You want to give it a lot of gas when you do the sudden turn so that you lose grip and start the sliding, the best way to practice is in a big flat empty parking lot and set up cones to drift around. Then you are less likely to damage your car on obstacles.
Because when I was a kid playing burnout I thought it was always faster to drift around the corner. But replaying it now heavy breaking and accelerating through the curve is faster.
Drifting is slower in almost every case. Fastest way through a turn depends on the turn and surrounding road, as well as your car's handling and drivetrain
If your tires don't have traction you are losing potential acceleration. Hairpins on loose surface are a slightly different situation, the Rally driver uses the lack of traction to aim the car ready for acceleration out of corner, keeping the engine revs up in the power/torque zone so there is no bogging down like there would be with full braking, then starting