在这种特定情况下，if-else 是否比 try-catch 更好，性能方面？ 哪种方式是最佳实践？

Question

I've a json, I need to check a few values and perform a certain task, say this is my json,

s = {
    "d": {
      "f": {
        "g": 1
      }
    }
  }

and the keys d,f and g might or might not be present, and if g == 1, I need to perform a certain task. So, which of the following gives me better performance.

if-else way of doing this

if(s.d && s.d.f && s.d.f.g && s.d.f.g ==1)
{
    doSomeJob();
}
else
{
    doSomeOtherJob();
}

try-catch way of doing this

try{
if(s.d.f.g ==1)
{
    doSomeJob();
}
}catch(e){
    doSomeOtherJob();
}

Answer 1

The thing with try-catch . Is that it always attempts to get through the code inside the try , and if that doesn't work, it has to reroll everything inside the try back to the start of the try .
Only after rerolling, it'll enter the catch . This makes using a try-catch much slower.
If there is instead a condition (like an if-else statement) at the start. And the statement is false, then it doesn't have to go through the if , or the rest of the if-statement at all.

That's where it's more useful to use an if-else statement, and why you rather want the try-catch to be as short as needed.