Today we had a problem on the server: our app was causing the application pool to crash. Windows error reporting didn’t give a clear result of what was causing a stack overflow exception within the app. No stack-trace, no nothing. So how to solve a problem like this?
I noticed that the Time To First Byte (TTFB) of my website was taking way too long. First I thought it should be resolved by caching, but I noticed that it couldn’t be the caching, because TTFB kept being pretty high. After some research I found the culprit: IPv6 with the MySQL driver.
I love SASS. What’s not to love? Well… it can’t be served directly by the web server like CSS. It needs to be pre-compiled before it is served. Fortunately there is a PHP SASS compiler that can be used to make PHP compile and serve SASS. I’m using an IIS installation, so I’ll be explaining how it can be done on a Windows machine.