The comparison between utilizing an anonymous function in a loop and a named function

When running a function with a callback in a loop, I am debating between using an anonymous function or a named function. Take a look at the code snippets below:

Anonymous function

for(let i=0;i<50;i++){
example_func(param1,param2,()=>{

});
}

Named function

for(let i=0;i<50;i++){
example_func(param1,param2,callback);
}

function callback(){
    
}

Which approach is preferable? Will using a named function result in better performance compared to an anonymous function, or does it not make much of a difference?

Answer №1

It is said that having a named function declared outside of a loop could result in slightly better performance, as it only needs to be created once. Conversely, placing an anonymous or named function inside each iteration of the loop will lead to the function being recreated every time the loop runs.

Nevertheless, with the advancements in modern computers and JS environments, the impact on performance is likely to be negligible unless the loop is executing an exorbitant number of iterations. The focus should instead be on writing clean and easily understandable code, irrespective of style preferences.

If at some point you notice a particular operation running slower than expected, it may be worth delving into debugging to identify potential bottlenecks - although this section is unlikely to be the root cause.

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