Persevere: The JSON database and JavaScript application server
http://www.persvr.org/
SitePen Blog » JavaScriptDB: Persevere’s New High-Performance Storage Engine
http://www.sitepen.com/blog/2009/04/20/javascriptdb-perseveres-new-high-performance-storage-engine/

JavaScriptDB: Persevere’s New High-Performance Storage Engine April 20th, 2009 at 8:47 pm by Kris Zyp The latest beta of Persevere features a new native object storage engine called JavaScriptDB that provides high-end scalability and performance. Persevere now outperforms the common PHP and MySQL combination for accessing data via HTTP by about 40% and outperforms CouchDB by 249%. The new storage engine is designed and optimized specifically for persisting JavaScript and JSON data with dynamic object structures. It is also built for extreme scalability, with support for up to 9,000 petabytes of JSON/JS data in addition to any binary data.