This post suggests that Stack Overflow has about 30,000 distinct tags, which seems like a good fit for a bitmap index: https://mattwarren.org/2015/08/19/the-st

This post suggests that Stack Overflow has about 30,000 distinct tags, which seems like a good fit for a bitmap index: https://mattwarren.org/2015/08/19/the-stack-overflow-tag-engine-part-2/ https://mattwarren.org/2015/08/19/the-stack-overflow-tag-eng... Not that that's the whole solution, but certainly something I'd look into before digging into CUDA.