c2ed9de7fb
* Flip default parameter template YMMV, I saved ~10b on a 2kb library. Not noticeable at the small scale, by why not do it anyway? I've (unscientifically) found that flipping the default parameter conditional yields better gzip results. I think this is due to the slightly longer string it can now repeatedly match: ```js // old var param = arguments.length <= 0 || void 0 === arguments[0] ? null : arguments[0] --------------------------------------------------------------^ // new var param = arguments.length > 1 && void 0 !== arguments[1] ? arguments[1] : null ------------------------------------------------------------------------^ ``` Though it's entirely likely gzip will also choose up to the index of the arguments if you many default parameters at different indexes. * Update tests
28 lines
800 B
JavaScript
28 lines
800 B
JavaScript
var f0 = function (a) {
|
|
var b = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : a;
|
|
var c = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : b;
|
|
|
|
return [a, b, c];
|
|
};
|
|
|
|
assert.deepEqual(f0(1), [1, 1, 1]);
|
|
|
|
var f1 = function (_ref) {
|
|
var a = _ref.a;
|
|
var b = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : a;
|
|
var c = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : b;
|
|
|
|
return [a, b, c];
|
|
};
|
|
|
|
assert.deepEqual(f1({ a: 1 }), [1, 1, 1]);
|
|
|
|
var f2 = function (_ref2) {
|
|
var a = _ref2.a;
|
|
var b = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : a;
|
|
var c = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : a;
|
|
|
|
return [a, b, c];
|
|
};
|
|
|
|
assert.deepEqual(f2({ a: 1 }), [1, 1, 1]); |