What performance consideration does this code demonstrate?
// Before
const obj = {
name: 'John',
age: 30,
// ...
};
delete obj.age;
// After
let obj = {
name: 'John',
// ...
};
obj = null; // when done
This demonstrates hidden class optimization maintenance: 1) Avoiding delete operator preserves object shape, 2) delete operations can deoptimize objects by changing their hidden class, 3) Better to create objects with their final shape initially, 4) Proper cleanup by setting to null when done, 5) Maintains V8's internal optimizations, 6) Helps JavaScript engine optimize property access, 7) Important for objects that are accessed frequently, 8) Critical for maintaining consistent performance.