Scoped effects as described by Wu et al are a powerful addition to algebraic effect systems in Haskell, but there is currently no effect system in Haskell that has both the power of scoped effects and an efficient implementation. We demonstrate how the efficient evidence-passing style of effect system implementation by Xie and Leijen can be altered to support scoped effects. We present our implementation of this idea, SpEff, providing usage examples, interesting design choices, and benchmark results, in which it performs better than EvEff in Xie and Leijen, as well as other popular effect systems. We also talk about the limitations of evidence-passing style in current GHC Haskell.