Performance of Fast Synchronous Search

[Jong-Hyuk <jongchoi@watson.ibm.com>]

Here is the performance evaluation result of the fast synchronous search 
along with those of the asynchronous search and the original synchronous 
search.

ftp://ftp.openldap.org/incoming/FastSyncSearchPerf.gif

As you can see in the graph, the performance of the original synchronous 
search becomes unacceptable even with moderate result sizes. With the 
fast synchronous search patch, the performance of the synchronous search 
becomes very close to the asynchronous search. The DN sort overhead 
(ldapsearch -S "")  should be considered when interpreting the small 
performance difference from the asynchronous search.

Now that ITS#3612 seems to be resolved (Luke ?), wondering when would be 
a good time to restore this patch in the release engineering. 

This patch is intended to enhance the response time characterics of 
various applications as many applications resort to the ease of use of 
the synchronous search. In addition to the above performance numbers of 
the synchronous searches in isolation, it would be very helpful in 
understanding its performance implications if you can provide your 
mileages with this patch in your configurations such as Samba, Heimdal, 
nss_ldap, and XAD.

Best regards,

- Jong-Hyuk