I don't think there is an IDE slower than Eclipse.
Even NetBeans is faster.
You haven't had the pleasure of using VS 2012/2013 with Resharper, I see. My cursor lag while I type. Occasionally the entire IDE sputters to a halt, becoming unresponsive for seconds at a time, because Resharper decided to perform some static analysis on a 200-line Javascript file. On an 8-core, 32-GB RAM machine with an SSD.
Let that sink in for a second.
Yeah.
That's exactly the experience I had with Resharper when I installed it (and subsequently removed it for good after a few days) years ago when I still wrote C# code. I never understood the "Resharper is essential" attitude. Plain Visual Studio was just fine.
VS2012 and 2013 have caught up to Resharper's features. I still use Resharper's refactoring and Alt-enter shortcuts though.
"SSD" doesn't mean a whole lot. Sata 2 vs PCI Express is an order of magnitude of difference.
Sorry, but you seem to be confusing throughput with latency. It's very rare that a program locks for lack of disk throughput.
Intelli-J crawls on slow drives. Given ReSharper is also a JetBrains product, I assume the performance characteristics are similar.
I get that with VS 2010. Intelisense makes my computer stop for several seconds at times.
ReSharper is a crutch for .NET developers who are too lazy to learn all the features of Visual Studio and who get confused by LINQ. The best feature of ReSharper is the ability to easily turn itself off without totally un-installing; this allows you to conform to the notion of having ReSharper installed but not crippled by having to use it.
Antivirus?
Ehm. I primarily work with VS2013 + ReSharper. Works much faster than Netbeans/Eclipse/{AnotherEditorWrittenInJava}.
I use NetBeans on a daily basis and never find it to be slow. Eclipse on the other hand....it's a giant turtle monster masquerading as an IDE wrapper around OSGI.