[eluser]Kumar Chetan sharma[/eluser]
Here are my 10 cents.
I have been working as a technical consultant and my area of expertise is PHP. I am bound by NDAs so can't simply put a URL here but following two projects must be sufficient as high performance CI websites
a) Last year for more than 6 months I worked on a project that involved porting a legacy app running on Sun Sparc, using shell, Perl, Java, C, C++ & WingZ - an Informix based application to simple, Linux (RHEL), Apache, MySQL(Informix replacement), PHP & Flex as frontend UI. The number of people who worked on PHP were, surprise, 20. The task was to convert every possible UI to Flex and all backend data for flex will be provided by PHP, MySQL and Apache. Due to nick of time, budgetary constraints, recession & some technical constraints Shell, Perl & C/C++ part was left as such. The software is an enterprise system that controls VOIP, Telephony and Related communication server & hardware. The PHP framework was CI, compared to the complete system, the PHP code was just 2MB The framework generated XML for 300+ screens. Worked 24x7. Went through performance testing and what not.
b) Currently I am working for a green tech company. We are working on a portal that uses google maps heavily, communicates with a special hardware, uses JSON, my favourite prototype.js. The communication between web server and hardware is all through PHP no shell, perl, c, c++ or Java. Browser polls server every 30 seconds for some updates, I know about server push but that is not used intentionally. And the framework is CI. Hell lot of data transfer browser to server. If some one can comprehend we have a hearbeat algo which keeps checking if the hardware is "reachable" or not. The code base in this case bit bigger due to HTML, JS & CSS.
Architects for above given systems are silicon valley veterans. The code is easy to understand & in fact in both projects we had Java guys working on PHP and using word "awesome".
Apart from this, I have done some custom CMS and other web apps in CI.
Now, I can write a hello world in Joomla, Drupal, Wordpress, CakePHP and Zend, I have spent 10 years of my life in web applications, I still vote for CI. Its very easy, small footprint and fast framework.
