Intra-block cache

[benaadams]

Resolves #179

I'd solved this a long time ago; however always had issues doing the more ambitious step of sharing the cache between blocks; and parallel pre-caching.

Recognising the perfect can be the enemy of the good; and that we can make a journey with many steps; this introduces just the part of sharing state and storage between tx in the same block; rather than always starting afresh for each tx.

Changes

• Maintain state and storage cache between the txs in a block

Even though it clears every block in this iteration

• > 50% of state reads are cache hits
• ~ 21% of storage reads are cache hits

Types of changes

What types of changes does your code introduce?

• Optimization

Testing

Requires testing

• No

[benaadams]

Hive test pass https://github.com/NethermindEth/nethermind/actions/runs/9122197603