Fread performance is slow. Why?

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Ecem Çetinyol 2019-7-8

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https://ww2.mathworks.cn/matlabcentral/answers/470658-fread-performance-is-slow-why

评论： Walter Roberson 2019-7-9

Hello, i have a problem about fread. I don’t have any problem for fwrite but fread command is slower than it should be. How can i solve this problem?

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Jan 2019-7-9

Then the performance of fread depends on the speed of the transmitted data. So this is most likely either a problem of the Baud value used at opening the port, or it is a limitation of the sender. To check this, post any details: 1. the code you are using, 2. details about the connected device.

The lack of details let the readers of the forum guess, what your problem is, and this is inefficient.

Walter Roberson 2019-7-9

Is it a true serial port, or is it serial over USB? Serial over USB is limited to 1000 USB packets per second in the most common situations. Best performance is with sending approximately 1000 bytes per packet, and making sure that you have increased your serial port buffer sizes.

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