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yesod/yesod-core/Yesod/Internal
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Felipe Lessa b2a9beba3c Use a cache for session cookie's expiration time. 
The following HelloWorld app was used as benchmark:

  data HelloWorld = HelloWorld
  mkYesod "HelloWorld" [parseRoutes|
    / HomeR GET
  |]

  instance Yesod HelloWorld where
    -- makeSessionBackend = const $ return Nothing

  getHomeR = return . RepPlain . toContent $ "Hello World!"

  main :: IO ()
  main = warp 8080 HelloWorld

The benchmark was tested with httperf under the following
environments:

  [vanilla-nosession] Released yesod-core 1.1.1.1, but without sessions.

  [vanilla-session] Released yesod-core 1.1.1.1 (with sessions).

  [faster-session-1] With patch 065e33a, "Faster, leaner
  implementation of putTime/getTime".

  [faster-session-2] With this commit.

Performance results:

  A) Testing with:
       httperf --hog --client=0/1 --server=localhost \
               --port=8080 --uri=/ --rate=1000 \
               --send-buffer=4096 --recv-buffer=16384 \
               --num-conns=100 --wsess=1000,60,1 \
               --burst-length=20 --session-cookie

     Results:
       vanilla-nosession: 19187.7 req/s (0.1 ms/req)
       vanilla-session:    2523.3 req/s (0.4 ms/req)
       faster-session-1:   2933.5 req/s (0.3 ms/req)
       faster-session-2:   2957.5 req/s (0.3 ms/req)

     This test benchmarks both saving and loading the session.
     Interestingly, this commit provides only a small performance
     increase.

  B) Testing with:
       httperf --hog --client=0/1 --server=localhost \
               --port=8080 --uri=/ --rate=1000 \
               --send-buffer=4096 --recv-buffer=16384 \
               --num-conns=100 --num-calls=1000 \
               --burst-length=20

     Results:
       vanilla-nosession: 43548.7 req/s (0.0 ms/req)
       vanilla-session:    3609.4 req/s (0.3 ms/req)
       faster-session-1:   3454.9 req/s (0.3 ms/req)
       faster-session-2:   3786.9 req/s (0.3 ms/req)

     This test benchmarks only saving the session.  Strangely,
     faster-session-1 was worse than vanilla-session (while
     isolated tests show that the new putTime should be +70x
     faster).  However, there is a non-negligible performance
     increase on faster-session-2.
2012-09-05 01:35:10 -03:00
..
Cache.hs Add (another) missing file 2011-11-30 18:37:25 +02:00
Core.hs Use a cache for session cookie's expiration time. 2012-09-05 01:35:10 -03:00
Request.hs Reflect wai changes for #262 2012-07-11 15:58:36 +03:00
Session.hs Use a cache for session cookie's expiration time. 2012-09-05 01:35:10 -03:00
TestApi.hs yesod-core compiles and passes all tests (that was easy) 2011-12-27 16:11:52 +02:00