重複チェック&削除

    console.time("isDuplicateIncludes")
    const isDuplicateIncludes = ctx.participatingList.userList
      .map(user => user.peerId)
      .includes(payloadUserName.peerId)
    console.timeEnd("isDuplicateIncludes")
    console.log("isDuplicateIncludes 重複チェック", isDuplicateIncludes)

    console.time("isDuplicateSome")
    const isDuplicateSome = ctx.participatingList.userList.some(
      user => user.peerId === payloadUserName.peerId
    )
    console.timeEnd("isDuplicateSome")
    console.log("isDuplicateSome 重複チェック", isDuplicateSome)

function removeDuplicatePeerIds(data: UserListProps[]) {
  const uniquePeerIds = new Set()

  const filteredData = data.filter(item => {
    if (!uniquePeerIds.has(item.peerId)) {
      uniquePeerIds.add(item.peerId)
      return true
    }
    return false
  })

  return filteredData
}