what kind of index is Gigablast using? traditional inverted index like Lucene or something more esoteric? I know Google and Bing both use weird data-structure

what kind of index is Gigablast using? traditional inverted index like Lucene or something more esoteric? I know Google and Bing both use weird data-structure like BitFunnel https://www.microsoft.com/en-us/research/publication/bitfunnel-revisiting-signatures-search/ https://www.microsoft.com/en-us/research/publication/bitfunn...