Ruby 1.8 implements userspace threads with performance problems and also don't make use of multiple cores.
Ruby 1.8实现了具有用户空间的线程，但是存在一些性能问题，而且也和多核系统不兼容。
You can also detect common performance problems, such as calling a method multiple times even though the result it produces does not change.
您还可以检测普遍的性能问题，例如即使方法生成的结果没有变化，还是调用该方法多次。
The Performance of CDMA approaches that of WDM, but it also faces some problems such as spectrum interference from multiple users and shot noise etc.
通常CDMA系统接近波分复用的性能，但是也面临一些有待解决的问题，例如多用户时的谱干扰、散弹噪声等。
The Performance of CDMA approaches that of WDM, but it also faces some problems such as spectrum interference from multiple users and shot noise etc.
通常CDMA系统接近波分复用的性能，但是也面临一些有待解决的问题，例如多用户时的谱干扰、散弹噪声等。
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