tech_blog_20220405_3.scala

// データを10件用意
val userSeq: Seq[User] = 
  (1L to 10L).map(id => User(UserId(id), "name" + id.toString))
val groupSeq: Seq[Group] = 
  (1L to 10L).map(id => Group(GroupId(id), "name" + id.toString))
val groupMemberSeq: Seq[GroupMember] = 
  (1L to 10L).map(id => GroupMember(GroupMemberId(id), UserId(id), GroupId(id)))
val startTime = System.currentTimeMillis
val result: Seq[UserView] = ...
println((System.currentTimeMillis - startTime).toString + "ミリ秒")