In the pages of The Flash #50 by writer Joshua Williamson and artist Howard Porter, DC Comics have finally answered which Flash is the fastest, Barry Allen or Wally West. Both have a strong connection to the Speed Force and both have operated as the Flash for years, but now we know which one is truly the fastest man alive.
Warning: full spoilers ahead!
Issue #50 marks the conclusion of the Flash War storyline that pitted Barry against Wally. Naturally, it turns out their longtime nemesis Zoom was the one manipulating them against each other, and so the two speedsters joined together to stop the villain. The story reached its climax as Zoom took off in an attempt to execute his master plan, leaving Barry and Wally to give chase.
Source:: IGN -Reviews