[persistence] Optimize result parsing in GenericPojoDao::getV2 (#1804)

* [persistence] Optimize result parsing in GenericPojoDao::getV2

* Add final

---------

Co-authored-by: Anshul Singh <anshul.singh@anshuls-macbook-pro-1.wyvern-sun.ts.net>

Author: anshul98ks123

thirdeye-persistence/src/main/java/ai/startree/thirdeye/datalayer/dao/GenericPojoDao.java

@@ -440,10 +440,11 @@ public <E extends AbstractDTO> List<E> getV2(final DaoFilter daoFilter) {
               Collections.emptyMap(),
               GenericJsonEntity.class,
               connection));
-      final List<E> results = new ArrayList<>();
+      final List<E> results = new ArrayList<>(entities.size());
       if (CollectionUtils.isNotEmpty(entities)) {
+        final Class<E> beanClass = (Class<E>) daoFilter.getBeanClass();
         for (final GenericJsonEntity entity : entities) {
-          final E e = toDto(entity, (Class<E>) daoFilter.getBeanClass());
+          final E e = toDto(entity, beanClass);
           results.add(e);
         }
       }