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Add trie caching for misses

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This commit is contained in:
Nick Johnson 2016-09-23 07:01:48 +08:00
parent 7c12e8ea44
commit c7c2e8e990
1 changed files with 10 additions and 9 deletions
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19
trie/trie.go
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@ -410,11 +410,16 @@ func (t *Trie) resolve(n node, prefix, suffix []byte) (node, error) {
}
func (t *Trie) resolveHash(n hashNode, prefix, suffix []byte) (node, error) {
if v, ok := globalCache.Get(n); ok {
return v, nil
var v node = nil
var ok bool
if v, ok = globalCache.Get(n); !ok {
enc, err := t.db.Get(n)
if err == nil && enc != nil {
v = mustDecodeNode(n, enc)
}
globalCache.Put(n, v)
}
enc, err := t.db.Get(n)
if err != nil || enc == nil {
if v == nil {
return nil, &MissingNodeError{
RootHash: t.originalRoot,
NodeHash: common.BytesToHash(n),
@ -423,11 +428,7 @@ func (t *Trie) resolveHash(n hashNode, prefix, suffix []byte) (node, error) {
SuffixLen: len(suffix),
}
}
dec := mustDecodeNode(n, enc)
if dec != nil {
globalCache.Put(n, dec)
}
return dec, nil
return v, nil
}
// Root returns the root hash of the trie.