When I completely rebuild OpenCV it takes hours if I use the with CUDA option? Such a block takes long minutes to compile:
My configuration:
- Core i7 laptop
- Nvidia Geforce 630M
- Windows 7 32 bit
- OpenCV 2.4.3
- CUDA 5.0
- MS Visual C++ 2010 Express
I had assumed that it was much faster given my fast CPU. During compilation only 1 out of 8 CPU cores is working, others are almost idle.
What is going on inside the CUDA compilation?
When I tried to stop building it was waiting for some minutes before it really stopped. Compiling a helloword test.cu was normal using nvcc. Similarly compiling Nvidia GPU Computing Toolkit's activity trace example with mingw took some seconds only.
So is it normal that GPU compilation of OpenCV takes so long?