What is the fastest compabt(fighter) aircraft of all time?

mig 25 codenamed foxbat nato.
rumoured designed intercept sr71 , a-11.

without load, can go faster mach 3
combat load, speed reduced mach 2.8
pretty good. f-16, light load : sidewinders on wing tips, can barely go past mach 2. f-14 doesn't go faster mach 1.81 loaded , f-15 eagle, mach 1.78 loaded.
speed isn't life, true, since question speed, here go.


trivia
max operating altitude 67,000 feet has been 123,492 feet or sustained altitude record. (the covert designation aircraft ye 266m)
typical max operating speed mach 2.5 because engines tend want become ramjets , overspeeded often. after flights @ mach 3, engines junked.

ps: sr71 blackbird purely reconnaissance aircraft flies @ 80,00 feet , mach 3.2 cannot carry kind of armament, defensive or offensive, so, not combat aircraft.

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