首次访问慢

spring+druid,配置init-method="getConnection"，系统启动成功后，首次执行Insert操作非常慢，耗时50毫秒，第二次Insert操作恢复正常10毫秒以内。每个docker都是启动成功后第一次慢，第二次访问数据库就正常了。

No source files or tests are named. First reproduce the slow first Insert after startup with Spring, Druid configured with init-method="getConnection", and Docker, then compare it with the second Insert and trace the connection initialization path; done means identifying and resolving the startup-only delay while preserving normal subsequent Insert timing.

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