By Armando Padilla, DUPTim Hawkins

Kurzbeschreibung

Pro Hypertext Preprocessor software functionality may also help you already know all of the applied sciences and elements which play a job in how good your purposes run. whilst seconds can suggest the adaptation among maintaining a consumer and wasting a person, it can be crucial for we all to have optimization as a part of our undertaking roadmap. yet what elements inside your program in the event you examine? How when you optimize? and the way are you able to degree how good your program is acting? those are a number of the questions which are spoke back during this e-book.

Along how you also will research the "why" of optimizing. you will find why you might want to optimize a selected part, why settling on one functionality over one other is helpful, and the way to discover and use the optimization instruments on hand to the open resource group. you are going to additionally installation caching software program in addition to internet server software program. seasoned personal home page software functionality also will educate you extra complicated thoughts, reminiscent of:

Using Xdebug to profile services that aren't operating as successfully as attainable.
Comparing opcode achieved by way of diversified personal home page capabilities to slender the quest for capabilities that run successfully.
Using strace to research Apache whereas your program is served to the consumer.

Once you entire this booklet you have an entire experience of the place to begin optimizing and, most significantly, have the instruments which let you proceed optimizing in different personal home page functions going ahead. What you are going to study * the right way to increase the functionality of latest Hypertext Preprocessor functions * how one can maximize the functionality of present working structures and databases * the right way to refactor present personal home page code for larger functionality * tips on how to determine and rectify bottlenecks in personal home page code * tips on how to make the most of variable caching to extend functionality * concepts for choosing server for top functionality Who this ebook is for This publication will entice confirmed personal home page builders who desire to write new, complicated functions or are looking to rearchitect latest ones. builders of different languages similar to Ruby, Python, and VB.NET also will be interested within the ideas for tuning the functionality of net servers, databases, and working platforms. desk of Contents * Benchmarking thoughts * bettering customer obtain and Rendering functionality * Hypertext Preprocessor Code Optimization * Opcode Caching * Variable Caching * selecting the right net Server * internet Server and supply Optimization * Database Optimization * fitting Apache, MySQL, personal home page, and PECL on home windows * fitting Apache, MySQL, Hypertext Preprocessor, and PECL on Linux

Über den Autor

Armando Padilla has over 10 years within the Hypertext Preprocessor neighborhood, and has contributed personal home page improvement of asset administration instruments to either past due evening with Conan O'Brien and Saturday evening dwell, and lately contributed to the Zend Frameworks? powered Dundermifflininfinity.com social networking website, an NBC.com undertaking for The place of work. he's at the moment an energetic Hypertext Preprocessor developer at Yahoo! and is operating on his MS within the machine technology, semantic internet, and information mining fields.

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Additional resources for Pro PHP Application Performance: Tuning PHP Web Projects for Maximum Performance

Sample text

The second rule reduces the total number of images the browser is required to fetch by combining the images within a page into, in some cases, a single file. JavaScript Optimization As noted in the beginning of this chapter, we can optimize JavaScript. Here are three rules YSlow uses to check JavaScript: • Place JavaScript at the bottom of the HTML. • Minify JavaScript. • Make JavaScript external. Once again, we look to optimize the size of the response as well as the method in which the browser renders the content for the user.

Figure 1–7. com/ with ten concurrent users for 20 seconds The results in this simulation point to a decrease in performance when ten concurrent users request the web document over a period of 20 seconds. 8 seconds). AB Gotchas There are a few caveats when using ab. If you look back at the command you just executed, you’ll notice a backward slash at the end of the domain name. The backslash is required if you are not requesting a specific document within the domain. ab can also be blocked by some web servers due to the user-agent value it passes to the web server, so you might receive no data in some cases.

The side-byside comparison is shown in Figures 1–12 and 1–13. Figure 1–12. Results for ab test of five concurrent periods of ten seconds Figure 1–13. Results for ab test using Keep-Alive 23 CHAPTER 1 ■ BENCHMARKING TECHNIQUES Comparing both figures and referencing the Requests per second, Total min, and Total max, we can clearly see that using Keep-Alive drastically increases the number of requests per second the web server can satisfy and also increases the response time. With a solid foundation of the measuring tools we will use to rate our success in optimizing our code, it’s time to start optimizing for performance.

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