Hi Sebastian, Il 24/06/2013 11:25, Wagner Sebastian ha scritto: > Dear PyTables-Users, > > For testing purposes I use a PyTables DB with 4 columns (1x Uint8 and > 3xFloat) with 750k rows, the total file size about 90MB. As the free version > does no support indexing I thought that a search (full-table) on this > database would last a least one or two seconds, because the file has to be > loaded first (throttleneck I/O), and then the search over ~20k rows can > begin. But PyTables took only 0.05 seconds for a full table search > (in-kernel, so near C-speed, but nevertheless full table), while my bisecting > algorithm with a precomputed sorted list wrapped around PyTables (but saved > in there), took about 0.5 seconds. > > So the thing I don't understand: How can PyTables be so fast without any > Indexing? > > I'm using 3.0.0rc2 coming with WinPython > > Regards, > Sebastian
The indexing features of PyTables Pro are now available in the open source version of PyTables since version 2.3 (please see [1]). [1] http://pytables.github.io/release-notes/RELEASE_NOTES_v2.3.x.html#changes-from-2-2-1-to-2-3 ciao -- Antonio Valentino ------------------------------------------------------------------------------ This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev _______________________________________________ Pytables-users mailing list Pytables-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/pytables-users
