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// Copyright ©2016 The Gonum Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package distmv
import (
"log"
"testing"
"golang.org/x/exp/rand"
"gonum.org/v1/gonum/mat"
)
func BenchmarkMarginalNormal10(b *testing.B) {
sz := 10
rnd := rand.New(rand.NewSource(1))
normal := randomNormal(sz, rnd)
normal.CovarianceMatrix(&mat.SymDense{}) // pre-compute sigma
b.ResetTimer()
for i := 0; i < b.N; i++ {
marg, ok := normal.MarginalNormal([]int{1}, nil)
if !ok {
b.Error("bad test")
}
_ = marg
}
}
func BenchmarkMarginalNormalReset10(b *testing.B) {
sz := 10
rnd := rand.New(rand.NewSource(1))
normal := randomNormal(sz, rnd)
b.ResetTimer()
for i := 0; i < b.N; i++ {
marg, ok := normal.MarginalNormal([]int{1}, nil)
if !ok {
b.Error("bad test")
}
_ = marg
}
}
func BenchmarkMarginalNormalSingle10(b *testing.B) {
sz := 10
rnd := rand.New(rand.NewSource(1))
normal := randomNormal(sz, rnd)
b.ResetTimer()
for i := 0; i < b.N; i++ {
marg := normal.MarginalNormalSingle(1, nil)
_ = marg
}
}
func randomNormal(sz int, rnd *rand.Rand) *Normal {
mu := make([]float64, sz)
for i := range mu {
mu[i] = rnd.Float64()
}
data := make([]float64, sz*sz)
for i := range data {
data[i] = rnd.Float64()
}
dM := mat.NewDense(sz, sz, data)
var sigma mat.SymDense
sigma.SymOuterK(1, dM)
normal, ok := NewNormal(mu, &sigma, nil)
if !ok {
log.Fatal("bad test, not pos def")
}
return normal
}
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