In my first job, I used C, vi, and cscope. In my second, Java and Eclipse. I was an order of magnitude more productive with an IDE. Some of it was the language

In my first job, I used C, vi, and cscope. In my second, Java and Eclipse. I was an order of magnitude more productive with an IDE. Some of it was the language (though I was actually pretty good at C and rusty at Java), but most of it came from the rapid feedback loop and improved code discoverability.