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An alternative way to increase Formik’s performance is shown. The problem is the constant re-rendering of Emotion. This method isn’t necessarily exclusive to Material-UI (although MUI is being used as an example here) and this works for both: V4.x and V5.x. The concept is pretty simple: We let the `<TextField />` component handle its own internal state, and then we propagate the change to Formik with an `onBlur `event. This is kind of hacky, but it mostly works.