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Tor provides anonymity by building circuits with three relays. So instead of connecting directly to the destination server, a connection is made between each relay of the circuit and this takes more time.
The Tor relays are run by volunteers in a decentralized way. So all relays are not of the same quality. Some are big and fast, while some others are smaller and slower. As a whole, the network could be faster if it had more capacity. To improve the capacity of the Tor network, you can either run a Tor relay yourself or [help existing relays](https://www.torservers.net/partners.html).
Misuse of the Tor network
Some people misuse the Tor network, sometimes on purpose or sometimes by
lack of knowledge. For instance, Tor is sometimes used to conduct
[[!wikipedia Ddos#Distributed_attack desc="DDoS attacks"]]. By
doing this, the Tor relays are the ones who actually suffer from the
attack, instead of the intended target. Some people use [[!wikipedia
Peer_to_peer desc="peer-to-peer software"]] through Tor which
is bad for the network.