Navigate into Performance folder. 

## Install Composer - Dependency Manager for PHP  
https://getcomposer.org/

### Windows
Download and run Composer-Setup.exe https://getcomposer.org/Composer-Setup.exe

### UNIX

    php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
    php -r "if (hash_file('SHA384', 'composer-setup.php') === '669656bab3166a7aff8a7506b8cb2d1c292f042046c5a994c43155c0be6190fa0355160742ab2e1c88d40d5be660b410') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"
    php composer-setup.php
    php -r "unlink('composer-setup.php');"
    
## Install PHPBench
    
    composer require phpbench/phpbench @dev --dev