[Hackage] #809: Improve update performance

[Hackage]

#809: Improve update performance
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  Reporter:  bos                 |        Owner:      
      Type:  enhancement         |       Status:  new 
  Priority:  normal              |    Milestone:      
 Component:  cabal-install tool  |      Version:  HEAD
  Severity:  normal              |     Keywords:      
Difficulty:  unknown             |   Ghcversion:      
  Platform:                      |  
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 I have an automated package build set up using Hudson, and it tries to
 build my code as often as once every 5 minutes.  Right now, that means
 running cabal update before every build, which takes at least 30 seconds.
 It would be great if cabal update used the ETag and If-Modified-Since HTTP
 headers to do conditional fetches of the metadata, so that there would be
 far less of a performance hit to both the Hackage server and my client.

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Ticket URL: <http://hackage.haskell.org/trac/hackage/ticket/809>
Hackage <http://haskell.org/cabal/>
Hackage: Cabal and related projects