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copied!<p>That's a big topic! Most has been explained elsewhere, so I won't try to write a book chapter right here. Instead:</p> <ul> <li>Real World Haskell, ch 25, "<a href="http://book.realworldhaskell.org/read/profiling-and-optimization.html" rel="nofollow noreferrer">Performance</a>" - discusses profiling, simple specialization and unpacking, reading Core, and some optimizations.</li> </ul> <p>Johan Tibell is writing a lot on this topic:</p> <ul> <li><a href="http://blog.johantibell.com/2011/06/computing-size-of-hashmap.html" rel="nofollow noreferrer">Computing the size of a data structure</a></li> <li><a href="http://blog.johantibell.com/2011/06/memory-footprints-of-some-common-data.html" rel="nofollow noreferrer">Memory footprints of common data types</a></li> <li><a href="http://blog.johantibell.com/2011/03/video-of-my-hashing-based-containers.html" rel="nofollow noreferrer">Faster persistent structures through hashing</a></li> <li><a href="http://blog.johantibell.com/2011/02/slides-from-my-talk-on-reasoning-about.html" rel="nofollow noreferrer">Reasoning about laziness</a></li> </ul> <p>And some things from here:</p> <ul> <li><a href="https://stackoverflow.com/questions/6121146/reading-ghc-core/6121495#6121495">Reading GHC Core</a></li> <li><a href="https://stackoverflow.com/questions/6048194/good-introductory-text-about-ghc-implementation/6048706#6048706">How GHC does optimization</a></li> <li><a href="https://stackoverflow.com/questions/3276240/tools-for-analyzing-performance-of-a-haskell-program/3276557#3276557">Profiling for performance</a></li> <li><a href="https://stackoverflow.com/questions/4626884/improving-treap-implementation/5690580#5690580">Tweaking GC settings</a></li> <li><a href="https://stackoverflow.com/questions/5707250/optimizing-numerical-array-performance-in-haskell/5707388#5707388">General improvements</a></li> <li><a href="https://stackoverflow.com/questions/3115540/haskell-math-performance-on-multiply-add-operation/3134481#3134481">More on unpacking</a></li> <li><a href="https://stackoverflow.com/questions/3131554/what-is-the-relationship-between-unboxed-types-and-strictness/3134654#3134654">Unboxing and strictness</a></li> </ul> <p>And some other things:</p> <ul> <li><a href="http://donsbot.wordpress.com/2009/10/11/self-optimizing-data-structures-using-types-to-make-lists-faster/" rel="nofollow noreferrer">Intro to specialization of code and data</a></li> <li><a href="http://www.haskell.org/ghc/docs/latest/html/users_guide/options-optimise.html#id455084" rel="nofollow noreferrer">Code improvement flags</a></li> </ul>

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