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...suggest to start with you just look at moving the libmagic check after > the filesize checks, so you don't need to get into whether libmagic or > the database check is cheaper on average. hi, Olly, I have moved the libmagic check after the filesize check directly, https://github.com/caiyulun/xapian/commit/3a97d9ee5397fa900a473aa9b3d8eeb720177a4e can you provide your comments on it and give some advice about the next steps? I think it is hard to say which is cheaper between the libmagic and database check Thanks 2017-04-21 13:37 GMT+08:00 Olly Betts <olly at survex.com>: &g...

Hi, I'm working on the ticket #743 omindex: delay libmagic checks <https://trac.xapian.org/ticket/743>. As the ticket's Description mention, the call to libmagic is expensive than call the stat, so we can check the size by call the stat to get size before call libmagic to get a mime type. But how about the timestamps check? since timestamps check need to iterate the DB to check if

I am interested in the project 'Learning to Rank Click Data Mining', and here is my current understanding about this project: 1. where can we get your click data. we can extend the omega to supports log the user's search and clicked documents 2. the specific click data information and format. Based on some paper and public query dataset format(AOL search query logs[1] and Sogou