CHECK vs REFERENCES

Which is faster, where the list involved is fixed?  My thought is that 
since it doesn't have to check a seperate table, the CHECK itself should 
be the faster of the two, but I can't find anything that seems to validate 
that theory ...

The case is where I just want to check that a value being inserted is one 
of a few possible values, with that list of values rarely (if ever) 
changing, so havng a 'flexible list' REFERENCED seems relatively overkill 
...

Thoughts, or pointers to a doc that disproves, or proves, what I believe?

Thanks ...

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Marc G. Fournier           Hub.Org Networking Services (http://www.hub.org)
Email: scrappy@hub.org           Yahoo!: yscrappy              ICQ: 7615664