低编译开销更容易被反复执行热代码带来的性能优势掩盖。

Low compilation overhead is maintained that can be more easily hidden behind the performance benefit from repeatedly executing the hot code.

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设计这种交换机很有挑战性，需要考虑几个因素：高可靠性、无停机时间(热代码升级)、大规模并发性。

The design considerations for switches like these are challenging: extreme reliability, no downtime (hot code upgrades), and massive concurrency.

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当在同一个机器上安装时，Version 5的测试环境是被激活的(工件的自动再次载入，热代码交换等等)。

When installed on the same machine, the behavior of the Version 5 test environment is enabled (automatic reloading of artifacts, hot code swapping, and so forth).

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