core/state: avoid unnecessary alloc in trie prefetcher (#23198)

8fe47b0a · Marius van der Wijden · GitHub · 58b0420a · 8fe47b0a
Unverified Commit 8fe47b0a authored Jul 12, 2021 by Marius van der Wijden Committed by GitHub Jul 12, 2021
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trie_prefetcher.go core/state/trie_prefetcher.go +2 -3

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--- a/core/state/trie_prefetcher.go
+++ b/core/state/trie_prefetcher.go
@@ -312,12 +312,11 @@ func (sf *subfetcher) loop() {
 				default:
 					// No termination request yet, prefetch the next entry
-					taskid := string(task)
+					if _, ok := sf.seen[string(task)]; ok {
-					if _, ok := sf.seen[taskid]; ok {
 						sf.dups++
 					} else {
 						sf.trie.TryGet(task)
-						sf.seen[taskid] = struct{}{}
+						sf.seen[string(task)] = struct{}{}
 					}
 				}
 			}