Here are some impressive feats from healthy or Edo Itachi's flicker-speed:
Itachi blitzed three full-Sharingan Uchiha:
Itachi's shunshin worked better than Sasuke's Susano'o arrow...
Even Killer Bee needed warnings to see it, despite stopping A's speed earlier:
Does anybody, aside from the obvious Yellow Flash and son, have feats that beat these?