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trie: polishes to trie committer (#21351)

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* trie: update tests to check commit integrity

* trie: polish committer

* trie: fix typo

* trie: remove hasvalue notion

According to the benchmarks, type assertion between the pointer and
interface is extremely fast.

BenchmarkIntmethod-12           1000000000               1.91 ns/op
BenchmarkInterface-12           1000000000               2.13 ns/op
BenchmarkTypeSwitch-12          1000000000               1.81 ns/op
BenchmarkTypeAssertion-12       2000000000               1.78 ns/op

So the overhead for asserting whether the shortnode has "valuenode"
child is super tiny. No necessary to have another field.

* trie: linter nitpicks

Co-authored-by: Martin Holst Swende <martin@swende.se>
This commit is contained in:
gary rong
2020-09-30 19:45:56 +08:00
committed by GitHub
parent dad26582b6
commit 053ed9cc84
4 changed files with 196 additions and 65 deletions
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5
trie/trie.go
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@ -505,13 +505,16 @@ func (t *Trie) Commit(onleaf LeafCallback) (root common.Hash, err error) {
if t.root == nil {
return emptyRoot, nil
}
// Derive the hash for all dirty nodes first. We hold the assumption
// in the following procedure that all nodes are hashed.
rootHash := t.Hash()
h := newCommitter()
defer returnCommitterToPool(h)
// Do a quick check if we really need to commit, before we spin
// up goroutines. This can happen e.g. if we load a trie for reading storage
// values, but don't write to it.
if !h.commitNeeded(t.root) {
if _, dirty := t.root.cache(); !dirty {
return rootHash, nil
}
var wg sync.WaitGroup