mirror of git://gcc.gnu.org/git/gcc.git
65 lines
2.2 KiB
Go
65 lines
2.2 KiB
Go
// Copyright 2012 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// This file implements a GCD benchmark.
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// Usage: go test math/big -test.bench GCD
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package big
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import (
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"math/rand"
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"testing"
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)
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// randInt returns a pseudo-random Int in the range [1<<(size-1), (1<<size) - 1]
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func randInt(r *rand.Rand, size uint) *Int {
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n := new(Int).Lsh(intOne, size-1)
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x := new(Int).Rand(r, n)
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return x.Add(x, n) // make sure result > 1<<(size-1)
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}
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func runGCD(b *testing.B, aSize, bSize uint) {
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if isRaceBuilder && (aSize > 1000 || bSize > 1000) {
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b.Skip("skipping on race builder")
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}
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b.Run("WithoutXY", func(b *testing.B) {
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runGCDExt(b, aSize, bSize, false)
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})
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b.Run("WithXY", func(b *testing.B) {
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runGCDExt(b, aSize, bSize, true)
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})
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}
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func runGCDExt(b *testing.B, aSize, bSize uint, calcXY bool) {
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b.StopTimer()
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var r = rand.New(rand.NewSource(1234))
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aa := randInt(r, aSize)
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bb := randInt(r, bSize)
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var x, y *Int
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if calcXY {
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x = new(Int)
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y = new(Int)
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}
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b.StartTimer()
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for i := 0; i < b.N; i++ {
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new(Int).GCD(x, y, aa, bb)
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}
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}
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func BenchmarkGCD10x10(b *testing.B) { runGCD(b, 10, 10) }
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func BenchmarkGCD10x100(b *testing.B) { runGCD(b, 10, 100) }
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func BenchmarkGCD10x1000(b *testing.B) { runGCD(b, 10, 1000) }
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func BenchmarkGCD10x10000(b *testing.B) { runGCD(b, 10, 10000) }
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func BenchmarkGCD10x100000(b *testing.B) { runGCD(b, 10, 100000) }
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func BenchmarkGCD100x100(b *testing.B) { runGCD(b, 100, 100) }
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func BenchmarkGCD100x1000(b *testing.B) { runGCD(b, 100, 1000) }
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func BenchmarkGCD100x10000(b *testing.B) { runGCD(b, 100, 10000) }
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func BenchmarkGCD100x100000(b *testing.B) { runGCD(b, 100, 100000) }
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func BenchmarkGCD1000x1000(b *testing.B) { runGCD(b, 1000, 1000) }
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func BenchmarkGCD1000x10000(b *testing.B) { runGCD(b, 1000, 10000) }
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func BenchmarkGCD1000x100000(b *testing.B) { runGCD(b, 1000, 100000) }
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func BenchmarkGCD10000x10000(b *testing.B) { runGCD(b, 10000, 10000) }
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func BenchmarkGCD10000x100000(b *testing.B) { runGCD(b, 10000, 100000) }
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func BenchmarkGCD100000x100000(b *testing.B) { runGCD(b, 100000, 100000) }
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