Hi All. I updated the recently discussed RTL example to demonstrate the performance gain that can be achieved by using the RTL transaction mechanism. The original query, that involves a self-join of the ~20,000 row table on a complex condition, currently takes ~79 sec. on my setup (1.5 Ghz, MinGW, g++ -O2). Then a record is removed from the table, which invalidates all the indexes built by that point. The transaction commit repairs indexes, and the query is re-run. Update, commit, and re-run together take just 1 sec. Please take the example and the updated library (again, a few performance issues were fixed) at the usual location: http://www.boost-consulting.com/vault/index.php?&direction=0&order=&director y=RTL Please note that the directory structure of the library has been "boostified" so please ajust you include path accordingly (although I haven't yet put "boost/rtl" into #include statements, so it should go into the include path for now). Regards, Arkadiy