Processing Bank transaction from feed 8 second lag with over 600 transactions

SUGGESTED

Processing bank transaction from feed to match payment in for sales invoice has become extremely slow since I have 628 bank feed transactions in the file. Processing the early transactions is fine but when I page through to the end of the 628 transactions and try and select a bank item it takes up to 8 seconds to acknowledge the tick in the box. Has any one experienced this? I'm guessing I will just have to clear my backlog from the beginning of the file as the lag seems to be because of the size of the bank feed file.