Re: Solaris sed based apache filtering module (mod_sed)

[Ruediger Pluem]

On 10.04.2008 22:09, Basant Kukreja wrote:

Here is some more performance results based on Ruediger's suggestion :

Thanks for this.

-------------------------------------------------------------------------
test2.html : 500 substitution s/hello/hi/g.
Requests Per Second (RPS) as measured by ab for s/hello/hi/ substitution.
Enabled CPUs : 1
testname       Concur  MaxReq  mod_sed    mod_line_edit   mod_substitute  
mod_substitute(with n flag)
                                RPS         RPS               RPS
test2.html       100   100000   1278         404              1130             
1531

Summary :
On simple string substitution (s/hello/hi/) mod_sed perform better than
mod_substitue but with flag [n] mod_substitute performed better than
mod_sed.
-------------------------------------------------------------------------
Test case summary : pattern capture
Regular expression used : OutputSed 
's/.*\(one\).*\(two\).*\(three\).*\(four\).*\(five\).*/\5 \4 \3 \2 \1/'
                        : Substitute "s/.*(one).*(two).*(three).*(four).*(five).*/$5 
$4 $3 $2 $1/"
String : hello one 1 two 2 three 3 four 4 five 5.
Enabled CPUs : 4
test12.html : 500 lines containing the above string (Result in 500 
substitution).

testname Concur MaxReq mod_sed mod_substitute RPS RPS test12.html 125 100000 1322 3230

Summary :
With pattern capture, mod_substitute performed much better than mod_sed.
-------------------------------------------------------------------------
Test case summary : test for simple regular expression.
Regular expression used : OutputSed 's/.*one.*two/1 2/'
                        : Substitute "s/.*one.*two/1 2/"
String : hello one 1 two 2 three 3 four 4 five 5.
Enabled CPUs : 4
test22.html : 500 lines containing the above string (Result in 500 
substitution).

testname Concur MaxReq mod_sed mod_substitute RPS RPS test22.html 400 400000 2013 1689

Summary :
With ordinary regular expression, mod_sed performed better than
mod_substitute.
-------------------------------------------------------------------------

mod_substitute (what is available in 2.2.8 is leaking memory) so the above
performance results must be repeated with new mod_substitute from trunk (to
have better comparison).

Any more details in which situations you see memory leaks? The same leaks
should happen on trunk as well.

Regards

Rüdiger