Revert "Revert "Bit vector are allocated query time and can not take the cost of usin…""
Revert "Revert "Bit vector are allocated query time and can not take the cost of usin…""

vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa