If I have a function with the signature below:
function test(variable1, variable2) {}
And I call it with only one parameter:
test(5);
Then within the test function, variable2 will be created but with a value of undefined. I'm interested to know if the JavaScript engine still allocates 32 bits in memory for that variable?
The size of undefined is elusive and likely varies depending on the engine being used. My educated guess is that in the optimal scenario, it would be 32 bits. When a variable is considered as undefined, it still requires a value to determine its status. This value is probably a pointer, which typically measures either 32 or 64 bits.
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