Comparing quantization strategies
When comparing different quantization strategies, each approach offers distinct advantages and challenges, which can be measured through factors such as implementation complexity, accuracy preservation, performance impact, and resource requirements.
In terms of implementation complexity, PTQ is the simplest to execute, requiring minimal additional work beyond the training of the original model. Dynamic quantization is more complex, as it involves more runtime considerations due to the dynamic handling of activations. Mixed-precision quantization introduces more complexity since it requires a granular, layer-by-layer assessment of precision sensitivity and potentially custom kernel development for optimized execution. QAT ranks as the most complex, requiring the integration of fake quantization nodes into the training graph and extended training times to account for the noise introduced by quantization.
When it comes to accuracy preservation,...