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eiriktsarpalis/test.fsx

Created August 2, 2017 13:59
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Class vs Struct Index Performance
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test.fsx
#time "on"
open System
open System.Collections.Generic
let gdata = [|for i in 1 .. 1000000 -> Guid.NewGuid()|]
let sdata = gdata |> Array.map string
// Real: 00:00:17.774, CPU: 00:00:17.703, GC gen0: 378, gen1: 61, gen2: 1
let gmap = ref Map.empty<Guid, int>
for g in gdata do gmap := gmap.Value.Add(g,42)
// Real: 00:00:05.553, CPU: 00:00:05.843, GC gen0: 157, gen1: 35, gen2: 2
let smap = ref Map.empty<string, int>
for s in sdata do smap := smap.Value.Add(s, 42)
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