Comment #17 on issue 2159 by RetroModular: Add support for rest parameters
https://code.google.com/p/v8/issues/detail?id=2159
I know this is still work-in-progress but are you guys aware of the
performance issues with the current implementation?
When used as varargs, calling a function that uses rest parameters is about
90 times slower than calling a function that accesses the arguments object.
function f2(a, b, c) {} // fast
function f1() {} // accessing arguments[n], fast
function f3(...values) {} // very slow
When used to expand an array, calling a function is about 1400 times slower
than explicitly passing arguments to the function.
foo(1, 2, 3); // fast
foo(numbers[0], numbers[1], numbers[2]); // fast
foo(...numbers); // extremely slow
Just a heads-up for you guys :)
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