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In a recent article [R. R. Alfano and D. A. Nolan, Opt. Commun. 361 (2016)25] the group velocity reduction below the speed of light in the case ofcertain Bessel beam pulses has been considered and an idea of its applicationfor a natural optical buffer presented. However, the authors treat the problemas if only one type of Bessel pulse existed, no matter how it is generated. Thedeficiencies of the article stem from not being familiar with an extensiveliterature on Bessel pulses, in particular, with a couple of papers publishedmuch earlier in the J. Opt. Soc. Am. A, which have studied exactly the sameproblem more thoroughly.

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