  A fast physics analysis framework has been developed based on SNiPER to
process the increasingly large data sample collected by BESIII. In this
framework, a reconstructed event data model with SmartRef is designed to
improve the speed of Input/Output operations, and necessary physics analysis
tools are migrated from BOSS to SNiPER. A real physics analysis $e^{+}e^{-}
\rightarrow \pi^{+}\pi^{-}J/\psi$ is used to test the new framework, and
achieves a factor of 10.3 improvement in Input/Output speed compared to BOSS.
Further tests show that the improvement is mainly attributed to the new
reconstructed event data model and the lazy-loading functionality provided by
SmartRef.
