到目前为止，已经实现了一些新的优化，但是显然还有更多的工作要做，以确保 GCC 生成尽可能紧凑、有效的代码。
Several new optimizations have been implemented to date, but more work is obviously ahead to ensure that GCC generates the most compact and efficient code possible.
从很低端的桌面系统到大型的、企业级的、多处理器的系统，新的内存管理代码已经在它们上面都已经进行了测试和优化。
The new memory management code has been tested and optimized on everything from very low end desktop systems to large, enterprise-class, multi-processor systems.
新的处理器架构不断涌现，新的研究发现优化和生成代码的更好方式。
New processor architectures continue to appear, and new research finds better ways to optimize and generate code.
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