How much does an op-amp delay?
Using an LTspice simulation with 100&nbsp;MHz 0.5&nbsp;V peak sine wave input and the Figure 36 unity gain buffer (+/-5&nbsp;V supplies), and a 20&nbsp;pF load, I get about 130&nbsp;ps.







You can see from Figure 5 (in the datasheet) that it is much less than 1&nbsp;ns.