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Re:How YouPorn Uses Redis: SFW Edition by justinmares on Wednesday July 31, 2013 @06:39PM (#6137290)
I believe DuckDuckGo is using Perl, or were as of a few years ago.

Source: http://www.gabrielweinberg.com/blog/2009/03/duck-duck-go-arc...

Re:How YouPorn Uses Redis: SFW Edition by clark-kent on Wednesday July 31, 2013 @09:48PM (#6138106)
Re:How YouPorn Uses Redis: SFW Edition by jamesjporter on Wednesday July 31, 2013 @08:53PM (#6137909)
This plugin infrastructure uses Perl, so they definitely haven't moved away from it entirely http://duckduckhack.com/
Re:How YouPorn Uses Redis: SFW Edition by aroman on Wednesday July 31, 2013 @11:15PM (#6138438)
Talking to a friend of mine who works there, they haven't moved away from it at all really.

They've been optimizing the heck out of it, and as much as my kneejerk reaction to their infrastructure is "a collage of rubberbands and paperclips waiting to break in unexpected and unpredictable ways", I've gotta hand it to them for not giving in to the temptation to prematurely optimize. Clearly it's been working really well for them, and so I guess it's worth not "fixing" it until it starts breaking.

Re:How YouPorn Uses Redis: SFW Edition by boyter on Wednesday July 31, 2013 @09:31PM (#6138055)
Blekko is another, which is very impressive considering they do their own indexing and serving of results.