What is the fastest HDL simulator you have used?

[gliss]

Fastest HDL simulator?

Which is the fastest HDL simulator you have you used?
Out of the ones I've tried: ModelSim, VCS and IUS (LDV), I would say VCS is the fastest. Although I use ModelSim mostly because that is what is most popular and easiest to use.
Any thoughts?

 

[eda_wiz]

Fastest HDL simulator?

For gate level sim NCverilog is defintely faster

 

[gliss]

Fastest HDL simulator?

How long have you been using LDV and what systems do you use it on?