In Google's V8 and Firefox's Spidermonkey there might be a few microsecond JIST compilation difference, but ultimately the result is the exact same. To prove this, let's examine the efficiency of JSPerf at microbenchmarks by comparing the speed of two blank code snippets. The JSPerf tests are found here. And, the jsben.ch testsare found here. As you can see, there is a noticable difference when there should be none. If you are really a performance freak like me, then it might be more worth your while trying to reduce the number of variables and functions in the scope and especially eliminating polymorphism (such as using the same variable to store two different types).

In Google's V8 and Firefox's Spidermonkey there might be a few microsecond JIT compilation difference, but ultimately the result is the exact same. To prove this, let's examine the efficiency of JSPerf at micro-benchmarks by comparing the speed of two blank code snippets. The JSPerf tests are found here. And, the jsben.ch tests are found here. As you can see, there is a noticeable difference when there should be none. If you are really a performance freak like me, then it might be more worth your while trying to reduce the number of variables and functions in the scope and especially eliminating polymorphism (such as using the same variable to store two different types).

The following does not work because the var add= superseeds the function add().

The following does not work because var add= begins an expression and causes the following function add() to be an expression instead of a block. Named functions are only visible to themselves and their surrounding block. As function add() is an expression here, it has no surrounding block, so it is only visible to itself.

There are four noteworthy comparisons between the two different declarations of functions as listed below.

What Is The "Nearest Block"

There are four noteworthy comparisons between the two different declarations of functions as listed below.

What Is The "Nearest Block"