From 95cc07409d2213d87dbff7231a29bacc4cdebc16 Mon Sep 17 00:00:00 2001
From: Edd Robinson <me@edd.io>
Date: Fri, 3 Jul 2020 15:04:57 +0100
Subject: [PATCH] perf: avoid bounds check

---
 delorean_tsm/src/mapper.rs | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/delorean_tsm/src/mapper.rs b/delorean_tsm/src/mapper.rs
index c19a1151b7..45ba1f2de8 100644
--- a/delorean_tsm/src/mapper.rs
+++ b/delorean_tsm/src/mapper.rs
@@ -468,10 +468,10 @@ fn refill_value_pair_buffer(
     blocks: &mut BTreeMap<String, BlockData>,
     dst: &mut Vec<Option<ValuePair>>,
 ) {
-    for (i, block) in blocks.values_mut().enumerate() {
-        if dst[i].is_none() {
+    for (block, dst) in blocks.values_mut().zip(dst) {
+        if dst.is_none() {
             // (ts, value) pair has been used - fetch next pair (if any).
-            dst[i] = block.next_pair();
+            *dst = block.next_pair();
         }
     }
 }