|
|
 |
|
|
A Look at PHP Accelerators by Margarette Mcbride
|
|
|
A Look at PHP Accelerators |
|
|
|
|
|
Website Design
|
|
One of today’s most popular server-side scripting languages that many web programmers use in web development is PHP. And there are many reasons why many had preferred the use of PHP rather than the use of other types of server-side scripting languages, such as Microsoft’s ASP. These reasons include the PHP accelerator.
What is a PHP Accelerator? A PHP accelerator is a PHP extension designed to improve the performance of software applications written in the PHP programming language.
According to many php developers experts, most PHP accelerators work by caching the compiled bytecode of PHP scripts to avoid the overhead of parsing and compiling source code on each request (some or even most of which may never be executed). To further improve performance, the cached code is stored in shared memory and directly executed from there, minimizing the amount of slow disk reads and memory copying at runtime.
Advantages PHP accelerators can substantially increase the speed of PHP applications. Improvements of web page generation throughput by factors of 2 to 7 have been observed.
The effect on application performance of opcode caching varies widely, depending on factors such as the inherent execution time of the PHP application and the percentage of source code actually executed on a given request, and whether additional optimization steps are performed.
According to many web developer Philippines experts, while a code optimizer may even slow down overall performance when used in isolation, it can provide an additional performance boost when coupled with a bytecode cache, as the optimization effort is performed just once.
A Popular Example of PHP Accelerator eAccelerator is a PHP accelerator derived from the MMCache extension for the PHP programming language. eAccelerator provides a bytecode cache. eAccelerator is open source and thereby free to use and distribute. Old and unmaintained versions also provided an encoder.
Every time a PHP script is accessed, PHP usually parses and compiles scripts to bytecode. Once installed, eAccelerator optimizes the compiled bytecode and caches this to shared memory or disk or both. Upon subsequent accesses to a script, eAccelerator will access cached bytecode if it is available instead of the script being compiled. This avoids the performance overhead of repeated parsing and compilation.
Previous eAccelerator versions also provided functions for use in PHP scripts that allow access to shared memory, automatic web (content) caching, and other related tasks. These were removed as of version 0.9.6rc1.
Old eAccelerator versions had an encoder component that creates a file that cannot be as easily read as a normal PHP script, offering some code protection. A dedicated extension named eLoader is available to process such encoded scripts if the eAccelerator extension is not desired. This functionality has been removed from the current developer version and will not be part of the next release.
Related Articles -
PHP developers, web developer Philippines,
|
Rate This Article  |
|
|
|
|
|
Do you Agree or Disagree? Have a Comment? POST IT!
| Reader Opinions |
|
|
|
|
|
|
|
|
|
| Author Login |
|
|
 |
Advertiser Login
ADVERTISE HERE NOW!
Limited Time $60 Offer!
90 Days-1.5 Million Views
|
|
LAURA JEEVES
At LeadGenerators, we specialise in content-led Online Marketing Strategies for our clients in the t...more
|
|
|
|
|
TIM FAY
After 60-plus years of living, I am just trying to pass down some of the information that I have lea...more
|
|
|
|
|
ADRIAN JOELE
I have been involved in nutrition and weight management for over 12 years and I like to share my kn...more
|
|
|
|
|
GENE MYERS
Author of four books and two screenplays; frequent magazine contributor. I have four other books "in...more
|
|
|
|
|
DONNIE LEWIS
I'm an avid consumer of a smoothie a day living, herbs, vitamins and daily dose of exercise. I'm 60...more
|
|
|
|
|
ALEX BELSEY
I am the editor of QUAY Magazine, a B2B publication based in the South West of the UK. I am also the...more
|
|
|
|
|
SUSAN FRIESEN
Located in the lower mainland of B.C., Susan Friesen is a visionary brand strategist, entrepreneur, ...more
|
|
|
|
|
STEPHEN BYE
Steve Bye is currently a fiction writer, who published his first novel, ‘Looking Forward Through the...more
|
|
|
|
|
STEVE BURGESS
Steve Burgess is a freelance technology writer, a practicing computer forensics specialist as the pr...more
|
|
|
|
