Tzvetan Mikov on X: "The perf impact of this is curious. Arguments are very cheap in JS, unlike objects. Using the wrong order will kill the hidden class. A lot of optimizations need to happen to eliminate the object allocation and the property access cost. The function better be hot and inlineable." / X

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Tzvetan Mikov
@tmikov
The perf impact of this is curious. Arguments are very cheap in JS, unlike objects. Using the wrong order will kill the hidden class. A lot of optimizations need to happen to eliminate the object allocation and the property access cost. The function better be hot and inlineable.
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Cory House
@housecor
Mar 1, 2024
Habit: If a function accepts two arguments of the same type, I accept an object. This protects from accidentally passing args in the wrong order.
// 🚩 Watch out - easy to pass args in wrong order function saveUser(name: string, email: string) { // code here } // 🐞 Bug: params in wrong order saveUser("c@example.com", "Cory") // ----------------------------------------------- // Accepts object instead function saveUser(user: User) { // code here } // ✅ Now I'm less likely to mess up the order. saveUser({ name: "Cory", email: "c@example.com" })
4:58 AM · Mar 2, 2024170.5KViews