JSTests/microbenchmarks/string-on-string.js

function shouldBe(actual, expected) {
    if (actual !== expected)
        throw new Error('bad value: ' + actual);
}

function test(string) {
    return String(string);
}
noInline(test);

for (var i = 0; i < 1e5; ++i) {
    shouldBe(test("-0"), "-0");
    shouldBe(test("240"), "240");
    shouldBe(test("-1"), "-1");
}