Compensate Amplifiers or Not ! & How best ?

[Zero D]

Over the past few days i've been designing some new audio circuits. I decided to experiment with different values/types of compensation, instead of the usually quoted/shown ones. In this instance these are buffers.

For years in Numerous articles etc etc, for the feedback i've seen either, a direct link, a resistor, or resistor & capacitor.

I was surprised to see the differences between them ! I discovered that a solitory resistor was best

I realise the peaks are @ Very high f's, & it's a buffer, but i'm wondering if this discovery "might" affect the performance of other circuits in some way/s, positive, or negative, when other factors are taken into consideration, such as other means of compensation etc are included ?

[AndrewT]

The resistor in the unity gain feedback path is specified for some opamps.
There are a couple of opamp papers that suggest this resistor should always be fitted even when the datasheet does not mention it.

[DUG]

I would not worry about anomalous behavior at 3.5MHz.

What amp model was used?

[Zero D]

@ AndrewT

Yes i've seen those.

@ DUG

I know but i found it interesting that it happens, & a good way to cure it.

It's an OP27