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TheAlgorithms · Apr 4, 2024 · 223c8d2 · 223c8d2
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commit 223c8d2
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/src/data_structures/queue/list.clj b/src/data_structures/queue/list.clj
@@ -15,6 +15,8 @@
     (drop-last 1 queue)))
 
 (defn peek-queue
+  "this implementation is more performant than using `last` or `reverse`
+  they both traverse the entire collection whereas count is stored on the PersistenceList object"
   [queue]
   (when-not (empty? queue)
     (nth queue (dec (count queue)))))