php中serialize、unserialize与json_encode、json_decode比较

性能比较

同一个变量编码或解码10000次，每个函数执行10000次所需时间

php5.2.13

json : 190 
serialize : 257 
json_encode : 0.08364200592041 
json_decode : 0.18004894256592 
serialize : 0.063642024993896 
unserialize : 0.086990833282471 
DONE.

时间

json_decode两倍于unserialize

php5.3.2

json : 190 
serialize : 257 
json_encode : 0.062805891036987 
json_decode : 0.14239192008972 
serialize : 0.048481941223145 
unserialize : 0.05927300453186 
DONE.

json_decode两倍于unserialize

总之 unserialize 解码速度要更快，在做缓存,编码频繁解码的情况下使用会有更好的效率。

测试代码如下

<?php

$target = array (

    'name' => '全能头盔',

    'quality' => 'Blue',

    'ti_id' => 21302,

    'is_bind' => 1,

    'demand_conditions' => array (

        'HeroLevel' => 1,

    ),

    'quality_attr_sign' => array (

        'HeroStrength' => 8,

        'HeroAgility' => 8,

        'HeroIntelligence' => 8,

    ),

);

$json = json_encode($target); //json_encode编码

$seri = serialize($target); //serialize序列化

echo "json :\t\t" . strlen($json) . "\r\n"; //json_encode后字符串长度

echo "serialize :\t" . strlen($seri) . "\r\n\r\n"; //serialize序列化长度

//---------------------------------- json_encode

$stime = microtime(true); //起始微秒

for ($i = 0; $i < 10000; $i ++){ //10000次

    json_encode($target);

}

$etime = microtime(true); //终止微秒

echo "json_encode :\t" . ($etime - $stime) . "\r\n"; //运行时间

//---------------------------------- json_decode

$stime = microtime(true);

for ($i = 0; $i < 10000; $i ++){

    json_decode($json);

}

$etime = microtime(true);

echo "json_decode :\t" . ($etime - $stime) . "\r\n\r\n";

//---------------------------------- serialize

$stime = microtime(true);

for ($i = 0; $i < 10000; $i ++){

    serialize($target);

}

$etime = microtime(true);

echo "serialize :\t" . ($etime - $stime) . "\r\n";

//---------------------------------- unserialize

$stime = microtime(true);

for ($i = 0; $i < 10000; $i ++){

    unserialize($seri);

}

$etime = microtime(true);

echo "unserialize :\t" . ($etime - $stime) . "\r\n\r\n";

echo 'DONE.';

?> 

json : 190

serialize : 257

json_encode : 0.052663087844849

json_decode : 0.068554162979126

serialize : 0.023483037948608

unserialize : 0.031199216842651

DONE.