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Avoid cloning clean stuff (#2173)

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This commit is contained in:
Tomasz Drwięga 2016-09-20 17:10:26 +02:00 committed by Arkadiy Paronyan
parent 33084aaa07
commit 52a69d19e6
1 changed files with 18 additions and 1 deletions
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19
ethcore/src/state.rs
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@ -410,10 +410,27 @@ impl fmt::Debug for State {
impl Clone for State { impl Clone for State {
fn clone(&self) -> State { fn clone(&self) -> State {
let cache = {
let mut cache = HashMap::new();
for (key, val) in self.cache.borrow().iter() {
let key = key.clone();
match *val {
Some(ref acc) if acc.is_dirty() => {
cache.insert(key, Some(acc.clone()));
},
None => {
cache.insert(key, None);
},
_ => {},
}
}
cache
};
State { State {
db: self.db.boxed_clone(), db: self.db.boxed_clone(),
root: self.root.clone(), root: self.root.clone(),
cache: RefCell::new(self.cache.borrow().clone()), cache: RefCell::new(cache),
snapshots: RefCell::new(self.snapshots.borrow().clone()), snapshots: RefCell::new(self.snapshots.borrow().clone()),
account_start_nonce: self.account_start_nonce.clone(), account_start_nonce: self.account_start_nonce.clone(),
trie_factory: self.trie_factory.clone(), trie_factory: self.trie_factory.clone(),