Joel Spolsky shares why they have their own compiler and how long it took them to write it.
Most people don’t realize that writing a compiler like this is only about 2 months work for one talented person who read the Dragon book.
While compilers seem like a thing of the past for many in the industry, I find it not to be so. Recently, I was participating in one project that had to do a lot with web, and web data aggregating. Somehow, we almost ended up writing our own compiler. The problem was tough and there seemed no other way to solve it. Unfortunately, the project took a different path and died later.