Fix wasted iterations when getting previous state

2019-09-23 22:22:19 +10:00 · 2019-09-23 22:22:19 +10:00 · 4fccec158a
commit 4fccec158a
parent e7a580393c
1 changed files with 2 additions and 1 deletions
--- a/beacon_node/beacon_chain/src/beacon_chain.rs
+++ b/beacon_node/beacon_chain/src/beacon_chain.rs
@ -393,7 +393,8 @@ impl<T: BeaconChainTypes> BeaconChain<T> {
        } else {
            let state_root = self
                .rev_iter_state_roots()
-                .find(|(_root, s)| *s == slot)
+                .take_while(|(_root, current_slot)| *current_slot >= slot)
+                .find(|(_root, current_slot)| *current_slot == slot)
                .map(|(root, _slot)| root)
                .ok_or_else(|| Error::NoStateForSlot(slot))?;