Use code optimization methods to improve the execution speed of PHP v5.1 applications. PHP programs that use Zend Optimizer are 40% to 100% faster than those without, which means that website visitors can browse web pages faster, thus Get more done, create better customer satisfaction, and faster responses also mean savings on hardware investment and enhanced services provided by the website. Therefore, using Zend Optimizer is equivalent to improving the profitability of e-commerce.