unique

Author: tushushu

ulist/src/floatings/float32.rs

@@ -257,7 +257,7 @@ impl FloatList32 {
             vec.push(self.na_value());
         }
         // Construct List.
-        let mut hset = HashSet::new();
+        let mut hset = HashSet::with_capacity(1);
         if self.count_na() > 0 {
             hset.insert(vec.len() - 1);
         }

ulist/src/floatings/float64.rs

@@ -257,7 +257,7 @@ impl FloatList64 {
             vec.push(self.na_value());
         }
         // Construct List.
-        let mut hset = HashSet::new();
+        let mut hset = HashSet::with_capacity(1);
         if self.count_na() > 0 {
             hset.insert(vec.len() - 1);
         }

ulist/src/non_float.rs

@@ -65,7 +65,7 @@ where
             }
         };
         // Construct List.
-        let mut hset = HashSet::new();
+        let mut hset = HashSet::with_capacity(1);
         if self.count_na() > 0 {
             hset.insert(vec_dedup.len() - 1);
         }