Please take a look
This code is enormously inefficient. For a single abbr_search(), it calls
timelib_strcasecmp() more than 1000 times (complete linear search in a huge
almost ordered array, with repeatable and redundant lowercasing). 11 calls
to abbr_search() per request in the Symfony Demo application (
https://github.com/symfony/demo) eat 2% of overall CPU time.
I see some other inefficient patterns in timelib. e.g. API design that
leads to many useless heap allocations/deallocations; calloc() followed by