Streaming Search For Unindexed Data

AI + Data, online. https://vespa.ai

Unique: Uses the Visitor Framework to scan stored documents and apply ranking expressions at query time, avoiding index construction overhead. This enables search over unindexed data with the same ranking pipeline as indexed search, trading latency for flexibility.

vs others: More flexible than indexed search for rapidly-changing data because no index maintenance is required, making it suitable for datasets with high churn where index rebuild cost exceeds search benefit.