diff --git a/src/Router.php b/src/Router.php
index 655c83b..bbbb6ae 100644
--- a/src/Router.php
+++ b/src/Router.php
@@ -43,8 +43,8 @@ class Router
 	 */
 	public function lookup(string $method, string $uri): array
 	{
-		// normalize uri to be tolerant of trailing slashes
-		$uri = '/' . trim($uri, '/');
+		// trim once and reuse
+		$trimmed = trim($uri, '/');
 
 		// node is a reference to our current location in the node tree
 		$node = $this->routes;
@@ -52,8 +52,8 @@ class Router
 		// init the response array
 		$res = ['code' => 0, 'handler' => null, 'params' => []];
 
-		// if the URI is just a slash, we can return the handler for the root node
-		if ($uri === '/') {
+		// if the URI is root
+		if ($trimmed === '') {
 			if (!$this->checkForHandlers($node)) {
 				$res['code'] = 404;
 				return $res;
@@ -70,7 +70,7 @@ class Router
 		}
 
 		// we'll split up the URI into segments and traverse the node tree
-		foreach (explode('/', trim($uri, '/')) as $segment) {
+		foreach (explode('/', $trimmed) as $segment) {
 			// check that the next segment is an array (not a callable) and exists, then move to it
 			if (isset($node[$segment]) && is_array($node[$segment])) {
 				$node = $node[$segment];
@@ -182,4 +182,4 @@ class Router
 	{
 		return $this->add('HEAD', $route, $handler);
 	}
-}
+}
\ No newline at end of file