Why does appending tags to a tag file tag so long?
Sometimes, in an attempt to build a global tag file for all source files in a large source tree of many directories, someone will make an attempt to run ctags in append (-a) mode on every directory in the hierarchy. Each time ctags is invoked, its default behavior is to sort the tag file once the tags for that pass have been added. As the cumulative tag file grows, the sort time increases exponentially.
