Benchmarking PHP 8 alpha2

benchmark.md

Benchmarking PHP 7.4.7 vs. PHP 8 alpha2

I executed the Zend\bench.php file using PHP 7.4.7 and PHP 8 alpha2.

I used a CPU Intel i9-8950HK at 2.90GHz with 32GB RAM running Ubuntu 18.04.4 LTS.

I compiled PHP 8 alpha2 using the official php.net source and installed in /opt/php/php8. I used the following configure options:

./configure --prefix=/opt/php/php8 --enable-opcache --with-zlib --enable-zip --enable-json --enable-sockets --without-pear

I used the PHP 7.4.7 version using the ppa:ondrej/php repository.

To run the benchmark I used the command as follows:

PHP 7.4.7

php -d opcache.enable_cli=0 Zend/bench.php

PHP 7.4.7 + opcache

php -d opcache.enable_cli=1 Zend/bench.php

PHP 8 alpha2

/opt/php/php8/bin/php -d opcache.enable_cli=0 Zend/bench.php

PHP 8 alpha2 + opcache

/opt/php/php8/bin/php -d opcache.enable_cli=1 Zend/bench.php

PHP 8 alpha2 + JIT (1235)

/opt/php/php8/bin/php -d opcache.enable_cli=1 -d opcache.jit_buffer_size=128M -d opcache.jit=1235 Zend/bench.php

Results

I run the experiment 5 times for each PHP configuration and I took the average (last row in the table). The time are reported in seconds.

PHP 7.4	PHP 7.4 + opcache	PHP 8 alpha 2	PHP 8 alpha2 + opcache	PHP 8 alpha 2 + JIT (1235)
0.315	0.191	0.283	0.196	0.089
0.316	0.190	0.289	0.191	0.104
0.315	0.221	0.284	0.194	0.093
0.323	0.185	0.28	0.202	0.089
0.317	0.193	0.303	0.190	0.091
-----	-----	-----	-----	-----
0.317	0.196	0.288	0.195	0.093