Function setMeta

test/fixtures/compile-performance.js:8101–8106

(it)

            return isExtensible(Object.preventExtensions({}));
        });
        var setMeta = function(it){
            setDesc(it, META, {value: {
                i: 'O' + ++id, // object ID
                w: {}          // weak collections IDs
            }});
        };
        var fastKey = function(it, create){
            // return primitive with prefix
            if(!isObject(it))return typeof it == 'symbol' ? it : (typeof it == 'string' ? 'S' : 'P') + it;