哪个性能好?
// 1. 多次查询 const users = await Promise.all(userIds.map(id => { return this.userRepository.findOne({ where: { id } }) })) // 2. 一次查询 const users = await this.userRepository.createQueryBuilder('user') .where('user.id IN (:...ids)', { ids: userIds }) .getMany() 