Python pyinstaller execution questions

Hello, everyone pyinstaller has a problem with compiling and running, so I'm asking you a question

def main():
    while True:
        start_time = time.time()
        pool = Pool(2)
        pool.map(GetPage, range(1,b+1)) 
        pool.close()
        pool.join()
        print("--- %s seconds ---"%(time.time() - start_time)))

if __name__ == '__main__':
     main()

I had to import page information repeatedly like this, so I had to repeat it with while When running in Visual Studio Code The pool disappears as you want, and works well. When you compile and run it, pool appears as infinite and the computer stops What is the problem?