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Cached, PHP generated Thumbnails load slowly

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-genera...
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Why do people put code like “throw 1; ” and “for(;;);” in front of json responses? [du

Google returns json like this: 4 Answers 4 ...
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In PHP, what is a closure and why does it use the “use” identifier?

I'm checking out some PHP 5.3.0 features and ran across some code on the site that looks quite funny: 6 Answers ...
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Difference between const & const volatile

If we declare a variable as volatile every time the fresh value is updated If we declare a variable as const then the value of that variable will not be changed ...
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PHP function to make slug (URL string)

I want to have a function to create slugs from Unicode strings, e.g. gen_slug('Andrés Cortez') should return andres-cortez . How should I do that? ...
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When someone writes a new programming language, what do they write it IN?

Please excuse my ignorance. I'm dabbling in PHP and getting my feet wet browsing SO, and feel compelled to ask a question that I've been wondering about for years: ...
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What is a word boundary in regex?

I am using Java regexes in Java 1.6 (to parse numeric output, among other purposes) and cannot find a precise definition of \b ("word boundary"). I had assumed that -12 would be an "integer word" (matched by \b\-?\d+\b ) but it appears that this does not work. I'd be grateful to know of ways ...
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How to initialise memory with new operator in C++?

I'm just beginning to get into C++ and I want to pick up some good habits. If I have just allocated an array of type int with the new operator, how can I initialise them all to 0 without looping through them all myself? Should I just use memset ? Is there a “C++” way to do it? ...
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What is the difference between require_relative and require in Ruby?

What is the difference between require_relative and require in Ruby? 7 Answers 7 ...
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How do you rename a Git tag?

Today I was looking through the logs for a project and realized that I fat fingered a tag name some time ago. Is there some way to rename the tag? Google hasn't turned up anything useful. ...