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It seems that with growing number of MIME resolvers the recognizing of MIME types is getting slower. This is especialy a case for .xml files on SFS. I am not sure how many parsing is involved or whether we can coalecse these parsers to be able to effectively find the type of document. For instance several resolvers are sensitive to DOCTYPE only so we should not find doctype declaration several times. Possible workaround: perhaps specify preffered loader for critical files. (if this does not cause querying for MIME) This can be a contributor to our startup regression in 5.0.
-> P3
Some fixing done for 6.0 in issue 117781. MIME resolution scaling is tracked for future fixing in issue 117319 now. Closing as duplicate. *** This issue has been marked as a duplicate of 117319 ***