Remove the lowercase conversion and optimize the kill logic.

Remove the lowercase conversion and optimize the kill logic.

add log for debug

add log for debug

remove log

Use a map to solve the problem of slow checks and stops

Use a map to solve the problem of slow checks and stops

Use a map to solve the problem of slow checks and stops

The "check" and "stop" functions are too slow; add logging.

The "check" and "stop" functions are too slow; add logging.