Often what you should test is the relative error in terms of ULPs.

通常，就ulp进行测试时考虑的是相对错误。

youdao

That's very small — that's what we call the relative error.

非常小，我们称其为相对误差。

youdao

But instead of measuring one period, I'm going to measure ten periods, because that gives me a smaller uncertainty, a smaller relative error in my measurements.

并不是，测量一个周期，而是，测量10个周期，因为这样，不确定性减小，测量值的，相对误差减小。

youdao

However, as index-based mutual funds and ETFs continue to gain popularity and active managers are increasingly pressured to control their performance tracking error relative to benchmark indexes, the markets could become less efficient.

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