[colin_mccabe]

I have used both Eclipse and Intellij for building Hadoop, and neither could get incremental compilation under 30 seconds. In fact, it was often much more than that. Eclipse was a huge pain to use with Hadoop because it was always getting something wrong-- many times when you updated the project dependencies, Eclipse would essentially break and need manual fixing. Even loading up the project in either IDE takes at least a solid minute, with an SSD, Intel i7, and 16 GB of RAM.

Prior to using Java, I used C++ for 10 years. Every project I worked on had compile time problems. It was an open secret that we spent most of our time waiting for compiles.

It's very common for people working on small projects to feel good about their compile times. But sometimes projects grow up, and they outgrow the language and the tools they were designed in.