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|
//===--- RandomValues.swift -----------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2018 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
import TestsUtils
//
// Benchmark generating lots of random values. Measures the performance of
// the default random generator and the algorithms for generating integers
// and floating-point values.
//
public let benchmarks = [
BenchmarkInfo(name: "RandomIntegersDef", runFunction: run_RandomIntegersDef,
tags: [.api], legacyFactor: 100),
BenchmarkInfo(name: "RandomIntegersLCG", runFunction: run_RandomIntegersLCG,
tags: [.api]),
BenchmarkInfo(name: "RandomInt8Def", runFunction: run_RandomInt8Def,
tags: [.api], legacyFactor: 100),
BenchmarkInfo(name: "RandomInt8LCG", runFunction: run_RandomInt8LCG,
tags: [.api]),
BenchmarkInfo(name: "RandomInt64Def", runFunction: run_RandomInt64Def,
tags: [.api], legacyFactor: 100),
BenchmarkInfo(name: "RandomInt64LCG", runFunction: run_RandomInt64LCG,
tags: [.api]),
BenchmarkInfo(name: "RandomDoubleDef", runFunction: run_RandomDoubleDef,
tags: [.api], legacyFactor: 100),
BenchmarkInfo(name: "RandomDoubleLCG", runFunction: run_RandomDoubleLCG,
tags: [.api]),
BenchmarkInfo(name: "RandomDoubleOpaqueDef", runFunction: run_RandomDoubleOpaqueDef,
tags: [.api], legacyFactor: 100),
BenchmarkInfo(name: "RandomDoubleOpaqueLCG", runFunction: run_RandomDoubleOpaqueLCG,
tags: [.api]),
BenchmarkInfo(name: "RandomDouble01Def", runFunction: run_RandomDouble01Def,
tags: [.api], legacyFactor: 100),
BenchmarkInfo(name: "RandomDouble01LCG", runFunction: run_RandomDouble01LCG,
tags: [.api]),
]
/// A linear congruential PRNG.
struct LCRNG: RandomNumberGenerator {
private var state: UInt64
init(seed: Int) {
state = UInt64(truncatingIfNeeded: seed)
for _ in 0..<10 { _ = next() }
}
mutating func next() -> UInt64 {
state = 2862933555777941757 &* state &+ 3037000493
return state
}
}
@inline(never)
public func run_RandomIntegersDef(_ n: Int) {
for _ in 0 ..< n {
var x = 0
for _ in 0 ..< 1_000 {
x &+= .random(in: 0...10_000)
}
blackHole(x)
}
}
@inline(never)
public func run_RandomIntegersLCG(_ n: Int) {
for _ in 0 ..< n {
var x = 0
var generator = LCRNG(seed: 0)
for _ in 0 ..< 100_000 {
x &+= .random(in: 0 ... 10_000, using: &generator)
}
blackHole(x)
}
}
@inline(never)
public func run_RandomInt8Def(_ n: Int) {
for _ in 0 ..< n {
var x: Int8 = 0
for _ in 0 ..< 1_000 {
x &+= .random(in: -65 ... identity(65))
}
blackHole(x)
}
}
@inline(never)
public func run_RandomInt8LCG(_ n: Int) {
for _ in 0 ..< n {
var x: Int8 = 0
var generator = LCRNG(seed: 0)
for _ in 0 ..< 100_000 {
x &+= .random(in: -65 ... identity(65), using: &generator)
}
blackHole(x)
}
}
@inline(never)
public func run_RandomInt64Def(_ n: Int) {
for _ in 0 ..< n {
var x: Int64 = 0
for _ in 0 ..< 1_000 {
x &+= .random(in:
-5_000_000_000_000_000_000 ... identity(5_000_000_000_000_000_000)
)
}
blackHole(x)
}
}
@inline(never)
public func run_RandomInt64LCG(_ n: Int) {
for _ in 0 ..< n {
var x: Int64 = 0
var generator = LCRNG(seed: 0)
for _ in 0 ..< 100_000 {
x &+= .random(in:
-5_000_000_000_000_000_000 ... identity(5_000_000_000_000_000_000),
using: &generator
)
}
blackHole(x)
}
}
@inline(never)
public func run_RandomDoubleDef(_ n: Int) {
for _ in 0 ..< n {
var x = 0.0
for _ in 0 ..< 1_000 {
x += .random(in: -1000 ... 1000)
}
blackHole(x)
}
}
@inline(never)
public func run_RandomDoubleLCG(_ n: Int) {
for _ in 0 ..< n {
var x = 0.0
var generator = LCRNG(seed: 0)
for _ in 0 ..< 100_000 {
x += .random(in: -1000 ... 1000, using: &generator)
}
blackHole(x)
}
}
@inline(never)
public func run_RandomDoubleOpaqueDef(_ n: Int) {
for _ in 0 ..< n {
var x = 0.0
for _ in 0 ..< 1_000 {
x += .random(in: -1000 ... identity(1000))
}
blackHole(x)
}
}
@inline(never)
public func run_RandomDoubleOpaqueLCG(_ n: Int) {
for _ in 0 ..< n {
var x = 0.0
var generator = LCRNG(seed: 0)
for _ in 0 ..< 100_000 {
x += .random(in: -1000 ... identity(1000), using: &generator)
}
blackHole(x)
}
}
@inline(never)
public func run_RandomDouble01Def(_ n: Int) {
for _ in 0 ..< n {
var x = 0.0
for _ in 0 ..< 1_000 {
x += .random(in: 0 ..< 1)
}
blackHole(x)
}
}
@inline(never)
public func run_RandomDouble01LCG(_ n: Int) {
for _ in 0 ..< n {
var x = 0.0
var generator = LCRNG(seed: 0)
for _ in 0 ..< 100_000 {
x += .random(in: 0 ..< 1, using: &generator)
}
blackHole(x)
}
}
|
