Re: FUNC_MAX_ARGS benchmarks

Tom Lane wrote:
> No, it was a 2% hit on rather slow functions with only one call made
> per query issued by the client.  This is not much of a stress test.
> 
> A more impressive comparison would be
> 
> select 2+2+2+2+2+2+ ... (iterate 10000 times or so)
> 
> and see how much that slows down.

I ran a crude test as follows (using a PHP script on the same machine. 
Nothing else going on at the same time):

do 100 times  select 2+2+2+2+2+2+ ... iterated 9901 times


#define INDEX_MAX_KEYS        16, 32, 64, & 128
#define FUNC_MAX_ARGS        INDEX_MAX_KEYS
make all
make install
initdb

The results were as follows:
INDEX_MAX_KEYS    16    32      64     128                -----+-------+------+--------
Time in seconds   48    49      51      55


Joe