The main reason to use threads is to boost program performance.

使用线程的主要原因是要提高程序性能。

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Quantify tracks program performance and calling behavior, so you can see execution flow and identify bottlenecks.

Quantify追踪程序性能和调用行为，因此您能够发现执行流并识别出瓶颈。

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It's not hard to see why synchronization can have a significant effect on program performance; flushing the cache frequently can be expensive.

不难看出为什么同步会对程序的性能影响这么大；频繁地刷新缓存代价会很大。

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Producers hoped this year's host, actor Neil Patrick Harris, would add some zest to the program, and several Emmy recipients had warm praise for his performance.

VOA: standard.2009.09.21

"One has been the strong performance of the national immunization program.

VOA: standard.2009.11.10

All of this causes downward pressure on email program performance and revenues for marketers.

FORBES: Are Email Marketing Security Issues Undermining Your Brand?

It is ironic that tying spending decisions to program performance is viewed by some as something new, that the Administration even had to establish an initiative for such a basic element of good government.

WHITEHOUSE: Testimony of Mitchell E. Daniels, Jr.

Within a command-and-control regulatory program, performance-based standards may offer advantages over standards specifying design, behavior, or manner of compliance.

WHITEHOUSE: Memoranda 01-27 (Guidance for Implementing E.O. 13211)