Implement a first 4-ary trie to represent posting lists #37
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This is our base-line implementation.
Fastest results are achieved with 32 bytes per block which results in a 12.5% overhead. 64 bytes per block seems like a reasonable compromise between speed and memory overhead (6.25%).
…ss from scratch. Instead, we check whether the access still belongs within the same word that we cache locally.
add quaternary parallel implementation (~50ns vs. ~80ns for binary).
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