The benchmark you're looking at compares two different approaches to accessing a value in a JavaScript object: the first method uses a getter with a closure, and the second uses a direct method call.

Approaches Tested

1. Using a Getter with Closure (Old Approach):

   • Code:

     const company1 = {
         get ab() {
             return (key) => {
                 return obj[key];
             }
         }
     };
     const api1 = {
         get ab() {
             return company1.ab;
         }
     };
     

   • Method: This approach defines a getter, ab, on company1. When accessed, it returns a function that takes a key and retrieves a value from obj. The getter in api1 simply returns the ab from company1.

2. Using a Regular Function (New Approach):

   • Code:

     const company2 = {
         ab(key) {
             return obj[key];
         }
     };
     const api2 = {
         ab: company2.ab,
     };
     

   • Method: This approach defines a method, ab, directly on company2 which takes a key and returns the corresponding value from obj.

Comparison & Performance

• Execution Speed:
  • The test results indicate that the new approach (api2.ab('a')) has a significantly higher execution speed, with 149,022,752 executions per second compared to 38,068,040 executions per second for the old approach. This suggests that using a direct method call is more efficient than using a getter that returns a closure.

Pros and Cons

1. Getter with Closure (Old Approach):

   • Pros:
     • Provides a level of abstraction, as users can interact with it as if it were a property.
     • Closures allow maintaining a private state.
   • Cons:
     • Generally slower due to the additional function call overhead.
     • Increased complexity in understanding the code flow.

2. Regular Function (New Approach):

   • Pros:
     • Faster execution as it eliminates the overhead of closures.
     • Simpler and more straightforward code, easier to maintain.
   • Cons:
     • May have less intuitive property-like access, depending on the context of use.

Other Considerations

• Use Case Sensitivity: The choice between using getters or regular functions can depend on specific use cases. If you want to maintain state or encapsulate behavior, getters with closures can be beneficial. However, for performance-critical applications or scenarios where you simply need to access data, regular functions are preferable.

• Memory Consumption: The closure approach could lead to higher memory consumption because every time the getter is called, a new function is created. This could be a concern in environments where performance and memory efficiency are critical.

Alternatives

• There are other methods to access object properties, such as using simple object destructuring or direct property access.
• You could also consider libraries or tools like Lodash, which offer a variety of utility functions to work with objects, providing both simple access and powerful manipulation. However, when it comes to pure performance, the simplest approach (like the method used in the "new" test) will generally outperform the use of such libraries for simple access patterns.

In conclusion, when deciding between these approaches, consider the specific needs of your application: readability, maintainability, and performance. For straightforward data access, a direct method (like in the new approach) is usually the best choice.