虽然一些数据库操作可以并行执行，但是增加额外的数据库连接只能将应用程序提速到某一点。
Several database operations can be executed in parallel, but additional database connections speed up the application only to a point.
车辆在高速公路匝道提速到每小时60公里以上时，可直接驶入行车道。
When a vehicle has increased its speed to more than 60 kilometers per hour on the ramp of an expressway, it may directly enter the carriageway.
速度：计算密集的代码会从新引擎得益较多，一般有10%到30%的性能提升，某些情况下最高可提速50%。
Speed: The engine will mostly benefit computationally intensive code, usually between 10% and 30% performance increase, with some cases going up as high as being 50% faster.
速度：计算密集的代码会从新引擎得益较多，一般有10%到30%的性能提升，某些情况下最高可提速50%。
Speed: The engine will mostly benefit computationally intensive code, usually between 10% and 30% performance increase, with some cases going up as high as being 50% faster.
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