Max Shutter speed
Canon 100D can shoot continuously at max speed of
3 fps and has max shutter speed of
1/4000 sec.
Flash
100D has a built-in flash, and it also has a flash shoe to mount your external flashes too.
Focusing
Canon 100D features both Contrast Detection and Phase Detection autofocus (AF) systems which ensures speed and accuracy of focusing in most situations. The AF system has 9 focus points and 1 of these sensors are of Cross-type. Cross-type sensors locks focus faster and more accurate compared to single type sensors.
Canon 100D also features
Face detection AF where it intelligently detects the faces in the frame and locks the focus automatically.
User Manual
You can download Canon 100D's User Manual here