Adding blobs binary search index to PBF

Two random things come to mind here:

  1. In tilemaker when reading PBF files @cldellow is building a kind of index on the fly. Have a look at
    Alternative protobuf library? · systemed/tilemaker · Discussion #621 · GitHub.
  2. Look at this proposal which would create larger blocks making your index less efficient: Pbf-reblob: Reduce PBF file sizes (without loosing data)