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Reduce locking time in recomputeFieldTrie (#9353)

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* Reduce locking time in `recomputeFieldTrie`

* add comment

* reuse variable and improve comment
This commit is contained in:
Radosław Kapka 2021-08-10 11:54:35 +02:00 committed by GitHub
parent a5998fab2f
commit 7a9c717ae0
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1 changed files with 5 additions and 2 deletions
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7
beacon-chain/state/v1/state_trie.go
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@ -509,13 +509,16 @@ func (b *BeaconState) rootSelector(ctx context.Context, field types.FieldIndex)
func (b *BeaconState) recomputeFieldTrie(index types.FieldIndex, elements interface{}) ([32]byte, error) {
fTrie := b.stateFieldLeaves[index]
// We can't lock the trie directly because the trie's variable gets reassigned,
// and therefore we would call Unlock() on a different object.
fTrieMutex := fTrie.RWMutex
if fTrie.FieldReference().Refs() > 1 {
fTrie.Lock()
defer fTrie.Unlock()
fTrieMutex.Lock()
fTrie.FieldReference().MinusRef()
newTrie := fTrie.CopyTrie()
b.stateFieldLeaves[index] = newTrie
fTrie = newTrie
fTrieMutex.Unlock()
}
// remove duplicate indexes
b.dirtyIndices[index] = sliceutil.SetUint64(b.dirtyIndices[index])