最原始的写法: 7989f1aa40ca2b5df8425f132abe9f6d000 结果:702-968ms 改进的写法: 7989f1aa40ca2b5df8425f132abe9f6d001 结果:484-600ms 另外一种写法: 7989f1aa40ca2b5df8425f132abe9f6d002 结果:674-826ms...