So much this. Back in 2001 I used IntelliJ IDEA on a PC with 128MB of RAM. It worked perfectly, and it was the first IDE I used that checked my code while I was writing it. The much less evolved JBuilder on the other hand stopped every couple seconds for garbage collection.

Both were written in Java.

And don't get me started on Forte (developed by Sun itself, no less). It was even slower and more memory-hungry than JBuilder.