Using the N900 GPU for image processing rather than rendering

GPU-based computing has become more and more popular over the past few years due, in part, to many advances in the technology put into building modern graphics processing units. These changes haven't been limited to the desktop space, and work is now ongoing to leverage the PowerVR SGX 530 in the N900's OMAP3430 for general computing task: The shader code itself is somewhat complex, but nothing extraordinary. And I am happy with performance of the shader but the time required to compile this particular shader source code on N900 is ridiculous 90 sec!