站長資訊網6月25號php 8 alpha 1發布，7月9號 php 8 alpha 2發布，一般alpha 2是一個稍微能用的版本，所以周末測評了一下php8 JIT到底是個什么？
先看一下結果：
JIT不開啟的情況下
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開啟的情況下：
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
還有不打開Opcache的情況下：
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
不開啟Opcache : 2.299s 開啟Opcache不開啟JIT情況下：1.419s 開啟Opcache且開啟JIT情況下：0.155s
開啟JIT情況下是不開啟JIT情況下的接近9.15倍，多次測試這個值穩定在8倍到10倍之間。
MPF表現如何？
為了接近我們的業務，所以在mpf框架下進行測試
環境
aliyun centos 6.9
php7.test.com php-fpm一個進程 php8.test.com php-fpm一個進程
Mpf兩個接口
/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); }
我們壓測一下
php7 計算少情況
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 計算多情況
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開啟計算少情況
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開啟計算多情況
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關閉計算少情況
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關閉計算多情況
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
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發現計算少情況下php8JIT是php7性能的13倍，而且計算越多優化越明顯，計算多情況下php8JIT是php7性能的25.7倍。
但是有一個問題我覺得很神奇php8無JIT計算少的情況居然也優化了很多，我以為是測試方向的問題，但是經過多次論證，這個數據是準確的，有時間想找一下這里的優化點是什么。
編譯過程
吐槽：php手動編譯越來越麻煩了，編譯了2個小時才編譯完，踩了N個坑，為了讓大家多寫幾個需求，把坑分享出來
環境
aliyun centos 6.9，咱們公司一般都是這個版本。
php源碼編譯
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復制代碼
這里一般都是makefile生成失敗的，后面有生成失敗的例子，生成成功后
make -j 8 make install cp php.ini-production /yourdir/php8/etc/php.ini
配置php.ini
記住一定要把opcache.ini舊的配置也寫上，JIT說到底還是對Opcache的優化。
zend_extension=opcache.so opcache.enable=1 ; 命令行測試的話這里一定要打開 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 ; 這里就是新的jit的配置 opcache.jit=1205 opcache.jit_buffer_size=64M
configure失敗解決方法
這里解決./configure 失敗的一些問題
問題一
No package 'sqlite3' found
解決辦法
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="$PKG_CONFIG_PATH:/usr/local/lib/sqlite-3.32.0/lib/pkgconfig"復制代碼
注意
直接這樣是不行的，yum倉庫里的版本太低。
yum install sqlite-devel
問題二
configure: error: Please reinstall the iconv library.
解決辦法
wget http://ftp.gnu.org/pub/gnu/libiconv/libiconv-1.14.tar.gz tar -zxf libiconv-1.14.tar.gzcd libiconv-1.14 ./configure make make install
問題三
No package 'oniguruma' found
同樣yum也是不行的，版本太低。
yum install oniguruma-devel
解決辦法
wget https://github.com/kkos/oniguruma/archive/v6.9.5_rev1.tar.gz tar -zxf v6.9.5_rev1.tar.gzcd oniguruma-6.9.5_rev1/ autoreconf -vfi ./configure --prefix=/usr/local/lib/oniguruma-6.9.5 make make installexport PKG_CONFIG_PATH="$PKG_CONFIG_PATH:/usr/local/lib/oniguruma-6.9.5/lib/pkgconfig"
問題四
No package 'libzip' found
解決辦法
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"復制代碼
Enjoy php 8 & JIT !
