How fast can you do the repair? Doesn't matter how you fixed it, whether it's by using slime liquid, sticky patch, new tube, CO and etc. It must be done in ONE repair that gets you to your destination safely.
I got my record time today on my way to work. It took me 5 minutes to fix a flat without using CO gas.
I did it by not taking the tire and tube out completely from the wheel. With the wheel still intact on the bike frame flipped unside down, I pryed out the tire on one side only. Pulled out the tube halfway out of the tire/wheel, pumped some air and looked for puncture(s).
No puncture found on the 1st half, so stucked the tube back into the tire, pulled out other half of the tube and pumped some air in. Low and behold a piece of needle small metal pierced through the tire. I barely could see the needle outside of the tire, but thankfully I traced it by looking at the tube's puncture. So pulled out the metal with a needle-nose plier and patched up the tube with this Slime Skab,
Put everything back together and pumped as hard as I could with my Topeak Morph G pump. 90 psi tire pressure was achieved in less than a minute. Got back on the road and made it to the office on time.