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Haskell Performance Resource

Data Types - Functions
Overloading - FFI - Arrays
Strings - Integers - I/O
Floating point - Concurrency
Modules - Monads

Strictness - Laziness
Avoiding space leaks
Accumulating parameter

GHC - nhc98 - Hugs
Yhc - JHC

Force functions to be inlined

Haskell has an INLINE pragma that can be used to indicate to the compiler that you would like a function's definition to be inlined at each call site. (not all compilers respect the INLINE pragma; GHC does, any others?)