benchmark update

Closes #51 (closed)

benchmark/Project.toml

+[deps]
+BenchmarkTools = "6e4b80f9-dd63-53aa-95a3-0cdb28fa8baf"
+CSV = "336ed68f-0bac-5ca0-87d4-7b16caf5d00b"
+CUDA = "052768ef-5323-5732-b1bb-66c8b64840ba"
+DataFrames = "a93c6f00-e57d-5684-b7b6-d8193f3e46c0"
+Glob = "c27321d9-0574-5035-807b-f59d2c89b15c"
+IterTools = "c8e1da08-722c-5040-9ed9-7db0dc04731e"
+LogExpFunctions = "2ab3a3ac-af41-5b50-aa03-7779005ae688"
+NaNStatistics = "b946abbf-3ea7-4610-9019-9858bfdeaf2d"
+OpenFst = "3e215157-cce3-4b04-a8eb-cbfb077f1dc8"
+Pluto = "c3e4b0f8-55cb-11ea-2926-15256bba5781"
+Revise = "295af30f-e4ad-537b-8983-00126c2a3abe"
+Semirings = "900aad66-9ca5-44d4-b043-321c62cb7767"
+SparseArrayKit = "a9a3c162-d163-4c15-8926-b8794fbefed2"
+SumSparseTensors = "472dc678-8c5a-4778-a6eb-28a4e9c7cb58"
+TensorFSTs = "9f8e39db-0d6b-46cc-a14d-daf437028eec"
+Tullio = "bc48ee85-29a4-5162-ae0b-a64e1601d4bc"