Problem:
I've recently experienced serious performance issues with peercoind on my testnet faucet.

Reading the debug.log, I found thousands of entries like this:

2019-11-17 10:32:23 minting updateWallet 2449c930b86a6f82e582d4b9e429e5677c1519a1fb3f52184833254c49dc6119 0
2019-11-17 10:32:23    inWallet=1 inModel=0 Index=342-342 showTransaction=1 derivedStatus=0

While this cycle is running, the application will not respond to ^C or SIGHUP for minutes, sometimes not at all.

Behavior: System eventually runs out of memory.

Troubleshooting:
I tried salvaging the wallet and re-syncing from scratch. It did not help.

Application: peercoind, peercoin-qt 0.8.4

Debug.log:
https://peercoinexplorer.net/debug/debug.log (~100 mb)