perf: reduce branching in hot code paths

Signed-off-by: Jérôme Benoit <jerome.benoit@piment-noir.org>

Author: jerome-benoit

CHANGELOG.md

@@ -8,6 +8,10 @@ and this project adheres to
 
 ## [Unreleased]
 
+### Changed
+
+- Reduce branching in several hot code paths.
+
 ## [0.1.11] - 2023-12-25
 
 ### Fixed

src/deque.ts

@@ -79,7 +79,7 @@ export class Deque<T> {
       return
     }
     const tail = this.tail
-    this.tail = (this.tail as Node<T>).prev
+    this.tail = this.tail!.prev
     if (this.tail == null) {
       delete this.head
     } else {
@@ -155,7 +155,7 @@ export class Deque<T> {
           value: node.data,
           done: false,
         }
-        node = node.next as Node<T>
+        node = node.next
         return ret
       },
     }
@@ -183,7 +183,7 @@ export class Deque<T> {
               value: node.data,
               done: false,
             }
-            node = node.prev as Node<T>
+            node = node.prev
             return ret
           },
         }