PERF: release results in a couple of cases

app/jobs/scheduled/grant_anniversary_badges.rb

@@ -33,7 +33,8 @@ module Jobs
         HAVING COUNT(p.id) > 0 AND COUNT(ub.id) = 0
       SQL
 
-      user_ids = results.map { |r| r['user_id'].to_i }
+      user_ids = results.column_values(0)
+      results.clear
 
       User.where(id: user_ids).find_each do |user|
         BadgeGranter.grant(badge, user, created_at: end_date)

app/jobs/scheduled/grant_new_user_of_the_month_badges.rb

@@ -82,7 +82,10 @@ module Jobs
         LIMIT #{MAX_AWARDED}
       SQL
 
-      User.exec_sql(sql).map { |r| [r['id'].to_i, r['score'].to_f] }.to_h
+      result = User.exec_sql(sql)
+      rval = result.map { |r| [r['id'].to_i, r['score'].to_f] }.to_h
+      result.clear
+      rval
     end
 
   end