From 4e04dbe434cd161d937cf534c3e407cfc32dc89f Mon Sep 17 00:00:00 2001
From: zhangsoledad <787953403@qq.com>
Date: Sat, 23 Oct 2021 11:57:17 +0800
Subject: [PATCH] perf: remove needless collect

---
 verification/contextual/src/contextual_block_verifier.rs | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/verification/contextual/src/contextual_block_verifier.rs b/verification/contextual/src/contextual_block_verifier.rs
index 1b112e9e04..3441ca4df7 100644
--- a/verification/contextual/src/contextual_block_verifier.rs
+++ b/verification/contextual/src/contextual_block_verifier.rs
@@ -182,9 +182,7 @@ impl<'a, CS: ChainStore<'a>> TwoPhaseCommitVerifier<'a, CS> {
             .map(TransactionView::proposal_short_id)
             .collect();
 
-        let difference: Vec<_> = committed_ids.difference(&proposal_txs_ids).collect();
-
-        if !difference.is_empty() {
+        if committed_ids.difference(&proposal_txs_ids).next().is_some() {
             error_target!(
                 crate::LOG_TARGET,
                 "BlockView {} {}",