Bielawski, S. Brubach, J.B. Cassinari, L. Couprie, M.-E. Evain, C. Labat, M. Le Parquier, M. Manceron, L. Ricaud, J.P. Roussel, E. Roy, P. Szwaj, C. Tordeux, M.-A. TUP050 electron laser detector FEL storage-ring 2015 2015-12 Many single-shot recording setups are based on the encoding of the information onto a laser pulse. This concerns in particular electro-optic sampling of bunch shapes, and VUV/X pulse monitors using transient reflectivity. The upgrade of these methods to high repetition rates presents challenging issues, that are due to the limited speed of the recording cameras. Recently [1], we demonstrated that multi-MHz repetition rates can be achieved using a relatively simple upgrade of existing setups, using the so-called "photonic time-stretch" technique. Here we present guidelines for the practical realization in the case of electro-optic sampling. We also present a performance analysis, and compare it to the spectral encoding case. The technique is potentially applicable to other cases where the information can be encoded on a chirped laser pulse, as, e.g., transient reflectivity diagnostics of XUV pulses.