2021-02-17
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#vanilla javascript
Matthew Swensen
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Feb 17, 2021 ⋅ 5 min read

How polymorphic JavaScript functions affect performance

Matthew Swensen Principal software engineer and open source enthusiast.

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One Reply to "How polymorphic JavaScript functions affect performance"

  1. The overloading of a function is only one type of polymorphism. Javascript does not support overloading. One this function breaks SOLID principles on so many different levels. Two this function should never have made it past code review. Polymorphism is a good thing. It allows robust, reusable and maintainable code. You cannot write bad code much less in one example to discredit an entire paradigm. Good writing, but monomorphic functions are not the future. By creating a one to one mapping between types and return statements we eliminate robustness in the code base and increase the amount of code we have to write. Without polymorphism we don’t have templates, or generics. Code becomes static. Hence useless beyond the current use case.

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