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Efficiency of let/and
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Date: | 2005-09-27 (15:22) |
From: | Stefan Monnier <monnier@i...> |
Subject: | Re: [Caml-list] Re: Ant: Efficiency of let/and |
>> If someone tries to use such things as `and' or >> unspecified-argument-evaluation-order in the hopes that the compiler will >> extract some imagined parallelism is simply deluding himself. >> In some cases, the freedom to execute in any order does lead to better >> code, but that code rarely if ever uses any kind of parallelism. > This is not so at all. Limited Parallelism is indeed found in all > modern processors, which can, for example, distribute multiple > instructions on several pipelines, decode in parallel with > computing values, or perform several integer and/or floating > operations simultaneously. This has nothing to do with what I said. Compilers can equally take advantage of ILP with a `let' or with a specified evaluation order. Stefan