Bitcoin Core 0.12.0 Released! 7x Faster Signature Validation
Ability to Limit Upload Traffic
Crash Prevention via Memory Pool Limits
Option to Send Transactions That Can Be Fee-Boosted
Improved Rules for Transaction Relaying
Automatic Usage of Tor When it’s Running
Ability for Apps to Subscribe to Notifications With ZeroMQ
Massively Reduced Disk Usage for Wallets
Much Faster Block Assembly for Miners
https://bitcoincore.org/en/2016/02/23/release-0.12.0/