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discard """
file: "tasyncall.nim"
exitcode: 0
"""
import times, sequtils
import asyncdispatch
const
taskCount = 10
sleepDuration = 500
proc futureWithValue(x: int): Future[int] {.async.} =
await sleepAsync(sleepDuration)
return x
proc futureWithoutValue() {.async.} =
await sleepAsync(1000)
proc testFuturesWithValue(x: int): seq[int] =
var tasks = newSeq[Future[int]](taskCount)
for i in 0..<taskCount:
tasks[i] = futureWithValue(x)
result = waitFor all(tasks)
proc testFuturesWithoutValues() =
var tasks = newSeq[Future[void]](taskCount)
for i in 0..<taskCount:
tasks[i] = futureWithoutValue()
waitFor all(tasks)
proc testVarargs(x, y, z: int): seq[int] =
let
a = futureWithValue(x)
b = futureWithValue(y)
c = futureWithValue(z)
result = waitFor all(a, b, c)
block:
let
startTime = cpuTime()
results = testFuturesWithValue(42)
expected = repeat(42, taskCount)
execTime = cpuTime() - startTime
doAssert execTime * 1000 < taskCount * sleepDuration
doAssert results == expected
block:
let startTime = cpuTime()
testFuturesWithoutValues()
let execTime = cpuTime() - startTime
doAssert execTime * 1000 < taskCount * sleepDuration
block:
let
startTime = cpuTime()
results = testVarargs(1, 2, 3)
expected = @[1, 2, 3]
execTime = cpuTime() - startTime
doAssert execTime * 100 < taskCount * sleepDuration
doAssert results == expected
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