Bitcoin-QT: Very long startup and at first launch needs to download the entire blockchain

Multibit: Starts up in a few seconds and downloads for only a few seconds

Why is Bitcoin-QT so slow?

1 Answer 1


Bitcoin-QT is slower than Multibit because Bitcoin-QT is a thick client(it downloads the entire blockchain,) whereas Multibit is a thin client(it does not download the full blockchain.)

  • Are there benefits of a thick client?
    – jobukkit
    Jun 11, 2013 at 17:38
  • 4
    Thin clients do not validate transactions, they just assume that the longest blockchain only has valid transactions. Furthermore, thin clients do not help the network. Instead, they rely on full nodes (like Bitcoin-Qt) to do the heavy lifting. Jun 11, 2013 at 20:22
  • If multibit doesn't download the full blockchain, how does it learn about transactions in blocks it hasn't seen? Aug 5, 2013 at 20:22
  • It doesn't; it only learns about transactions in blocks made since it was first started(unless you import an older address, in which case it downloads the entire blockchain.)
    – DrAwesome
    Sep 19, 2013 at 20:24

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.