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trie: cache collapsed tries node, not rlp blobs (#16876)

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The current trie memory database/cache that we do pruning on stores
trie nodes as binary rlp encoded blobs, and also stores the node
relationships/references for GC purposes. However, most of the trie
nodes (everything apart from a value node) is in essence just a
collection of references.

This PR switches out the RLP encoded trie blobs with the
collapsed-but-not-serialized trie nodes. This permits most of the
references to be recovered from within the node data structure,
avoiding the need to track them a second time (expensive memory wise).
This commit is contained in:
Péter Szilágyi
2018-06-21 12:28:05 +03:00
committed by Felix Lange
parent 8db8d074e2
commit d926bf2c7e
8 changed files with 268 additions and 75 deletions
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2
core/state/statedb.go
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@ -596,7 +596,7 @@ func (s *StateDB) Commit(deleteEmptyObjects bool) (root common.Hash, err error)
case isDirty:
// Write any contract code associated with the state object
if stateObject.code != nil && stateObject.dirtyCode {
s.db.TrieDB().Insert(common.BytesToHash(stateObject.CodeHash()), stateObject.code)
s.db.TrieDB().InsertBlob(common.BytesToHash(stateObject.CodeHash()), stateObject.code)
stateObject.dirtyCode = false
}
// Write any storage changes in the state object to its storage trie.