optimisation of bash globs

Looking for a guide to optimising regexp matches in bash.

I have a script that loops over a very long list of URLs looking for patterns. Currently it looks a little like the fragment below. Is there a guide to optimising these kinds of matches?

if [[ ${url} == */oai/request ]]
then
    echo first option
elif [[ ${url} =~ .*/http://ift.tt/1IfhjAu ]]
then
    echo second option
elif [[ ${url} =~ .*/[Ee][Tt][dD]-[Dd][Bb]/.* ]]
then
    echo third option
elif [[ ${url} =~ .*/handle/[0-9]+/[0-9].* || ${url} =~ .*/browse.* ]]
then
    echo fourth option
else
    echo no-match option
fi