I have been working with all platforms about 15 years now. I used to write bat files in dos5 now I am writing java code with eclipse and c# with vs.net . anyway here is the story about the funny ide :)
I was writing some AJAX application in eclipse which has to call a ten thousand line js file from browser and call some function from there. first of all writing that much big js file is a big big mistake from all perspectives. and deploying this big file to a browser another mistake but its a big project since 2006 its written by some people. I can not change that in 1 day.
when I start to turn mouse wheel eclipse understands later the effect and when I stop it could not stop :) and line numbers comes later too. it means I have to a lot of CPU and RAM for that. but its like walking with a big dog :D