-
InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
-
OpenFrameworks
openFrameworks is a community-developed cross platform toolkit for creative coding in C++.
Going parallel on the GPU is where you see these massive performance increases. OpenGL's GLSL shader pipeline is great for that, but if you decide to build up your own OpenGL back-end from scratch it's a steep learning curve. It's really well documented though. I would recommend SDL2 + GLAD for window management, context creation, and extension wrangling.
As someone who went down the C++/OpenGL/GLSL route after hitting the performance wall with Processing in Python I can say that you can definitely achieve the performance you want. OpenGL and GLSL are absolutely still relevant. I would say that going shader-based is "the future", and OpenGL (and computer graphics in general) have made that transition a long time ago. Seems like OpenGL has suddenly got this reputation of being archaic and I'm not really sure why...
you might want to look into openFrameworks (C++) website: https://openframeworks.cc/