cgit vs. gitweb

Hi

I wanted to compare cgit against gitweb to see the effect of using libgit and internal caching. So I ran the attached scripts against http://hjemli.net/git/ and http://hjemli.net/cgi-bin/gitweb.cgi as a very simplistic benchmark.

The scripts forks a number of similar child processes (specified by $1) and then uses curl(1) to request the first log page of three repositories $2 times. This is an attempt to simulate concurrent requests for different pages/repositories (I chose the log-pages since they're pretty similar in cgit and gitweb, both showing info for 100 commits).

The numbers are the average of three runs, executed from another box on my subnet. To avoid a roundtrip to my ISP, the pages are accessed by a local hostname.

So, here's the results, as measured by time(1):

fork count|cached uncached gitweb.cgi
---- -----+------ -------- ----------
   0    10|  0.28     0.46      15.33
   1    10|  0.56     0.77      29.72
  10    10|  2.77     4.22     166.40

fork: number of child processes count: number of loop iterations, each requesting 3 different log-pages cached: results for cgit with caching enabled uncached: results for cgit with caching disabled gitweb.cgi: results for gitweb

If ((fork+1) * count * 3) is taken as a rough estimate of the total number of page requests, then requests/second looks like this:

 req| cached uncached gitweb.cgi
----+------- -------- ----------
  30| 107.14    65.22       1.96
  60| 107.14    77.92       2.01
 330| 119.13    78.20       1.98