对于本机代码，这对应于CPU的程序计数器。
For native code, this corresponds to the CPU's program counter.
因此，对于JNI 来说，本机代码从传递进来的对象中访问大量单独字段时会导致性能降低。
For JNI, therefore, causing the natives to reach for many individual fields from the objects passed to them leads to poorer performance.
然而，解释url的方法及在本机代码的映射对于不同的平台来说是不同的。
However, the way that URLs are interpreted and mapped in the native code differs between platforms.
由于托管代码和本机代码的调用堆栈之间存在差异，因此对于混合的代码类型，调试器不能始终显示完整的调用堆栈。
Because of differences between call stacks for managed and native code, the debugger cannot always show the complete call stack when the code types mix.
由于托管代码和本机代码的调用堆栈之间存在差异，因此对于混合的代码类型，调试器不能始终显示完整的调用堆栈。
Because of differences between call stacks for managed and native code, the debugger cannot always show the complete call stack when the code types mix.
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