September 2016
Intermediate to advanced
408 pages
9h 18m
English
Content preview from Haskell High Performance ProgrammingBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Compiler code optimizations
Haskell compilers perform aggressive optimization transformations on code. GHC optimization passes are highly sophisticated, so much that one rarely needs to worry about performance. We have seen some of the effects of ghc -O1 in our examples so far; in all cases,-O1increased performance relative to no optimizations, or -Onot, and in some optimizations passes were the difference between constant and exponential complexity.
Inlining and stream fusion
GHC performs aggressive inlining, which simply means rewriting a function call with the function's definition. Because all values in Haskell are referentially transparent, any function can be inlined within the scope of its definition. Especially in loops, inlining improves ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.