By making use of memory-mapped I/O, the current trunk of SQLite (which will eventually become version 3.7.17 after much more refinement and testing) can be as much as twice as fast, on some platforms and under some workloads. We would like to encourage people to try out the new code and report both success and failure. Snapshots of the amalgamation can be found at
http://www.sqlite.org/draft/download.html Links to the relevant documentation can bee seen at http://www.sqlite.org/draft/releaselog/3_7_17.html The memory-mapped I/O is only enabled for windows, linux, mac OS-X, and solaris. We have found that it does not work on OpenBSD, for reasons we have not yet been able to uncove; but as a precaution, memory mapped I/O is disabled by default on all of the *BSDs until we understand the problem. The biggest performance gains occur on windows, mac, and solaris. The new code is also faster on linux, but not by as big a factor. The speed improvement is also heavily dependent upon workload. Some operations can be almost twice as faster. For others, there is no measurable speed improvement. Your feedback on whether or not the new code is faster for you, and whether or not it even works for you, is very important to us. Thanks for giving the new code a try. -- D. Richard Hipp d...@sqlite.org _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
