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Hi,Each searches on the wiki use this function. Scanning the index directory each time is time consuming with a constant series of disk access. Switching a normal search to use file_exists 1 or more times, and not readdir all the directory. Switching a wildcard search to use a lengths.idx file containing all the word lengths used in the wiki, file generated if a new configuration parameter $conf[readdircache] is not false and fixed to a time in second.
I write also the simpletest to see the time improvments on my local install. I think it's not really good but it tests also the function works like expected.
Thanks YoBoY