well this is a bit of a slow-ish box. it's my daily driver workstation at work. ampere emag (arm64 machine). numbers taken using strace -tt thus adding some overhead. time to launch eog (gnome/gtk image viewer) and go idle after drawing: 2.221 sec. definitely measurable. similar number for entice (efl image viewer) 2.294 sec. within spitting distance of each other (error margin) but time to tycat the same image in a terminal (between enter and image shown and terminal idle again: 0.123 sec. this is a server chip with 32 arm64 cores launched about 6 years ago or so. 3ghz. :) i definitely have benchmarked this kind of thing many many many times over the years. i've stared at process startup times and what toolkits do on startup to create a window etc. - i've memory and other profiled them a lot too. i know it's a good chunk cheaper to just tycat :) but it's more about less interruption to workflow.