 - 5.2.17
- int(80504)
int(1091960)
int(1092064)
int(1092160)
int(2103480)
- Output for 5.2.7 - 5.2.9
- int(81232)
int(1093672)
int(1093872)
int(1223280)
int(2105208)
- Output for 5.2.4 - 5.2.6
- int(81552)
int(1094008)
int(1094208)
int(1223616)
int(2105544)
- Output for 5.2.3
- int(81552)
int(1094008)
int(1094208)
int(1094208)
int(2105568)
- Output for 5.2.2
- int(79448)
int(1091912)
int(1092112)
int(1092112)
int(2103472)
- Output for 5.2.1
- int(79448)
int(1091384)
int(1091584)
int(1091584)
int(2102944)
- Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0
- Fatal error: Call to undefined function memory_get_usage() in /in/F0fC4 on line 4
Process exited with code 255. - Output for 4.4.5 - 4.4.9
- Fatal error: Call to undefined function: memory_get_usage() in /in/F0fC4 on line 4
Process exited with code 255. - Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.4
- Fatal error: Call to undefined function: memory_get_usage() in /in/F0fC4 on line 4
Process exited with code 255. - Output for 4.3.0 - 4.3.1
- Fatal error: Call to undefined function: memory_get_usage() in /in/F0fC4 on line 4
preferences:
174.84 ms | 401 KiB | 207 Q