> I think you benchmark is flawed. You say you have 20_000 random 
> entries, but you only make 2723 queries.

How did you determine that I made only 2723 queries? The benchmark shows that I made 40_000 queries for each code fragment at a rate of 2723 queries per second with the memcache process and 3846 queries per second with the straight-from-db process. Or, am I reading the results wrong?

Update: Here is another measurement, this time using timethese. The results are the same as before. 

 query_dbh: 24 wallclock secs ( 5.28 usr +  5.29 sys = 10.57 CPU) @ 37
+84.30/s (n=40000)
 query_mem: 70 wallclock secs ( 7.80 usr +  6.08 sys = 13.88 CPU) @ 28
+81.84/s (n=40000)

[download]

Whatever I am doing, it is far faster to open up the SQLite database every time and query it than it is to query the memory cached value. (I am creating a $dbh and $sth every time, and also opening a file and writing to it every time to kinda emulate a CGI process that starts afresh on every hit of the browser.



when small people start casting long shadows, it is time to go to bed

In reply to Re^2: learning memcached by punkish
in thread learning memcached by punkish

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