We've published an update to VistaDB 5.1 with a new optimizer and faster storage layer for dramatic performance improvements for just about every operation. You can download it immediately here:
It's a big performance jump, backed up by more performance testing with more elaborate queries than we've ever done before. Thanks to the folks in the VistaDB community that gave feedback on the betas- they found some great cases that we were able to address and make VistaDB better than ever before. Read up on the performance improvements in VistaDB 5.1 Released with Big Performance Improvements.