These mappings will be implemented in the chosen middleware but should not be so onerous as to introduce major performance issues.

这些映射将在所选的中间件中实现，但不应该像引入主要性能问题那样麻烦。

youdao

As stated above, performance is the major concern in query tuning.

如上所述，性能是查询调优中主要关心的问题。

youdao

Unfortunately, using dynamic proxy classes does have one major drawback: performance.

不幸的是，使用动态代理类确实有一个重要不足：性能。

youdao

But Todd Duncan began a major change in classical musical performance in the United States.

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