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.

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探讨了一种对C语言编译程序所生成的汇编代码进行人工干扰、手工优化的新方法。

This paper inquires into a new method to be used to optimize handwork with assemble code created by C-compiler which needs optimization theory and assemble knowledge.

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它具有分布式系统结构，采用一个启发式算法搜索一个很大而复杂的优化空间以提高被编译程序的运行性能。

It has a distributed architecture and employs a heuristic algorithm to explore a large and complex optimization space for performance improvement.

youdao

它具有分布式系统结构，采用一个启发式算法搜索一个很大而复杂的优化空间以提高被编译程序的运行性能。

It has a distributed architecture and employs a heuristic algorithm to explore a large and complex optimization space for performance improvement.

youdao