setJitCompilerOption("ic.force-megamorphic", 1); function objectWithHops(hops) { var o = Object.create(null); o.hops = hops; for (var i = 0; i < hops; i++) { o = Object.create(o); } return o; } function test() { var objs = []; for (var i = 0; i < 32; i++) { objs.push(objectWithHops(230 + i)); } for (var i = 0; i < 130; i++) { var o = objs[i % objs.length]; assertEq(o.hops, 230 + (i % objs.length)); assertEq("hops" in o, true); assertEq(Object.hasOwnProperty.call(o, "hops"), false); assertEq(o.missing, undefined); assertEq("missing" in o, false); assertEq(Object.hasOwnProperty.call(o, "missing"), false); } } for (var i = 0; i < 10; i++) { test(); }