Phase space diagram of emission duration and emission bandwidth versus pseudo luminosity (S_pkD²), for different fast radio transients at peak flux S_pk and distance D. FRBs are similar to other fast transients in their short and relatively broadband emission; however, in pseudo luminosity, they strongly stand out from the pulsars, magnetars, and giant pulses also plotted. Catalogue data, per 2022 Feb 1, taken from FRBCAT (Petroff et al. 2016), the Transient Name Server (TNS; http://www.wis-tns.org), ATNF (Manchester et al. 2005), and EPN (http://www.epta.eu.org/epndb/) were complemented by individual data from Camilo et al. (2006), Maan et al. (2019), Dai et al. (2019), Pearlman et al. (2018), Mikami et al. (2016), Bera & Chengalur (2019), and Bochenek et al. (2020a).