Spring Data JPA：插入和选择查询非常慢

Question

我有一个非常简单的 spring-data-jpa + Hibernate 应用程序，它将客户数据存储在 MySql 数据库中（完整的源代码在此处发布）。

问题是它运行插入和选择查询的速度非常慢，与我通过 mysql CLI 所拥有的相比：

• 插入一行大约需要3600 毫秒，
• 全选（仅 2 行）大约需要1700 毫秒
• 两个查询都在 mysql CLI 中占用大约0.12s。

有讨论过类似的问题在这里，但在我的情况的测量方式更糟（尽管我不插入批次，它在DB只是一个简单的行）。有没有办法提高 Spring JPA/Hibernate 的性能？

另一个问题，有没有办法减少 spring-data-jpa 和 hibernate-entitymanager 的大小？我能够在不损害程序的情况下排除字节伙伴和 jandex 依赖项，但这只是几个 Mbs（阴影 jar 大小从 19.6Mb 减少到 16.6Mb）？

更新 根据请求，这里是代码（所有来源都在这里）：

@Entity
@AttributeAccessor("field")
@Table(name = "customer")
public class Customer implements Serializable{
  @Id
  @GeneratedValue(strategy = GenerationType.AUTO)
  @Column(name="id",unique=true, nullable=false, insertable=true, updatable=true)
  @Type(type="long")
  private Long id;

  @Column(name = "name")
  private String name;
//+ constructors, getters/setters
}

这是 Spring 应用程序并保存（插入）客户：

public class Application {
  private static ApplicationContext applicationContext;

  static CustomerRepository customerRepository;

  public static void main(String[] args) throws InterruptedException {

    AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(MySQLAutoconfiguration.class);

    customerRepository = ctx.getBean(CustomerRepository.class);
    runTest();
  }

private static void runTest () throws {
...
//insert
  Customer customerJohn = customerRepository.save(new Customer("John"));
//select
  Customer foundEntity = customerRepository.findOne(customerJohn.getId());
...
}

和配置：

@Configuration
@ComponentScan
@EnableJpaRepositories (basePackages = "com.vk.dal.repository")
@PropertySource("classpath:mysql.properties")
public class MySQLAutoconfiguration {

  @Autowired
  private Environment env;

  @Bean
  public DataSource dataSource() {
    final DriverManagerDataSource dataSource = new DriverManagerDataSource();

    dataSource.setDriverClassName(env.getProperty("spring.datasource.driver-class-name"));
    dataSource.setUrl(env.getProperty("spring.datasource.url"));
    dataSource.setUsername(env.getProperty("spring.datasource.username") != null ? env.getProperty("spring.datasource.username") : "");
    dataSource.setPassword(env.getProperty("spring.datasource.password") != null ? env.getProperty("spring.datasource.password") : "");

    return dataSource;
  }

  @Bean
  public LocalContainerEntityManagerFactoryBean entityManagerFactory(DataSource dataSource) {
    final LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
    em.setDataSource(dataSource);
    em.setPackagesToScan("com.vk.dal.domain");
    em.setJpaVendorAdapter(new HibernateJpaVendorAdapter());
    Properties properties = additionalProperties();
    if (properties != null) {
      em.setJpaProperties(properties);
    }
    return em;
  }

  @Bean
  JpaTransactionManager transactionManager(final EntityManagerFactory entityManagerFactory) {
    final JpaTransactionManager transactionManager = new JpaTransactionManager();
    transactionManager.setEntityManagerFactory(entityManagerFactory);
    return transactionManager;
  }


  final Properties additionalProperties() {
    final Properties hibernateProperties = new Properties();

    hibernateProperties.setProperty("hibernate.hbm2ddl.auto", env.getProperty("mysql-hibernate.hbm2ddl.auto"));
    hibernateProperties.setProperty("hibernate.dialect", env.getProperty("mysql-hibernate.dialect"));
    hibernateProperties.setProperty("hibernate.show_sql", env.getProperty("mysql-hibernate.show_sql") != null ? env.getProperty("mysql-hibernate.show_sql") : "false");

    return hibernateProperties;
  }

}

感谢任何帮助。