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iterator block gotcha sample code - F# equivalent

View program.fs
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// Learn more about F# at http://fsharp.net
open System
 
let showMemory( msg : string) =
let memory = GC.GetTotalMemory(true)
Console.WriteLine("{0, -30} {1}", msg + ":", memory)
 
let main ()=
let source = seq {0 .. 1000000}
let query = Seq.distinct source
showMemory("Before Count()")
Seq.length query |> ignore
showMemory("After Count()")
GC.KeepAlive(query)
showMemory("After query eligible for GC")
 
main()
 
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