Pixel Nano
Pixel Nano is a minimalist renderer. It works just like Pixel, except it runs on the main thread, doesn't support fancy features like tiling, dynamic resolution or infinite zoom, and doesn't scale as well for large problems.
However because there's much less overhead to run Pixel Nano, you might find that for smaller problems, it looks and performs better.
Getting Pixel Nano
Pixel Nano is bundled with Posthoc, but not enabled by default.
To enable Pixel Nano, add Pixel Nano's URL to the Renderers list in Posthoc's settings. Then, select Pixel Nano as the renderer for a viewport:
API
Primitives
Pixel Nano supports the same primitives as Pixel. See here.