[Haskell-cafe] Monad transformer performance - Request to review benchmarking code + results

Hi, I was noticing severe drop in performance when Lucid's HtmlT was being combined with Scotty's ActionT. I've tried putting together a minimal repro at https://github.com/vacationlabs/monad-transformer-benchmark Request someone with better knowledge of benchmarking to check if the benchmarking methodology is correct. Is my reading of 200ms performance penalty correct? -- Saurabh.