Are there any known benchmarks/statistics on UnQLite?
I have found some information and pointers here. Extracts from that thread:


  ...retrieved records from a given collection a parsed only once (FastJSON) and cached in-memory for fast retrieval. The cache is a O(1) hashtable so performance shouldn't be a problem.
  
  ...only the first retrieval is a little bit slower than the others since it involve a disk access (In case you are working with an on-disk DB) and a preprocessing phase (FastJSON decoding) while later fetches are in-memory operations only with no decoding overhead.
  
  My Observations about document storage in UnQlite :
  
  In memory: Store faster, search slower ;But both slower than SQLite!
  In File: Store slower, search faster  
  
  e.g:- For same data, In UnQLite:
  
  In mem: store: 901.9 ms, search: 2586 ms
  In Local disk: store: 15223.3 ms , search: 114.2 ms
  
  SQLite:
  In mem: Store 9507 ms , Search : 105 ms
  
  Honestly, I haven't benchmarked SQLite indexes with UnQLite doc store. But, keep in mind that UnQLite is shipped with a disk KV storage engine that support nearly O(1) record retrieval.


The information given lacks specifics and context - nothing how the tests were conducted. Yet I believe it's enough to construct myself a vague opinion.

To me it seem that UnQLite has faster write but slower read performance, in relation to SQLite. It is probably a general trend when comparing SQL with NoSQL database systems.