有关于 NHibernate 与 Fluent NHibernate 启动性能的数据吗？

简而言之，什么方法效果更快：

• SessionFactory 预编译 XML 配置，或
• 流畅的 NHibernate 提供 以编程方式配置 ?

我个人的经验是，配置对象的构建（无论是否使用 Fluent，这是不可避免的*）通常会使设置 FluentConfiguration 对象所需的时间相形见绌，并且随着映射数量的增加，该因子也会增加。

在 2.5 Ghz c2d 上，我的项目大约有 15 个映射，FluentConfiguration 花费了 360ms，Configuration 花费了 5215ms。

在具有 1000 个映射（具有 2-3 个字符串属性的简单类）的测试项目中，FluentConfiguration 花费了 470 毫秒，Configuration 花费了 40336 毫秒（40 秒！）。

_{*Actually, not really. most of the cost of Configuration comes from validating the XML mappings. Ayende has discussed it here (as well as a quick speedup obtained from merging the mappings into a single file), and a possible alternative to building the configuration at application startup is to serialize it as discussed here. In the 1000-mapping test project, this reduced the time required to get a Configuration object to around 30ms (although it has also increased the time required to build the SessionFactory from ~3 to ~4 seconds - I am unsure why).}