The answer
Yes, a small one. Each curried call creates a new closure. In hot code paths, this can add up. For most applications, the overhead is negligible. Avoid currying in performance-critical inner loops.
Currying Use Cases and Best Practices
Does currying have a performance overhead in JavaScript?
More FAQs in Currying Use Cases and Best Practices
For partial application (preset configuration), function composition (pipe with filter/map/reduce), event handlers (preset action), and logging (preset level). Use when you need reusable, configurable functions.
For simple functions with 2-3 arguments (currying adds unnecessary complexity), when readability suffers, in performance-critical code (closures have overhead), and when the team is not familiar with functional programming.
Most specific first, least specific last. Configuration first, data last. For example: curry((baseUrl, endpoint, params) => ...) so you can preset baseUrl and endpoint, then pass params at call time.
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