Query Log for Zen Cart is open source, simple tool for monitoring performance of SQL queries. Depending on configuration it will display or save all executed queries sent to database together with information how much time each query took and which page and session executed it. With Query Log and some SQL knowledge You can [...]

Performance, Query Log, screencast, Zen Cart

Update: Query Cache V1.6 has been released – read here
Query Cache is free, in memory cache designed to work with Zen Cart. It can reduce number of queries sent to database by over 80% (see charts below). Thus, Query Cache  might greatly reduce query execution time and response time of most Zen Cart stores.
You might [...]

Performance, Query Cache, screencast, Speed, Zen Cart