压缩也可以并行执行，但这会降低活动对象的打包效果，可能会生成几个较小的闲置空间，而不是一整块闲置空间。

Compaction can also be done in parallel, but it results in a less efficient packing of the live objects — instead of a single block of free space, several smaller ones might be created.

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刚开始差异可能很小，但做一些数学运算，就能明白执行优化比起置之不理，长期效果是多么的明显。

Remember that the Numbers may seem small at first, but it's important to do some math to figure out the long-term benefits of performing the optimization before dismissing it.

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因此，“发挥并增强核心产品优势”的战略虽然执行起来很容易，而且初期效果显著，但着实短视。

So, the "leverage-and-enhance-the-core-product" strategy is an easy reach to execute, and offers appealing initial momentum, but it is short-sighted.

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