How to avoid Javascript Garbage Collection when making function returns

Question

Am I right in thinking that,

1. With each call, test() exports another new object that must be garbage collected later.

   var sumValue=test(0,3);
   
   function test(startingValue,n){
       return({sum:startingValue+n});
   }
   

2. This version of test() requires no garbage collection later.

   var sumValue={sum:0};
   test(sumValue,3);
   
   function test(output,n){
       output.sum+=n;
   }
   

Answer 1

1. Yes, on each call it will create a new object.
2. Yes, since you're just mutating the existing object.

For this specific case, I wouldn't worry about it. It's too small to make an impact (unless this code is being run multiple times for extended periods).