方式1（低端設備有效）：
使用方法：
代碼：
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復制上面的代碼內容發送給你的好友，他查看消息的時候就會卡死。
原理解析：
“oo0.oo.OOO00.”這種字符會消耗GPU繪制性能。
方式2（所有設備都會卡死）：
使用方法：
代碼：
這是一條不可復制的消息！
復制上面的代碼內容發送給你的好友，他敢復制這條消息便會卡死。
原理解析：
這串文本內容中含有隱藏的Unicode控制字符，並且是很長的一串字符（見下圖）。一般的應用程序的字符顯示編碼為UTF-8，UTF-8編碼下無法顯示這些Unicode控制字符，像是隱藏了似的。看起來就一句話 其實是字節很多的內容，通過大量的字節可以使處理字符的API發生延遲，最終造成應用程序假死。
以ANSI編碼查看：
以UTF-8編碼查看：
