另外，重建可能是唯一能够了解珍宝在受时间侵蚀之前的模样的方法。
What's more, reconstructions might be the only way to know what treasures looked like before time wore them down.
所有的方法都是在首次运行之前编译的，即J VM的启动时间可能会很慢，但是后来的性能会很好。
All methods are compiled before being run for the first time, meaning that startup time of the JVM can be slow, but later performance will be good.
这里包装器方法只是保存当前时间，然后调用改名后的原方法，并在返回调用原方法的结果之前打印时间报告。
Here the wrapper method just saves the current time, then calls the renamed original method and prints a time report before returning the result of the call to the original method.
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