function sub (depth) {
		utils.dlog('GC force ' + depth);
		if (depth > 0) {
			var arr = [];
			utils.dlog('Building...');
			for (var i = 0; i < 10; ++i) {
				arr.push(new Uint8Array(0x40000));
			}
			utils.dlog('Shifting...');
			while (arr.length > 0) {
				arr.shift();
			}
			sub(depth - 1);
		}
	}
Forces the garbage collector to run