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Programming

Submission + - Speeding up code with GCC's prefetch extension (mit.edu)

birge writes: "In memory-constrained loops where memory must be accessed out-of-order, a relatively little-used extension to GCC can be used to speed up code by as much as several times. Extremely simple to use, the __builtin_prefetch instruction tells the cache mechanism to load a memory location into local chip cache, allowing the programmer to have memory loaded for the next computation in parallel with the current computation."

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