diff --git a/src/display/hunks.rs b/src/display/hunks.rs
index 3b952fd6fc..1e5d1e578a 100644
--- a/src/display/hunks.rs
+++ b/src/display/hunks.rs
@@ -595,10 +595,10 @@ fn either_side_equal(
     false
 }
 
-pub fn matched_lines_for_hunk(
-    matched_lines: &[(Option<LineNumber>, Option<LineNumber>)],
+pub fn matched_lines_for_hunk<'a>(
+    matched_lines: &'a [(Option<LineNumber>, Option<LineNumber>)],
     hunk: &Hunk,
-) -> Vec<(Option<LineNumber>, Option<LineNumber>)> {
+) -> &'a [(Option<LineNumber>, Option<LineNumber>)] {
     let mut hunk_lhs_novel = hunk.novel_lhs.iter().copied().collect::<Vec<_>>();
     hunk_lhs_novel.sort();
 
@@ -645,7 +645,7 @@ pub fn matched_lines_for_hunk(
         end_i = matched_lines.len();
     }
 
-    matched_lines[start_i..end_i].to_vec()
+    &matched_lines[start_i..end_i]
 }
 
 #[cfg(test)]
diff --git a/src/display/side_by_side.rs b/src/display/side_by_side.rs
index 72f5ce73fd..eac5c212bd 100644
--- a/src/display/side_by_side.rs
+++ b/src/display/side_by_side.rs
@@ -406,27 +406,27 @@ pub fn print(
 
         let source_dims = SourceDimensions::new(
             display_options.display_width,
-            &aligned_lines,
+            aligned_lines,
             &lhs_lines,
             &rhs_lines,
         );
         for (lhs_line_num, rhs_line_num) in aligned_lines {
             let lhs_line_novel = highlight_as_novel(
-                lhs_line_num,
+                *lhs_line_num,
                 &lhs_lines,
-                rhs_line_num,
+                *rhs_line_num,
                 &lhs_lines_with_novel,
             );
             let rhs_line_novel = highlight_as_novel(
-                rhs_line_num,
+                *rhs_line_num,
                 &rhs_lines,
-                lhs_line_num,
+                *lhs_line_num,
                 &rhs_lines_with_novel,
             );
 
             let (display_lhs_line_num, display_rhs_line_num) = display_line_nums(
-                lhs_line_num,
-                rhs_line_num,
+                *lhs_line_num,
+                *rhs_line_num,
                 &source_dims,
                 display_options.use_color,
                 display_options.background_color,
@@ -554,10 +554,10 @@ pub fn print(
             }
 
             if lhs_line_num.is_some() {
-                prev_lhs_line_num = lhs_line_num;
+                prev_lhs_line_num = *lhs_line_num;
             }
             if rhs_line_num.is_some() {
-                prev_rhs_line_num = rhs_line_num;
+                prev_rhs_line_num = *rhs_line_num;
             }
         }
         println!();