Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Add varopt benchmarks #10

Merged
merged 2 commits into from
Nov 9, 2019
Merged
Changes from all commits
Commits
File filter

Filter by extension

Filter by extension

Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
72 changes: 72 additions & 0 deletions benchmark_test.go
Original file line number Diff line number Diff line change
@@ -0,0 +1,72 @@
// Copyright 2019, LightStep Inc.
//
// The benchmark results point to a performance drop when the
// largeHeap starts to be used because of interface conversions in and
// out of the heap, primarily due to the heap interface. This
// suggests room for improvement by avoiding the built-in heap.

/*
BenchmarkAdd_Norm_100-8 37540165 32.1 ns/op 8 B/op 0 allocs/op
BenchmarkAdd_Norm_10000-8 39850280 30.6 ns/op 8 B/op 0 allocs/op
BenchmarkAdd_Norm_1000000-8 7958835 183 ns/op 52 B/op 0 allocs/op
BenchmarkAdd_Exp_100-8 41565934 28.5 ns/op 8 B/op 0 allocs/op
BenchmarkAdd_Exp_10000-8 43622184 29.2 ns/op 8 B/op 0 allocs/op
BenchmarkAdd_Exp_1000000-8 8103663 220 ns/op 55 B/op 0 allocs/op
*/

package varopt_test

import (
"math"
"math/rand"
"testing"

"github.com/lightstep/varopt"
)

func normValue(rnd *rand.Rand) float64 {
return 1 + math.Abs(rnd.NormFloat64())
}

func expValue(rnd *rand.Rand) float64 {
return rnd.ExpFloat64()
}

func BenchmarkAdd_Norm_100(b *testing.B) {
benchmarkAdd(b, 100, normValue)
}

func BenchmarkAdd_Norm_10000(b *testing.B) {
benchmarkAdd(b, 10000, normValue)
}

func BenchmarkAdd_Norm_1000000(b *testing.B) {
benchmarkAdd(b, 1000000, normValue)
}

func BenchmarkAdd_Exp_100(b *testing.B) {
benchmarkAdd(b, 100, expValue)
}

func BenchmarkAdd_Exp_10000(b *testing.B) {
benchmarkAdd(b, 10000, expValue)
}

func BenchmarkAdd_Exp_1000000(b *testing.B) {
benchmarkAdd(b, 1000000, expValue)
}

func benchmarkAdd(b *testing.B, size int, f func(rnd *rand.Rand) float64) {
b.ReportAllocs()
rnd := rand.New(rand.NewSource(3331))
v := varopt.New(size, rnd)
weights := make([]float64, b.N)
for i := 0; i < b.N; i++ {
weights[i] = f(rnd)
}

b.StartTimer()
for i := 0; i < b.N; i++ {
v.Add(nil, weights[i])
}
}