Describe the issue

Restarting bitcoin, mempool starts filling from scratch.

Can you reliably reproduce the issue?

If so, please list the steps to reproduce below:

1. Wait for mempool to reach for example 3000 transactions
2. Restart bitcoin
3. Watch mempool filling slowly from scratch

Expected behaviour

Mempool would already contain ~3000 TX on startup

Actual behaviour

It starts at 0 and fills up slowly with a few per second.

Screenshots.

http://imgur.com/a/or82d

What version of bitcoin-core are you using?

Windows x64 0.14rc1 binary from https://bitcoin.org/bin/bitcoin-core-0.14.0/test.rc1/

Any extra information that might be useful in the debugging process.

I may not be aware of how the mempool.dat thing works and there could just be a misunderstanding.