Directory structure:

.
|-- seed.sh               (Shell script)
|-- benchmark.pl          (The runner we just wrote)
|-- _site
|   |-- cgi-bin
|   |   |-- indexer.pl    (Creates the SA index)
|   |   |-- find_sa.cgi   (Suffix Array search)
|   |   `-- find_regex.cgi (Regex search)
|   `-- log/              (Created by seed.sh)

chmod +x seed.sh benchmark.pl _site/cgi-bin/*.cgi _site/cgi-bin/*.pl
perl benchmark.pl 3 10 50