The power of JS macros

after.js

function wat (
	outputBuffer, outputOffset, outputStride,
	inputBuffer, inputOffset, inputStride,
	a, b, c, d
) {
	var o, i, s
	
	i = (inputOffset) || 0

	inputStride = inputStride || 1

	o = (outputOffset) || 0

	outputStride = outputStride || 1

	var _a = typeof a === "number"

	var _b = typeof b === "number"

	var _c = typeof c === "number"

	var _d = typeof d === "number"

	if (!_a && !_b && !_c && !_d) for (; i<(inputBuffer).length; outputBuffer[o] = (Math.random() * s * inputBuffer[i]), i+=inputStride, o+=outputStride) {
		s = 1 * a[i] * b[i] * c[i] * d[i]
	}

	if (_a && !_b && !_c && !_d) for (; i<(inputBuffer).length; outputBuffer[o] = (Math.random() * s * inputBuffer[i]), i+=inputStride, o+=outputStride) {
		s = 1 * a * b[i] * c[i] * d[i]
	}

	if (!_a && _b && !_c && !_d) for (; i<(inputBuffer).length; outputBuffer[o] = (Math.random() * s * inputBuffer[i]), i+=inputStride, o+=outputStride) {
		s = 1 * a[i] * b * c[i] * d[i]
	}

	if (_a && _b && !_c && !_d) for (; i<(inputBuffer).length; outputBuffer[o] = (Math.random() * s * inputBuffer[i]), i+=inputStride, o+=outputStride) {
		s = 1 * a * b * c[i] * d[i]
	}

	if (!_a && !_b && _c && !_d) for (; i<(inputBuffer).length; outputBuffer[o] = (Math.random() * s * inputBuffer[i]), i+=inputStride, o+=outputStride) {
		s = 1 * a[i] * b[i] * c * d[i]
	}

	if (_a && !_b && _c && !_d) for (; i<(inputBuffer).length; outputBuffer[o] = (Math.random() * s * inputBuffer[i]), i+=inputStride, o+=outputStride) {
		s = 1 * a * b[i] * c * d[i]
	}

	if (!_a && _b && _c && !_d) for (; i<(inputBuffer).length; outputBuffer[o] = (Math.random() * s * inputBuffer[i]), i+=inputStride, o+=outputStride) {
		s = 1 * a[i] * b * c * d[i]
	}

	if (_a && _b && _c && !_d) for (; i<(inputBuffer).length; outputBuffer[o] = (Math.random() * s * inputBuffer[i]), i+=inputStride, o+=outputStride) {
		s = 1 * a * b * c * d[i]
	}

	if (!_a && !_b && !_c && _d) for (; i<(inputBuffer).length; outputBuffer[o] = (Math.random() * s * inputBuffer[i]), i+=inputStride, o+=outputStride) {
		s = 1 * a[i] * b[i] * c[i] * d
	}

	if (_a && !_b && !_c && _d) for (; i<(inputBuffer).length; outputBuffer[o] = (Math.random() * s * inputBuffer[i]), i+=inputStride, o+=outputStride) {
		s = 1 * a * b[i] * c[i] * d
	}

	if (!_a && _b && !_c && _d) for (; i<(inputBuffer).length; outputBuffer[o] = (Math.random() * s * inputBuffer[i]), i+=inputStride, o+=outputStride) {
		s = 1 * a[i] * b * c[i] * d
	}

	if (_a && _b && !_c && _d) for (; i<(inputBuffer).length; outputBuffer[o] = (Math.random() * s * inputBuffer[i]), i+=inputStride, o+=outputStride) {
		s = 1 * a * b * c[i] * d
	}

	if (!_a && !_b && _c && _d) for (; i<(inputBuffer).length; outputBuffer[o] = (Math.random() * s * inputBuffer[i]), i+=inputStride, o+=outputStride) {
		s = 1 * a[i] * b[i] * c * d
	}

	if (_a && !_b && _c && _d) for (; i<(inputBuffer).length; outputBuffer[o] = (Math.random() * s * inputBuffer[i]), i+=inputStride, o+=outputStride) {
		s = 1 * a * b[i] * c * d
	}

	if (!_a && _b && _c && _d) for (; i<(inputBuffer).length; outputBuffer[o] = (Math.random() * s * inputBuffer[i]), i+=inputStride, o+=outputStride) {
		s = 1 * a[i] * b * c * d
	}

	if (_a && _b && _c && _d) for (; i<(inputBuffer).length; outputBuffer[o] = (Math.random() * s * inputBuffer[i]), i+=inputStride, o+=outputStride) {
		s = 1 * a * b * c * d
	}

}

before.js

function wat (
	outputBuffer, outputOffset, outputStride,
	inputBuffer, inputOffset, inputStride,
	a, b, c, d
) {
	var o, i, s
	process (Math.random() * s * inputBuffer[i],
		o, outputBuffer, outputOffset, outputStride,
		i, inputBuffer, inputOffset, inputStride,
		a, b, c, d
	) {
		s = 1 * a * b * c * d
	}
}