通过减少执行查询时需要检索的元组（tuple）的数量，以及减少查询所需的计算，函数索引能够显著改善性能。
They improve performance by reducing the number of tuples fetched during query execution.
如果JIT编译会延迟启动又不能显著改善应用程序的长期性能，则执行这种编译就非常浪费。
Performing JIT compilations that delay start-up yet do not significantly improve the application's long-term performance are particularly wasteful.
DB 2Optimization Expert识别执行情况较差的SQL并提供一组全面的专家建议程序，帮助改善性能并降低总体所有权成本。
DB2 Optimization expert identifies poorly performing SQL and offers a comprehensive set of expert advisors that can help improve system performance and lower total cost of ownership.
因为预先缓存了来自[HistoricSales]数据集的查询结果，所以整个时间段的销售数据执行的查询性能得到了改善。
Because query results from the [HistoricSales] cube are pre-cached, the performance for queries that are run against the sales data of the entire time period is improved.
本发明通过减小日志记录大小并允许恢复操作的并行执行，改善了日志系统的性能。
The present invention improves the performance of a logging system by reducing the size of log records and by allowing parallel execution of recovery operations.
最新版的PHP已经在性能方面做出了很大改善，提高的引擎执行、更好的内存使用以及新扩展的工具。
The latest version of PHP has been improvised and updated to make it easier to build for performance, improved engine execution, better memory usage, and a new and extended set of tools.
霍尼韦尔拥有丰富的设备和经验使BP执行其自动化战略，改善综合性能及我们资产操作的有效性。
Honeywell has the tools and experience to enable BP to implement its Automation strategy, improving integration and the operating efficiency of our assets.
霍尼韦尔拥有丰富的设备和经验使BP执行其自动化战略，改善综合性能及我们资产操作的有效性。
Honeywell has the tools and experience to enable BP to implement its Automation strategy, improving integration and the operating efficiency of our assets.
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