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`new function()` with lower case "f" in JavaScript
My intuition says using the new keyword would be slower. Is there any noticeable benefit to using either method?
My guess would be that the function constructor form (
new function() { }) would be faster than returning an object literal in a closure ((function(){ return {}; })()) because the latter seems to be doing a little more work than the former.However, it appears I am wrong, at least for a couple modern JavaScript engines. This jsPerf comparison shows the literal/closure form to be considerably faster in both Chrome and Firefox.
Ultimately, I think the correctness of the code and the clarity of the intent of the programmer is more important than such a trivial optimization (which likely varies greatly between real-world JavaScript engines anyway).