function foo(arg) { return [...arg]; } noInline(foo); let arrays = [ ]; const size = 500; { let arr = []; for (let i = 0; i < size; i++) { arr.push(i); } arrays.push(arr); } { let arr = []; for (let i = 0; i < size; i++) { arr.push(i + 0.5); } arrays.push(arr); } { let arr = []; for (let i = 0; i < size; i++) { arr.push({i: i}); } arrays.push(arr); } let start = Date.now(); for (let i = 0; i < 100000; i++) { let array = arrays[i % arrays.length]; foo(array); } const verbose = false; if (verbose) print(Date.now() - start);