将效果处理程序改装到OCaml上

K. Sivaramakrishnan, Stephen Dolan, Leo White, T. Kelly, S. Jaffer, Anil Madhavapeddy
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引用次数: 28

摘要

作为一种带有用户定义效果的模块化编程机制,效果处理程序的势头越来越大。效果处理程序允许非本地控制流机制(如生成器、async/await、轻量级线程和协程)以可组合的方式表达。我们为OCaml(一种工业强度的多范式编程语言)设计并评估了一个完整有效的效果处理程序实现。我们的实现努力保持现有OCaml代码的向后兼容性和性能配置文件。将效果处理程序改装到OCaml上是具有挑战性的,因为OCaml目前除了异常之外没有任何非本地控制流机制。我们对OCaml的效果处理程序的实现:(i)在不使用效果处理程序的综合宏基准套件上强加了平均1%的开销;(ii)与检查堆栈的程序分析工具保持兼容;并且(iii)对于使用效果处理程序的新代码是有效的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Retrofitting effect handlers onto OCaml
Effect handlers have been gathering momentum as a mechanism for modular programming with user-defined effects. Effect handlers allow for non-local control flow mechanisms such as generators, async/await, lightweight threads and coroutines to be composably expressed. We present a design and evaluate a full-fledged efficient implementation of effect handlers for OCaml, an industrial-strength multi-paradigm programming language. Our implementation strives to maintain the backwards compatibility and performance profile of existing OCaml code. Retrofitting effect handlers onto OCaml is challenging since OCaml does not currently have any non-local control flow mechanisms other than exceptions. Our implementation of effect handlers for OCaml: (i) imposes a mean 1% overhead on a comprehensive macro benchmark suite that does not use effect handlers; (ii) remains compatible with program analysis tools that inspect the stack; and (iii) is efficient for new code that makes use of effect handlers.
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