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在while循环中，每次循环开始时用uart.readchar()读一次串口，发现加入这一步后出现程序运行卡顿、帧率大幅下降的现象。请问这是为什么，以及有没有既能读串口又能不影响程序正常快速运行的方法？
if uart.any(): uart.readchar()
按照此方法可以解决问题，非常感谢。