我引入Python实现的运行时间作为基线；该版本完全没有优化。
I included the running time of the Python implementation as a baseline; this version is completely non-optimized.
有时候客户报告的性能问题中说某个特定查询的执行没有优化。
Sometimes customers report a performance problem where a specific query is not performing optimally.
例如，如果这两个本地谓词选择性没有优化器评估的强，怎么办？
For example, what if the two local predicates are not as selective as estimated by the optimizer?
FlockDB是一个存储图数据的数据库，但是它并没有优化遍历图的操作。
FlockDB is a database that stores graph data, but it isn't a database optimized for graph-traversal operations.
所以，使用一个直接综合方法没有优化是有利的，每当这是可适用的。
Therefore, it is advantageous to use a direct synthesis method without optimization whenever this is applicable.
注意：不要犯这种错误：以为优化后程序会和原来没有优化的程序一样运行。
Never make the mistake of assuming that the optimized program will behave the same as the unoptimized one.
GCC的一个缺陷是，它并没有接近尽可能多的调试检查微软的编译器编译时没有优化。
One of GCC's flaws is that it doesn't do anywhere near as much debug checking as Microsoft's compiler when compiling without optimizations.
逻辑密钥树方案是一种集中式的组播密钥管理方案，有效地减轻了组管理器和组成员的负担，但是却没有优化组通信初始化的过程。
LKH scheme is a centralized multicast key management scheme and it lightens the burden of the sever and group members efficiently, but it doesn't present the process of initialization clearly.
这就是没有为移动设备优化的网络程序的默认值。
This is the default for web applications not optimized for mobile devices.
此外，如果在头脑中没有一个清晰的策略，是很难优化测试脚本分解的。
Furthermore, it is difficult to optimize the test script decomposition without a clear strategy in mind.
这使得数据库系统管理员可以优化没有使用更新语句处的性能，或使用更新语句时也可以防止死锁。
This allows the database administrator to optimize the performance where the update syntax is not used, or to prevent deadlocks when it is used.
如果优化器在计划时没有必要的信息就会造成这种情况。
This can happen when the optimizer does not have the necessary information at planning time.
即使你花了好几个小时在优化简历上，没有一个好的求职信，你的工作也是算做了一半。
Even if you have spent many hours polishing your CV, without a good covering letter, your work is only half done.
根据上面内容进行优化，但没有线程亲和力，延迟大约为—250微秒。
Tuned as above, but without thread affinity, the latency is rather high-around 250 microseconds.
首先我使用默认配置构建了性能基准，没有进行其他优化。
First, I established a baseline of performance, using default configurations and no special tuning.
在每天日落时，并没有魔法杖可以帮助您优化软件。
At the end of the day, there is no magic wand that will optimize your software for you.
CE服务器没有“优化”中间(冗余)更新。
The CE server does not "optimize away" intermediate (redundant) updates.
或者，关键词是合适的，但是没有经过充分优化。
如果没有完成，尝试优化DB2的相关参数。
即使在这些工作完成以后，仍然很难说哪些优化起作用了，而哪些没有起作用。
Even after all of this work, it is still impossible to say much of anything beyond which optimizations appeared to work and which ones didn't.
如果inner没有被内联，那么这个优化是不可能发生的。
Had inner not been inlined, this optimization would not have been possible.
没有使用任何优化标记所编译出来的代码的速度大约会慢5倍，因此要确保使用-O2或-O3标记来编译程序。
Code that was compiled without any optimization flags resulted in code that was approximately five times slower, so be sure to always compile with -o2 or -o3.
Web服务器经常没有专为速度而优化；
在前一个实例中，如果customer . customer_num和orders . customer_num都没有被索引，那么优化器将选择动态哈希连接来作为最佳的执行计划。
In the previous example, if customer.customer_num and orders.customer_num are not indexed, dynamic hash join would be chosen by the optimizer as the best execution plan.
由于这个类型没有为选择和分类做优化，所以我们们把日期属性作为Mingle R 1.1版的核心部分。
As this type was not optimized for the selection and sorting of dates, we have made date properties a core part of Mingle with R1.1.
Ajax应用借助于浏览器和HTTP协议强大的分布力量，然而浏览器和HTTP协议本身对分布ajax应用没有特别的优化。
Ajax application distribution leverages the distribution power of the browser and HTTP, however the browser and HTTP are not optimized for distributing Ajax applications.
注意，shared _ data_nonalign还没有被优化。
确保优化准则的table属性中没有指定别名和基本表名。
Make sure that the alias and not the base table name is specified in the table attribute in the optimization guideline. For example, to request an XML index access for the following query.
但作为手机搜索引擎，Taptu在搜索结果中并不包含任何地图，也没有根据用户方位优化搜索结果，实在是令人不解。
Oddly, especially for a mobile search engine, Taptu doesn't feature any maps in its search results and it doesn't seem to optimize its search based on your location.
比这更糟糕的是，这样的系统很多都没有经过优化，容易受到部分或全面故障和外部攻击的威胁。
Worse than this, many such systems are not optimized and are vulnerable to the threats of partial or complete failure and external attacks.
应用推荐