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Creators/Authors contains: "Nuessle, Carl"

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  1. ; ; ; (, SIGMOD '21: International Conference on Management of Data)
    null (Ed.)
    A compiler’s optimizer operates over abstract syntax trees (ASTs), continuously applying rewrite rules to replace sub- trees of the AST with more efficient ones. Especially on large source repositories, even simply finding opportunities for a rewrite can be expensive, as optimizer traverses the AST naively. In this paper, we leverage the need to repeatedly find rewrites, and explore options for making the search faster through indexing and incremental view maintenance (IVM). Concretely, we consider bolt-on approaches that make use of embedded IVM systems like DBToaster, as well as two new approaches: Label-indexing and TreeToaster, an AST- specialized form of IVM. We integrate these approaches into an existing just-in-time data structure compiler and show experimentally that TreeToaster can significantly improve performance with minimal memory overheads. 
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