JSTests/microbenchmarks/get-by-id-bimorphic-check-structure-elimination.js

(function() {
    var o = {a:1, b:2, c:3, d:4, e:5, f:6, g:7, h:8, i:9, j:10, k:11};
    var p = {a:2, b:3, c:4, d:5, e:6, f:7, g:8, h:9, i:10, j:11, k:12, l:13};
    var result = 0;
    for (var i = 0; i < 1000000; ++i) {
        result += o.a ^ o.b ^ o.c ^ o.d ^ o.e ^ o.f ^ o.g ^ o.h ^ o.i ^ o.j ^ o.k;
        var tmp = o;
        o = p;
        p = tmp;
    }
    if (result != 6500000)
        throw "Error: bad result: " + result;
})();