pb.run(function(updater) {
var bit, byte;
var cstream = [];
for (var i = 0; i < readCount; i++) {
bit = bits.readBits(1, false);
cstream.push(bit);
byte = findInTree(tree, cstream);
if (byte !== null) {
data.uwrite(byte);
cstream = [];
}
if (i % 1000 === 0) {
updater();
}
}
});