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我有fread()函数从硬盘中读取一个320*240*3的.rgb图像，所花费的时间实在太长了！
差不多要半个钟头，这到底是怎么回事呀？
simulator因为是通过PC去仿真硬件的行为，所以速度是很慢的，你描述的情况应该属于正常，
在EVM上跑不会要这么多的时间。
