diff --git a/src/lib.rs b/src/lib.rs
index 634a5ca..3f44254 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -165,10 +165,7 @@ fn is_id_available(ids: &Vec<String>, id: &String) -> bool {
 
 /// e.g. pass all tile IDs into this to get a new non-conflicting tile ID
 #[inline]
-fn new_unique_id(mut ids: Vec<String>) -> String {
-    ids.sort();
-    ids.dedup();
-
+fn new_unique_id(ids: Vec<String>) -> String {
     let mut new_id: u64 = 0;
 
     while ids.contains(&new_id.to_base36()) {