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Fibonacci.fs
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Fibonacci.fs
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module Fibonacci
/////////////////////////////////////////////////////////////////////////
open Hopac
open Hopac.Infixes
open System
open System.Threading
open System.Threading.Tasks
open System.Diagnostics
/////////////////////////////////////////////////////////////////////////
let mutable numSpawns = 0L
module SerialFun =
let rec fib n =
if n < 2L then
n
else
numSpawns <- numSpawns + 1L
fib (n-2L) + fib (n-1L)
let run n =
numSpawns <- 0L
printf "SerFun: "
let timer = Stopwatch.StartNew ()
let r = fib n
let d = timer.Elapsed
printf "%d - %fs (%d recs)\n" r d.TotalSeconds numSpawns
/////////////////////////////////////////////////////////////////////////
module SerialJob =
let rec fib n = job {
if n < 2L then
return n
else
let! x = fib (n-2L)
let! y = fib (n-1L)
return x + y
}
let run n =
printf "SerJob: "
let timer = Stopwatch.StartNew ()
let r = run (fib n)
let d = timer.Elapsed
printf "%d - %fs\n" r d.TotalSeconds
/////////////////////////////////////////////////////////////////////////
module SerialOpt =
let rec fib n =
if n < 2L then
Job.result n
else
fib (n-2L) >>= fun x ->
fib (n-1L) >>- fun y ->
x + y
let run n =
printf "SerOpt: "
let timer = Stopwatch.StartNew ()
let r = run (fib n)
let d = timer.Elapsed
printf "%d - %fs\n" r d.TotalSeconds
/////////////////////////////////////////////////////////////////////////
module ParallelJob =
let rec fib n = job {
if n < 2L then
return n
else
let! (x, y) = fib (n-2L) <*> fib (n-1L)
return x + y
}
let run n =
printf "ParJob: "
let timer = Stopwatch.StartNew ()
let r = run (fib n)
let d = timer.Elapsed
printf "%d - %fs (%f jobs/s)\n"
r d.TotalSeconds (float numSpawns / d.TotalSeconds)
/////////////////////////////////////////////////////////////////////////
module ParallelPro =
let rec fib n =
if n < 2L then
Job.result n
else
fib (n-2L) |> Promise.start >>= fun xP ->
fib (n-1L) >>= fun y ->
xP >>- fun x ->
x + y
let run n =
printf "ParPro: "
let timer = Stopwatch.StartNew ()
let r = run (fib n)
let d = timer.Elapsed
printf "%d - %fs (%f jobs/s)\n"
r d.TotalSeconds (float numSpawns / d.TotalSeconds)
/////////////////////////////////////////////////////////////////////////
module ParallelOpt =
let rec fib n =
if n < 2L then
Job.result n
else
fib (n-2L) <*> Job.delayWith fib (n-1L) >>- fun (x, y) ->
x + y
let run n =
printf "ParOpt: "
let timer = Stopwatch.StartNew ()
let r = run (fib n)
let d = timer.Elapsed
printf "%d - %fs (%f jobs/s)\n"
r d.TotalSeconds (float numSpawns / d.TotalSeconds)
/////////////////////////////////////////////////////////////////////////
module SerAsc =
let rec fib n = async {
if n < 2L then
return n
else
let! x = fib (n-2L)
let! y = fib (n-1L)
return x + y
}
let run n =
printf "SerAsc: "
let timer = Stopwatch.StartNew ()
let r = Async.RunSynchronously (fib n)
let d = timer.Elapsed
printf "%d - %fs\n" r d.TotalSeconds
/////////////////////////////////////////////////////////////////////////
module ParAsc =
let rec fib n = async {
if n < 2L then
return n
else
let! x = Async.StartChild (fib (n-2L))
let! y = fib (n-1L)
let! x = x
return x + y
}
let run n =
printf "ParAsc: "
let timer = Stopwatch.StartNew ()
let r = Async.RunSynchronously (fib n)
let d = timer.Elapsed
printf "%d - %fs\n" r d.TotalSeconds
/////////////////////////////////////////////////////////////////////////
module Task =
let rec fib n =
if n < 2L then
n
else
let x = Task.Factory.StartNew (fun _ -> fib (n-2L))
let y = fib (n-1L)
x.Result + y
let run n =
printf "ParTsk: "
let timer = Stopwatch.StartNew ()
let r = fib n
let d = timer.Elapsed
printf "%d - %fs (%f tasks/s)\n"
r d.TotalSeconds (float numSpawns / d.TotalSeconds)
/////////////////////////////////////////////////////////////////////////
module FibNck =
let rec fibWithNack (n: int64) (cancel: Alt<int64>) : Job<int64> =
if n < 2L then
Job.result n
else
Promise.queue (fibWithNack (n-2L) cancel) >>= fun xP ->
Promise.start (fibWithNack (n-1L) cancel) >>= fun yP ->
cancel
<|> xP ^=> fun x -> cancel <|> yP ^-> fun y -> x+y
<|> yP ^=> fun y -> cancel <|> xP ^-> fun x -> x+y
let fib n =
Alt.withNackJob <| fun nack ->
Promise.start (fibWithNack n (nack ^->. 0L))
let run n =
printf "FibNck: "
let timer = Stopwatch.StartNew ()
let r = run (fib n)
let d = timer.Elapsed
printf "%d - %fs\n" r d.TotalSeconds
/////////////////////////////////////////////////////////////////////////
let inline isMono () =
match Type.GetType "Mono.Runtime" with
| null -> false
| _ -> true
let cleanup () =
for i=1 to 2 do
GC.Collect ()
GC.WaitForPendingFinalizers ()
do for n in [10L; 20L; 30L; 40L] do
SerialFun.run n ; cleanup ()
ParallelOpt.run n ; cleanup ()
ParallelJob.run n ; cleanup ()
ParallelPro.run n ; cleanup ()
Task.run n ; cleanup ()
SerialOpt.run n ; cleanup ()
SerialJob.run n ; cleanup ()
FibNck.run n ; cleanup ()
SerAsc.run n ; cleanup ()
if n <= 30L then
ParAsc.run n ; cleanup ()