Re: [HACKERS] Binary search in fmgr_isbuiltin() is a bottleneck.

On Wed, Sep 27, 2017 at 11:18 AM, Robert Haas <robertmhaas@gmail.com> wrote:
> No, I think what Andres is saying is that we ought to build the hash
> table before we ever reach this function, so that we don't have to
> have a branch here to check whether it's been done.  I don't see why
> that's particularly hard -- it can be jammed into the startup sequence
> someplace early, I assume.  In EXEC_BACKEND builds it will have to be
> redone in each child, but that's just a matter of sticking a call into
> SubPostmasterMain() as well as PostMasterMain().

I suppose an even better approach would be to build a perfect hash
table at compile time so that nothing needs to be built at run-time at
all, but I'm not sure it's worth the trouble.

-- 
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company


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