This is necessary to isolate the relational layer from the object layer, but this convenience comes at the cost of performance.
这对于将关系层与对象层分离是必需的，但这种便利是以牺牲性能为代价获得的。
This approach to serialization forces a string representation of the entire object to be created in memory before a single character can be written, which is a big performance drag for large objects.
这种序列化方式强行在写入一个字符之前在内存中建立整个对象的字符串表示，对于大型对象来说，这是个非常大的性能拖累。
For example, object pooling reduces the amount of garbage generated by an application but can seriously hurt garbage collection performance.
例如，对象轮询会减少应用程序生成的垃圾数量，但严重降低了垃圾收集的性能。
To tune performance when using concurrent message delivery, we must turn our attention to a number of object pools managed by the application server.
为了在使用并发消息传递时优化性能，我们必须将注意力转向应用程序服务器托管的许多对象池。
Many factors can affect the performance of a database server, such as hardware system design, database object design, data storage management, application design, and so forth.
许多因素都可以影响数据库服务器的性能，例如硬件系统的设计、数据库对象的设计、数据存储器的管理、应用程序的设计等等。
The first level consists of the performance object, which is a unit that can model a physical device or abstract component in a system.
第一级包括性能对象，它是可以为物理设备建模，或者抽象系统中组件的单元。
However, there could be a price to pay in terms of performance. There is (potential) overhead in object creation and in method dispatch.
但是，这可能会以牺牲性能为代价，对象创建和方法分配都可能会存在开销。
Regardless of the technique you use for the implementation code, repeatedly updating a single object can cause a performance hotspot in the repository if the volume is high.
不管您使用什么技术来实现代码，重复地更新一个对象会导致高访问率储存库的性能下降。
The settings of the various object properties have a significant impact on the behavior and performance of the JMS application.
各种对象属性的设置对JMS应用程序的行为和性能有重要影响。
The second level consists of the performance counter, which is an attribute of the performance object.
第二级包括性能计数器，它是性能对象的属性。
Both the creation of the factory and the manager object incur high performance costs (similar to connecting to a database with JDBC).
工厂的创建和管理器的创建都会导致较高的性能代价(类似于用JDBC连接到一个数据库)。
Because session creation is costly, in terms of performance, it is a good strategy to reuse the session object whenever possible.
就性能而言，因为会话创建是昂贵的，所以在可能的时候，复用会话的对象是很好的策略。
By selecting the process performance object in the "Add counters" dialog, a comprehensive list of process level counters are displayed (Figure 5).
通过在“AddCounters”对话框中选择process性能对象，就可以显示进程级计数器的整个清单(图5)。
Other applications with similar performance criteria but different patterns of object creation might perform best with the optthruput policy.
其他具有类似性能标准和不同对象创建模式的应用程序可能使用optthruput策略会更好。
This safety comes at some performance cost: the creation of a new object every time a getter or setter is called.
这一安全是以一些性能为代价换来的：每次调用一个getter或setter都会创建一个新对象。
The XOM document object model protects users from common mistakes in the use of XML, while offering good performance and memory-efficiency.
The XOM文档对象模型可以防止用户在使用XML时出现的常见错误，同时提供了良好的性能和高效的内存使用。
When you create a NotesGroupManager object, you have the option to disable recursive functionality and deal with the groups as "flat" collections of members for better performance.
创建NotesGroupManager对象时，可以选择禁用递归功能并将组作为成员的“平面（flat）”集合来处理，以便获得更好的性能。
Hibernate is very good tool when it comes to object relational mapping, but in terms of connection management and transaction management, it is lacking in performance and capabilities.
当涉及到对象关系映射时，Hibernate是非常好的工具，但是在连接管理以及事务管理方面，它却缺乏必要的性能和能力。
The final performance tip takes advantage of the fact that nearly all of the jQuery selectors return the jQuery object.
最后一个性能技巧利用了几乎所有jQuery选择器都返回 jQuery 对象这个特性。
Whenever possible, avoid creating objects to prevent associated performance costs of calling the constructor, and subsequent cost of GC when an object reaches the end of its lifecycle.
只要有可能，应该避免创建对象，防止调用构造函数带来的相关性能成本，以及在对象结束其生命周期时进行垃圾收集所带来的成本。
This means that you only pay the performance penalty of building an object model for those portions of an XML document which actually need to be accessed through the model.
这意味着，只有为实际需要通过模型访问的XML文档部分构建对象模型才会带来性能损失。
Object oriented design questions are very important, as they demonstrate the quality of a candidate's code a poor performance on this type of question raises serious red flags.
面向对象设计的问题非常重要，它能反映出面试者的代码质量。若是对此类问题支支吾吾，面试多半就凶多吉少了。
With all of the performance issues related to object members, it's easy to believe that they should be avoided whenever possible.
由于所有这些性能问题与对象成员有关，所以如果可能的话请避免使用它们。
The PDH interface is an abstraction of the details required to retrieve performance object and performance counter data from the Windows Registry.
PD H接口是从Windows Registry中检索性能对象和性能计数器所需的细节的抽象。
The goal of ERP implementation, the object and principles of ERP performance measurement are discussed.
探讨了ERP系统实施目的、绩效评价的目标和原则。
Stored procedure is an important database object. To use it appropriately simplifies the development of the application procedure, enhances the performance characteristics of the system.
存储过程是一种重要的数据库对象，恰当地使用存储过程可以简化应用程序的开发，提高系统的运行性能。
They use the exquisite skills, ingeniously carved pose of the object to use performance figures or animal emotions, make the sculpture is full of vigor and more close to the life.
他们运用精湛的技巧，巧妙地使用雕刻对象的动势来表现人物又或者动物的内心情感，使雕刻作品充满了生机，也更加贴近生活。
In order to test the performance of the algorithm, several object functions are optimized including single-modal and multi-modal function.
为了测试该算法的性能，选择了几个目标函数进行优化，包括单峰函数和多峰函数。
In order to test the performance of the algorithm, several object functions are optimized including single-modal and multi-modal function.
为了测试该算法的性能，选择了几个目标函数进行优化，包括单峰函数和多峰函数。
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