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虽迟但到！PHP8测评来了~

6月25号php 8 alpha 1发布，7月9号 php 8 alpha 2发布，一般alpha 2是一个稍微能用的版本，所以周末测评了一下php8 JIT到底是个什么？

先看一下结果：

JIT不开启的情况下

php -d opcache.jit_buffer_size=0 Zend/bench.php
simple             0.025simplecall         0.012simpleucall        0.012simpleudcall       0.012mandel             0.135mandel2            0.211ackermann(7)       0.082ary(50000)         0.012ary2(50000)        0.010ary3(2000)         0.186fibo(30)           0.283hash1(50000)       0.039hash2(500)         0.041heapsort(20000)    0.089matrix(20)         0.110nestedloop(12)     0.096sieve(30)          0.045strcat(200000)     0.019------------------------
Total              1.419

JIT开启的情况下：

php -d -d opcache.jit_buffer_size=64M -d opcache.jit=1205 Zend/bench.php
simple             0.001simplecall         0.000simpleucall        0.000simpleudcall       0.000mandel             0.005mandel2            0.006ackermann(7)       0.010ary(50000)         0.005ary2(50000)        0.004ary3(2000)         0.011fibo(30)           0.027hash1(50000)       0.027hash2(500)         0.018heapsort(20000)    0.011matrix(20)         0.011nestedloop(12)     0.006sieve(30)          0.004strcat(200000)     0.009------------------------
Total              0.155

还有不打开Opcache的情况下：

php Zend/bench.php
simple             0.051simplecall         0.017simpleucall        0.083simpleudcall       0.089mandel             0.506mandel2            0.409ackermann(7)       0.095ary(50000)         0.012ary2(50000)        0.010ary3(2000)         0.187fibo(30)           0.367hash1(50000)       0.040hash2(500)         0.041heapsort(20000)    0.097matrix(20)         0.122nestedloop(12)     0.093sieve(30)          0.063strcat(200000)     0.018------------------------
Total              2.299

不开启Opcache : 2.299s 开启Opcache不开启JIT情况下：1.419s 开启Opcache且开启JIT情况下：0.155s

开启JIT情况下是不开启JIT情况下的接近9.15倍，多次测试这个值稳定在8倍到10倍之间。

MPF表现如何？

为了接近我们的业务，所以在mpf框架下进行测试

环境

aliyun centos 6.9

php7.test.com php-fpm一个进程 php8.test.com php-fpm一个进程

Mpf两个接口

/v1/hello/wzh/index1

public function index1() {    $this->output('123');
}

/v1/hello/wzh/index2

public function index2() {
    $a = 0;    for ($i = 0; $i < 1000000; $i++)
        $a++;    $this->output($a);
}

我们压测一下

php7 计算少情况

wrk -c36 -d 5s -t12 https://php7.test.com/v1/hello/wzh/index1
Running 5s test @ https://php7.test.com/v1/hello/wzh/index1
  12 threads and 36 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency   432.97ms   76.00ms 527.38ms   92.17%
    Req/Sec     8.38      5.36    20.00     63.85%
  396 requests in 5.09s, 121.43KB readRequests/sec:     77.78
Transfer/sec:     23.85KB

php7 计算多情况

wrk -c36 -d 5s -t12 https://php7.test.com/v1/hello/wzh/index2
Running 5s test @ https://php7.test.com/v1/hello/wzh/index2
  12 threads and 36 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency     1.02s   569.99ms   1.96s    57.14%
    Req/Sec     3.18      3.43    10.00     80.88%
  70 requests in 5.03s, 21.60KB read
  Socket errors: connect 0, read 0, write 0, timeout 42
Requests/sec:     13.91
Transfer/sec:      4.29KB

php8 JIT开启计算少情况

wrk -c36 -d 5s -t12 https://php8.test.com/v1/hello/wzh/index1
Running 5s test @ https://php8.test.com/v1/hello/wzh/index1
  12 threads and 36 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency    34.48ms    4.34ms  95.45ms   87.87%
    Req/Sec    84.61     13.36   121.00     85.28%
  5083 requests in 5.03s, 1.67MB readRequests/sec:   1010.55
Transfer/sec:    340.43KB

php8 JIT开启计算多情况

wrk -c36 -d 5s -t12 https://php8.test.com/v1/hello/wzh/index2
Running 5s test @ https://php8.test.com/v1/hello/wzh/index2
  12 threads and 36 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency    97.84ms    4.97ms 159.50ms   92.12%
    Req/Sec    30.27      4.42    50.00     86.50%
  1814 requests in 5.07s, 614.71KB readRequests/sec:    357.76
Transfer/sec:    121.23KB

php8 JIT关闭计算少情况

wrk -c36 -d 5s -t12 https://php8.test.com/v1/hello/wzh/index1
Running 5s test @ https://php8.test.com/v1/hello/wzh/index1
  12 threads and 36 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency    38.10ms    6.47ms 239.60ms   94.01%
    Req/Sec    77.50     12.76   110.00     89.63%
  4622 requests in 5.04s, 1.52MB readRequests/sec:    916.22
Transfer/sec:    308.65KB

php8 JIT关闭计算多情况

wrk -c36 -d 5s -t12 https://php8.test.com/v1/hello/wzh/index2
Running 5s test @ https://php8.test.com/v1/hello/wzh/index2
  12 threads and 36 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency   766.16ms  181.30ms 887.08ms   88.37%
    Req/Sec     6.25      5.36    20.00     91.36%
  215 requests in 5.09s, 72.86KB readRequests/sec:     42.22
Transfer/sec:     14.31KB

[image:BA1A37D8-760E-4637-901B-3E3521F969E7-4107-0000191504DD1B2E/86D37899-3B46-4BDA-B396-E5C8DD51068E.png]

虽迟但到！PHP8测评来了~

发现计算少情况下php8JIT是php7性能的13倍，而且计算越多优化越明显，计算多情况下php8JIT是php7性能的25.7倍。

但是有一个问题我觉得很神奇php8无JIT计算少的情况居然也优化了很多，我以为是测试方向的问题，但是经过多次论证，这个数据是准确的，有时间想找一下这里的优化点是什么。

编译过程

吐槽：php手动编译越来越麻烦了，编译了2个小时才编译完，踩了N个坑，为了让大家多写几个需求，把坑分享出来

环境

aliyun centos 6.9，咱们公司一般都是这个版本。

php源码编译

wget https://downloads.php.net/~carusogabriel/php-8.0.0alpha2.tar.gz

tar -zxf php-8.0.0alpha2.tar.gzcd php-8.0.0alpha2

./configure --prefix=/yourdir/php8 --with-config-file-path=/yourdir/php8/etc --enable-mysqlnd --with-mysqli=mysqlnd --with-pdo-mysql=mysqlnd --enable-fpm --enable-static --enable-sockets --with-zip --enable-calendar --enable-bcmath --enable-mbstring --with-zlib --with-iconv=/usr/local/libiconv --enable-gd --enable-mbstring --with-freetype --with-mysql-sock=/tmp/mysql.sock --disable-ipv6 --enable-debug --with-openssl --enable-opcache复制代码

这里一般都是makefile生成失败的，后面有生成失败的例子，生成成功后

make -j 8

make install

cp php.ini-production /yourdir/php8/etc/php.ini

配置php.ini

记住一定要把opcache.ini旧的配置也写上，JIT说到底还是对Opcache的优化。

zend_extension=opcache.so
opcache.enable=1

; 命令行测试的话这里一定要打开
opcache.enable_cli=1
opcache.memory_consumption=512
opcache.interned_strings_buffer=8
opcache.max_accelerated_files=10000
opcache.validate_timestamps=1
opcache.revalidate_freq=300
opcache.fast_shutdown=1
opcache.enable_file_override = 1
opcache.blacklist_filename = /etc/php.d/opcache.blacklist

; 这里就是新的jit的配置
opcache.jit=1205
opcache.jit_buffer_size=64M

configure失败解决方法

这里解决./configure 失败的一些问题

问题一
No package 'sqlite3' found

解决办法

wget https://www.sqlite.org/2020/sqlite-autoconf-3320300.tar.gz

tar -zxf sqlite-autoconf-3320300.tar.gzcd sqlite-autoconf-3320300

./configure --prefix=/usr/local/lib/sqlite-3.32.0

make CFLAGS="-g -O2 -DSQLITE_ENABLE_COLUMN_METADATA"make installexport PKG_CONFIG_PATH="$PKG_CONFIG_PATH:/usr/local/lib/sqlite-3.32.0/lib/pkgconfig"复制代码

注意

直接这样是不行的，yum仓库里的版本太低。

yum install sqlite-devel

问题二

configure: error: Please reinstall the iconv library.

解决办法

wget http://ftp.gnu.org/pub/gnu/libiconv/libiconv-1.14.tar.gz

tar -zxf libiconv-1.14.tar.gzcd libiconv-1.14

./configure 

make 

make install

问题三

No package 'oniguruma' found

同样yum也是不行的，版本太低。

yum install oniguruma-devel

解决办法

wget https://github.com/kkos/oniguruma/archive/v6.9.5_rev1.tar.gz

tar -zxf v6.9.5_rev1.tar.gzcd oniguruma-6.9.5_rev1/ 

autoreconf -vfi

./configure --prefix=/usr/local/lib/oniguruma-6.9.5

make 

make installexport PKG_CONFIG_PATH="$PKG_CONFIG_PATH:/usr/local/lib/oniguruma-6.9.5/lib/pkgconfig"

问题四

No package 'libzip' found

解决办法

wget https://libzip.org/download/libzip-1.7.2.tar.gz

tar -zxf libzip-1.7.2.tar.gzcd libzip-1.7.2

cmake3 -DCMAKE_INSTALL_PREFIX=/usr/local/lib/libzip-1.7.2

make 

make installexport PKG_CONFIG_PATH="$PKG_CONFIG_PATH:/usr/local/lib/libzip-1.7.2/lib/pkgconfig"复制代码

Enjoy php 8 & JIT !


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