WDF Bakeoff

Comparing performance between Wave Digital Filters implemented in C++ and Faust.

Building

First clone the repository and submodules:

git clone https://github.com/jatinchowdhury18/wdf-bakeoff
cd wdf-bakeoff
git submodule update --init --recursive

Next, build with CMake:

cmake -Bbuild
cmake --build build --config Release

Finally, run the tool:

./build/wdf-bakeoff --help

Results

The table below shows the time taken to process 100 seconds of audio at 192 kHz sample rate, as well as the "real-time" ratio (seconds of audio per second of processing time). The C++ columns are for the C++ implementation using tempaltes, while the C++ poly measurements are for the C++ implementation with run-time polymorphism.

Circuit	Faust (time)	Faust (ratio)	C++ (time)	C++ (ratio)	C++ poly (time)	C++ poly (ratio)
LPF	0.47	211.5	0.21	470.7	0.81	123.3
FF2	1.05	94.9	1.56	64.3	3.07	32.6
Diode Clipper	3.60	27.8	0.47	214.2	0.62	160.7