On Wed, 8 Apr 2009, Arnt Gulbrandsen wrote:
If 350 SELECTs and 350 SEARCHes are unpleasantly slow, what makes
you think that multimailbox search will be different?
Not «will be», «is».
The speedup (up to orders of magnitude depending on the search
expression) comes from two factors: The search itself is much
better optimised, and there's no need to compute those 350 UNSEENs,
EXISTSs and RECENTs.
You are engaged in the fallacy of believing that an implementation
aspect of your server is common to all other servers.