* Produce less garbage in GetState
* Still playing with mem allocation in GetCommittedState
* Pass key by pointer in GetState as well
* linter
* Avoid a memory allocation in opSload
* Use uint256.Int rather than common.Hash for storage values to reduce memory allocation in opSload & opSstore
* linter
* linters
* small clean up
* introduce PlainStateReader with fallbacks
* no 10.000 changes in tests
* even less iterations
* remove even more iterations
* add `go run ./cmd/geth --syncmode staged --plainstate` flag
* fix serialization calls
* make a more sensible file default
doesn’t affect anything, because this flag is always overriden when parsing CLI. but still.