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why is GPU version is slower than CPU version? #11

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duwangthefirst opened this issue Jul 28, 2021 · 1 comment

duwangthefirst commented Jul 28, 2021

I've run the demo and find that the object detection process runs faster with option "CPU" instead of "GPU".
Is this NORMAL ?
I 'm using:

ncnn_20210720_android_vulkan
opencv_mobile_4_5_3_android
gradle 6.7.1
gradle plugin 4.2.2

Owner

nihui commented Jul 28, 2021

https://github.com/nihui/ncnn-android-nanodet#some-notes

Most small models run slower on GPU than on CPU, this is common

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