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term_bench_test.go
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/
term_bench_test.go
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// Copyright 2017 The OPA Authors. All rights reserved.
// Use of this source code is governed by an Apache2
// license that can be found in the LICENSE file.
package ast
import (
"encoding/json"
"fmt"
"math/rand"
"strings"
"testing"
"time"
)
func BenchmarkObjectLookup(b *testing.B) {
sizes := []int{5, 50, 500, 5000}
for _, n := range sizes {
b.Run(fmt.Sprint(n), func(b *testing.B) {
obj := NewObject()
for i := 0; i < n; i++ {
obj.Insert(StringTerm(fmt.Sprint(i)), IntNumberTerm(i))
}
key := StringTerm(fmt.Sprint(n - 1))
b.ResetTimer()
for i := 0; i < b.N; i++ {
value := obj.Get(key)
if value == nil {
b.Fatal("expected hit")
}
}
})
}
}
func BenchmarkObjectCreationAndLookup(b *testing.B) {
sizes := []int{5, 50, 500, 5000, 50000, 500000}
for _, n := range sizes {
b.Run(fmt.Sprint(n), func(b *testing.B) {
obj := NewObject()
for i := 0; i < n; i++ {
obj.Insert(StringTerm(fmt.Sprint(i)), IntNumberTerm(i))
}
key := StringTerm(fmt.Sprint(n - 1))
for i := 0; i < b.N; i++ {
value := obj.Get(key)
if value == nil {
b.Fatal("expected hit")
}
}
})
}
}
func BenchmarkSetIntersection(b *testing.B) {
sizes := []int{5, 50, 500, 5000}
for _, n := range sizes {
b.Run(fmt.Sprint(n), func(b *testing.B) {
setA := NewSet()
setB := NewSet()
for i := 0; i < n; i++ {
setA.Add(IntNumberTerm(i))
setB.Add(IntNumberTerm(i))
}
b.ResetTimer()
for i := 0; i < b.N; i++ {
setC := setA.Intersect(setB)
if setC.Len() != setA.Len() || setC.Len() != setB.Len() {
b.Fatal("expected equal")
}
}
})
}
}
func BenchmarkSetIntersectionDifferentSize(b *testing.B) {
sizes := []int{4, 50, 500, 5000}
for _, n := range sizes {
b.Run(fmt.Sprint(n), func(b *testing.B) {
setA := NewSet()
setB := NewSet()
for i := 0; i < n; i++ {
setA.Add(IntNumberTerm(i))
}
for i := 0; i < sizes[0]; i++ {
setB.Add(IntNumberTerm(i))
}
setB.Add(IntNumberTerm(-1))
b.ResetTimer()
for i := 0; i < b.N; i++ {
setC := setA.Intersect(setB)
if setC.Len() != sizes[0] {
b.Fatal("expected size to be equal")
}
}
})
}
}
func BenchmarkSetMembership(b *testing.B) {
sizes := []int{5, 50, 500, 5000}
for _, n := range sizes {
b.Run(fmt.Sprint(n), func(b *testing.B) {
setA := NewSet()
for i := 0; i < n; i++ {
setA.Add(IntNumberTerm(i))
}
key := IntNumberTerm(n - 1)
b.ResetTimer()
for i := 0; i < b.N; i++ {
if !setA.Contains(key) {
b.Fatal("expected hit")
}
}
})
}
}
func BenchmarkTermHashing(b *testing.B) {
sizes := []int{10, 100, 1000}
for _, n := range sizes {
b.Run(fmt.Sprint(n), func(b *testing.B) {
s := String(strings.Repeat("a", n))
b.ResetTimer()
for i := 0; i < b.N; i++ {
_ = s.Hash()
}
})
}
}
var str string
var bs []byte
// BenchmarkObjectString generates several objects of different sizes, and
// marshals them to JSON via two ways:
// map[string]int -> ast.Value -> .String()
// and
// map[string]int -> json.Marshal()
//
// The difference between these two is relevant for feeding input into the
// wasm vm: when calling rego.New(...) with rego.Target("wasm"), it's up to
// the caller to provide the input in parsed form (ast.Value), or
// raw (interface{}).
func BenchmarkObjectString(b *testing.B) {
var err error
sizes := []int{5, 50, 500, 5000}
for _, n := range sizes {
b.Run(fmt.Sprint(n), func(b *testing.B) {
obj := map[string]int{}
for i := 0; i < n; i++ {
obj[fmt.Sprint(i)] = i
}
val := MustInterfaceToValue(obj)
b.Run("String()", func(b *testing.B) {
b.ResetTimer()
for i := 0; i < b.N; i++ {
str = val.String()
}
})
b.Run("json.Marshal", func(b *testing.B) {
b.ResetTimer()
for i := 0; i < b.N; i++ {
bs, err = json.Marshal(obj)
if err != nil {
b.Fatal(err)
}
}
})
})
}
}
// This benchmark works similarly to BenchmarkObjectString, but with a key
// difference: it benchmarks the String and MarshalJSON interface functions
// for the Objec, instead of the underlying data structure. This ensures
// that we catch the full performance properties of Object's implementation.
func BenchmarkObjectStringInterfaces(b *testing.B) {
var err error
sizes := []int{5, 50, 500, 5000, 50000}
for _, n := range sizes {
b.Run(fmt.Sprint(n), func(b *testing.B) {
obj := map[string]int{}
for i := 0; i < n; i++ {
obj[fmt.Sprint(i)] = i
}
valString := MustInterfaceToValue(obj)
valJSON := MustInterfaceToValue(obj)
b.Run("String()", func(b *testing.B) {
b.ResetTimer()
for i := 0; i < b.N; i++ {
str = valString.String()
}
})
b.Run("json.Marshal", func(b *testing.B) {
b.ResetTimer()
for i := 0; i < b.N; i++ {
bs, err = json.Marshal(valJSON)
if err != nil {
b.Fatal(err)
}
}
})
})
}
}
func BenchmarkObjectConstruction(b *testing.B) {
sizes := []int{5, 50, 500, 5000, 50000, 500000}
seed := time.Now().UnixNano()
b.Run("shuffled keys", func(b *testing.B) {
for _, n := range sizes {
b.Run(fmt.Sprint(n), func(b *testing.B) {
es := []struct{ k, v int }{}
for i := 0; i < n; i++ {
es = append(es, struct{ k, v int }{i, i})
}
rand.Seed(seed)
rand.Shuffle(len(es), func(i, j int) { es[i], es[j] = es[j], es[i] })
b.ResetTimer()
for i := 0; i < b.N; i++ {
obj := NewObject()
for _, e := range es {
obj.Insert(IntNumberTerm(e.k), IntNumberTerm(e.v))
}
}
})
}
})
b.Run("increasing keys", func(b *testing.B) {
for _, n := range sizes {
b.Run(fmt.Sprint(n), func(b *testing.B) {
es := []struct{ k, v int }{}
for v := 0; v < n; v++ {
es = append(es, struct{ k, v int }{v, v})
}
b.ResetTimer()
for i := 0; i < b.N; i++ {
obj := NewObject()
for _, e := range es {
obj.Insert(IntNumberTerm(e.k), IntNumberTerm(e.v))
}
}
})
}
})
}
// BenchmarkArrayString compares the performance characteristics of
// (ast.Value).String() with the stdlib-native json.Marshal. See
// BenchmarkObjectString above for details.
func BenchmarkArrayString(b *testing.B) {
var err error
sizes := []int{5, 50, 500, 5000}
for _, n := range sizes {
b.Run(fmt.Sprint(n), func(b *testing.B) {
obj := make([]string, n)
for i := 0; i < n; i++ {
obj[i] = fmt.Sprint(i)
}
val := MustInterfaceToValue(obj)
b.Run("String()", func(b *testing.B) {
b.ResetTimer()
for i := 0; i < b.N; i++ {
str = val.String()
}
})
b.Run("json.Marshal", func(b *testing.B) {
b.ResetTimer()
for i := 0; i < b.N; i++ {
bs, err = json.Marshal(obj)
if err != nil {
b.Fatal(err)
}
}
})
})
}
}
func BenchmarkSetString(b *testing.B) {
sizes := []int{5, 50, 500, 5000}
for _, n := range sizes {
b.Run(fmt.Sprint(n), func(b *testing.B) {
val := NewSet()
for i := 0; i < n; i++ {
val.Add(IntNumberTerm(i))
}
b.Run("String()", func(b *testing.B) {
b.ResetTimer()
for i := 0; i < b.N; i++ {
str = val.String()
}
})
})
}
}