Loop Fission and Fusion
Loop fission and fusion are compiler optimizations that modify loops to improve performance. Loop fission splits a single loop into multiple loops over the same range to enhance locality of reference, especially on multi-core processors. Loop fusion combines multiple loops into one to reduce overhead and avoid temporary allocations, which can significantly boost performance in numerical computing.
- ▪Loop fission breaks a loop into smaller loops over the same index range, each handling part of the original body.
- ▪Loop fusion merges multiple loops into a single loop, potentially reducing loop control overhead and avoiding temporary memory allocations.
- ▪Loop fusion can improve performance in languages like Julia by eliminating intermediate arrays in elementwise operations.
- ▪The effectiveness of loop fusion depends on data locality, instruction-level parallelism, and the presence of data dependencies between loops.
- ▪Loop fission is particularly beneficial in multi-core environments where tasks can be distributed across processors.
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Toggle the table of contents Loop fission and fusion 3 languages فارسی日本語Русский Edit links ArticleTalk English ReadEditView history Tools Tools move to sidebar hide Actions General What links hereRelated changesUpload filePermanent linkPage informationCite this pageGet shortened URL Print/export Download as PDFPrintable version In other projects Wikidata item Appearance move to sidebar hide From Wikipedia, the free encyclopedia Compiler optimization Loop fission (or loop distribution) is a compiler optimization in which a loop is broken into multiple loops over the same index range with each taking only a part of the original loop's body.[1][2] The goal is to break down a large loop body into smaller ones to achieve better utilization of locality of reference.
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