Consider that traveling at ~ 0.9c is an everyday occurrence - the hooker is
"relative to what?" I am presently travelling at ~ .9c relative to a beam
of projectile particles in some Cern or Fermi-Lab accelerator (or some
particle on some distant quasar). To answer your question simply consider
how we view events in their rest frame - lifetimes become longer and
distances become shorter (to over-simplify).
The intended question however concerns what I would see if I traveled at
0.9c relative to my present state. Then I would be approaching an important
property of the fictitious "photon view" - the important property being that
I would then be travelling at ~ .9c relative to the my entire environment -
not just relative to a laboratory particle beam - what is the view then? Of
course, the question is of interest because the photon travels at c relative
to EVERYTHING!.