CCNA, CCNP, MCSA, CCNA Final Exam, All Answer Test Module With 100/100

Question Part A ▉ (100 bountys, awarded) Main question was how to make this site, load faster. First we needed to read these waterfalls. Thanks all for your suggestions on the waterfall readout analysis. Evident from the various waterfall graphs shown here is the main bottleneck: the PHP-generated thumbnails. The protocol-less jquery loading from CDN advised by David got my bounty, albeit making my site only 3% faster overall, and while not answering the site's main bottleneck. Time for for clarification of my question, and, another bounty:

Almost everyone has a Facebook account, even people who are not familiar with the Internet. With millions people actively using Facebook, updating their status, replying to messages, uploading photos and so on, how is Facebook's page still loading very fast?

I have a 2.67 GHz Celeron processor, 1.21 GB of RAM on a x86 Windows XP Professional machine. My understanding is that the Android emulator should start fairly quickly on such a machine, but for me it does not. I have followed all instructions in setting up the IDE, SDKs, JDKs and such and have had some success in staring the emulator quickly but is very particulary. How can I, if possible, fix this problem?

We have all heard of how in a for loop, we should do this:

Which profiler is better for general purpose profiling and heap analysis? 90% of our apps are standalone command line programs with substantial database and numeric processing. The other 10% are webapps/servlet container apps (with very little JSP and NO SCRIPLETS!). Target user would be Sr Software Engineer with 5-10 years of industry experience. We need support only for Sun JDK 5 and.

I have Yslow add-on installed When I checks my application in Yslow I get Add Expires headers which I don't know

I was surprised to learn today that PHP is used widely in high-traffic websites.

do you know if count() in PHP really counts the all elements of a PHP-array, or if this value is cached somewhere and just needs to be retrieved?

I'm interested in the performance of templating languages in PHP. I've been watching node.js tutorials and am really impressed by the use of JADE (http://jade-lang.com).

I'm playing with some piece of code calculating the time needed to compute some Java code to get a feeling of the efficiency or inefficiency of some of Java's functionality. Doing so I'm stuck now with some really strange effect I just can't explain myself. Maybe someone of you can help me understand it.

I have a program written in Java and a native launcher written in C++, based on a sample at http://www.codeproject.com/Articles/17352/JVM-Launcher . A strange thing is that running my program with my native launcher take more CPU than using java.exe (~5% vs 15-20%). I have been giving this situation some thought but it still doesn't make much sense. I've tried increasing the JVM heap size, (re)built the native launcher in release mode, used different JRE version(1.6_24, 1.6_31, 1.7_03) but no luck.

i have a simple question: Should i resize a bigger bitmap before adding to a ImageView or let the ImageView resize the Bitmap? What's the right way, regarding performance?

I have a page which is very slow, not in loading, but in terms of the responsiveness of typing into the form fields on the page.

I'm writing some javascript code which needs to run fast, and uses a lot of short-lived objects. Am I better off using an object pool, or just creating objects as I need them?

Scroll down for the getById.getByClassName vs. qSA comparison! If we wanted to select all elements of class "bar" which are inside the element with the ID "foo" , we could write this:

I have decided to make a new web app. The web app would be high concurrency and using Socket.io. to implement streaming data in realtime.

I am trying to build a basic plugin system like the kind you often find in a CMS like WordPress. You have a folder of plugins which tie into the main system's operation through event notifications using an Observer or Event design pattern.

We have a low latency trading system (feed handlers, analytics, order entry) written in Java. It uses TCP and UDP extensively, it does not use Infiniband or other non-standard networking.

I just wrote a $().bind('event') function and then got concerned that this kind of a call might be very expensive if jQuery has to run through each element in the DOM to bind this event. Or maybe, it's just about as efficient as an event could be. The jQuery docs I've read aren't making this clear. Any opinions? Source: Tips4all

I am working on a Drupal based site and notice there are a lot of seperate CSS and js files. Wading though some of the code I can also see quite a few cases where many queries are used too. What techniques have you tried to improve the performance of Drupal and what modules (if any) do you use to improve the performance of Drupal 'out of the box'? Source: Tips4all