typed-array-construct-from-array.html

<!DOCTYPE html>
<body>
<script src="../resources/runner.js"></script>
<script>

var length = 1000000;
var source = new Array(length);
for (var i = 0; i < length; i++)
    source[i] = i;

PerfTestRunner.measureRunsPerSecond({
    description: "Measures performance of creating a Uint8Array from an existing one million element Array which contains integers beyond the range of an unsigned 8-bit integer.",
    run: function() {
        var target = new Uint8Array(source);
    }
});
</script>
</body>

chromium/third_party/blink/perf_tests/bindings/typed-array-construct-from-array.html