The benchmarks from the “Retrofitting Effect handlers to OCaml” PLDI 2021 paper ([2104.00250] Retrofitting Effect Handlers onto OCaml) is available here: edit: retro-concurrency/bench at master · prismlab/retro-concurrency · GitHub GitHub - prismlab/retro-concurrency-bench: Microbenchmarks from the PLDI21 paper "Retrofitting Effect Handlers onto OCaml" . See sections 6.2 and 6.3 in the paper.