[wp-hackers] Use of ENGINE=MEMORY w/ dbDelta() possible?

[Thomas Bukowski]

On Mar 24, 2008, at 1:07 AM, Mahmoud Al-Qudsi wrote:

>> As a final note on this.. Is it worth running a mysql memory cache  
>> like
>> this if you've got access ot mysql itself.
>> There are a few settings which allows mysql to cache queries much  
>> more
>> efficiently, so that repeditive queries from WP are stored in  
>> memory..
>> http://weblogtoolscollection.com/archives/2005/04/06/optimize-your-
>> database/
>> http://www.arnebrachhold.de/2007/02/16/four-plus-one-ways-to-speed- 
>> up-
>> the-performance-of-wordpress-with-caching/ ("MySQL Query Cache")
>
> This doesn't require access to the MySQL configuration files, and  
> *should* run anywhere that WP can/does.
>
> But the bottom line is that caching to MySQL is horribly inefficient.

But I wonder if it is just that tiny little bit more efficient than  
not caching at all? Is it an entirely negligible improvement?