code standard question

recommend-server-service/src/main/java/com/tzld/piaoquan/recommend/server/service/rank/strategy/RankStrategy4RegionMergeModelV562.java

@@ -352,7 +352,7 @@ public class RankStrategy4RegionMergeModelV562 extends RankStrategy4RegionMergeM
 
         double beta_vov = mergeWeight.getOrDefault("beta_vov", 100.0);
 
-        List<Double> weightList = new ArrayList<>();
+        List<Double> weightList = new ArrayList<>(7);
         weightList.add(mergeWeight.getOrDefault("d2_ago_vov_w", 0.0));
         weightList.add(mergeWeight.getOrDefault("d1_ago_vov_w", 0.0));
         weightList.add(mergeWeight.getOrDefault("h48_ago_vov_w", 0.0));
@@ -410,7 +410,7 @@ public class RankStrategy4RegionMergeModelV562 extends RankStrategy4RegionMergeM
 
 
 
-            List<Double> featureList = new ArrayList<>();
+            List<Double> featureList = new ArrayList<>(7);
             featureList.add(d2_ago_vov);
             featureList.add(d1_ago_vov);
             featureList.add(h48_ago_vov);