decimal/decimal_bench_test.go
Mateusz Woś 78289cc844
Add improved implementation of power operation (#358)
* Adjust Pow implementation
* Add PowWithPrecision method
* Add PowInt32 method
* Add PowBigInt method
2024-04-03 00:16:27 +02:00

286 lines
5.4 KiB
Go

package decimal
import (
"fmt"
"math"
"math/big"
"math/rand"
"sort"
"strconv"
"testing"
)
type DecimalSlice []Decimal
func (p DecimalSlice) Len() int { return len(p) }
func (p DecimalSlice) Swap(i, j int) { p[i], p[j] = p[j], p[i] }
func (p DecimalSlice) Less(i, j int) bool { return p[i].Cmp(p[j]) < 0 }
func BenchmarkNewFromFloatWithExponent(b *testing.B) {
rng := rand.New(rand.NewSource(0xdead1337))
in := make([]float64, b.N)
for i := range in {
in[i] = rng.NormFloat64() * 10e20
}
b.ReportAllocs()
b.StartTimer()
for i := 0; i < b.N; i++ {
in := rng.NormFloat64() * 10e20
_ = NewFromFloatWithExponent(in, math.MinInt32)
}
}
func BenchmarkNewFromFloat(b *testing.B) {
rng := rand.New(rand.NewSource(0xdead1337))
in := make([]float64, b.N)
for i := range in {
in[i] = rng.NormFloat64() * 10e20
}
b.ReportAllocs()
b.StartTimer()
for i := 0; i < b.N; i++ {
_ = NewFromFloat(in[i])
}
}
func BenchmarkNewFromStringFloat(b *testing.B) {
rng := rand.New(rand.NewSource(0xdead1337))
in := make([]float64, b.N)
for i := range in {
in[i] = rng.NormFloat64() * 10e20
}
b.ReportAllocs()
b.StartTimer()
for i := 0; i < b.N; i++ {
in := strconv.FormatFloat(in[i], 'f', -1, 64)
_, _ = NewFromString(in)
}
}
func Benchmark_FloorFast(b *testing.B) {
input := New(200, 2)
b.ResetTimer()
for i := 0; i < b.N; i++ {
input.Floor()
}
}
func Benchmark_FloorRegular(b *testing.B) {
input := New(200, -2)
b.ResetTimer()
for i := 0; i < b.N; i++ {
input.Floor()
}
}
func Benchmark_DivideOriginal(b *testing.B) {
tcs := createDivTestCases()
b.ResetTimer()
for i := 0; i < b.N; i++ {
for _, tc := range tcs {
d := tc.d
if sign(tc.d2) == 0 {
continue
}
d2 := tc.d2
prec := tc.prec
a := d.DivOld(d2, int(prec))
if sign(a) > 2 {
panic("dummy panic")
}
}
}
}
func Benchmark_DivideNew(b *testing.B) {
tcs := createDivTestCases()
b.ResetTimer()
for i := 0; i < b.N; i++ {
for _, tc := range tcs {
d := tc.d
if sign(tc.d2) == 0 {
continue
}
d2 := tc.d2
prec := tc.prec
a := d.DivRound(d2, prec)
if sign(a) > 2 {
panic("dummy panic")
}
}
}
}
func BenchmarkDecimal_RoundCash_Five(b *testing.B) {
const want = "3.50"
for i := 0; i < b.N; i++ {
val := New(3478, -3)
if have := val.StringFixedCash(5); have != want {
b.Fatalf("\nHave: %q\nWant: %q", have, want)
}
}
}
func Benchmark_Cmp(b *testing.B) {
decimals := DecimalSlice([]Decimal{})
for i := 0; i < 1000000; i++ {
decimals = append(decimals, New(int64(i), 0))
}
b.ResetTimer()
for i := 0; i < b.N; i++ {
sort.Sort(decimals)
}
}
func Benchmark_decimal_Decimal_Add_different_precision(b *testing.B) {
d1 := NewFromFloat(1000.123)
d2 := NewFromFloat(500).Mul(NewFromFloat(0.12))
b.ReportAllocs()
b.StartTimer()
for i := 0; i < b.N; i++ {
d1.Add(d2)
}
}
func Benchmark_decimal_Decimal_Sub_different_precision(b *testing.B) {
d1 := NewFromFloat(1000.123)
d2 := NewFromFloat(500).Mul(NewFromFloat(0.12))
b.ReportAllocs()
b.StartTimer()
for i := 0; i < b.N; i++ {
d1.Sub(d2)
}
}
func Benchmark_decimal_Decimal_Add_same_precision(b *testing.B) {
d1 := NewFromFloat(1000.123)
d2 := NewFromFloat(500.123)
b.ReportAllocs()
b.StartTimer()
for i := 0; i < b.N; i++ {
d1.Add(d2)
}
}
func Benchmark_decimal_Decimal_Sub_same_precision(b *testing.B) {
d1 := NewFromFloat(1000.123)
d2 := NewFromFloat(500.123)
b.ReportAllocs()
b.StartTimer()
for i := 0; i < b.N; i++ {
d1.Add(d2)
}
}
func BenchmarkDecimal_IsInteger(b *testing.B) {
d := RequireFromString("12.000")
b.ReportAllocs()
b.StartTimer()
for i := 0; i < b.N; i++ {
d.IsInteger()
}
}
func BenchmarkDecimal_Pow(b *testing.B) {
d1 := RequireFromString("5.2")
d2 := RequireFromString("6.3")
for i := 0; i < b.N; i++ {
d1.Pow(d2)
}
}
func BenchmarkDecimal_PowWithPrecision(b *testing.B) {
d1 := RequireFromString("5.2")
d2 := RequireFromString("6.3")
for i := 0; i < b.N; i++ {
_, _ = d1.PowWithPrecision(d2, 8)
}
}
func BenchmarkDecimal_PowInt32(b *testing.B) {
d1 := RequireFromString("5.2")
d2 := int32(10)
for i := 0; i < b.N; i++ {
_, _ = d1.PowInt32(d2)
}
}
func BenchmarkDecimal_PowBigInt(b *testing.B) {
d1 := RequireFromString("5.2")
d2 := big.NewInt(10)
for i := 0; i < b.N; i++ {
_, _ = d1.PowBigInt(d2)
}
}
func BenchmarkDecimal_NewFromString(b *testing.B) {
count := 72
prices := make([]string, 0, count)
for i := 1; i <= count; i++ {
prices = append(prices, fmt.Sprintf("%d.%d", i*100, i))
}
b.ReportAllocs()
b.ResetTimer()
for i := 0; i < b.N; i++ {
for _, p := range prices {
d, err := NewFromString(p)
if err != nil {
b.Log(d)
b.Error(err)
}
}
}
}
func BenchmarkDecimal_NewFromString_large_number(b *testing.B) {
count := 72
prices := make([]string, 0, count)
for i := 1; i <= count; i++ {
prices = append(prices, "9323372036854775807.9223372036854775807")
}
b.ReportAllocs()
b.ResetTimer()
for i := 0; i < b.N; i++ {
for _, p := range prices {
d, err := NewFromString(p)
if err != nil {
b.Log(d)
b.Error(err)
}
}
}
}
func BenchmarkDecimal_ExpHullAbraham(b *testing.B) {
b.ResetTimer()
d := RequireFromString("30.412346346346")
b.ReportAllocs()
b.ResetTimer()
for i := 0; i < b.N; i++ {
_, _ = d.ExpHullAbrham(10)
}
}
func BenchmarkDecimal_ExpTaylor(b *testing.B) {
b.ResetTimer()
d := RequireFromString("30.412346346346")
b.ReportAllocs()
b.ResetTimer()
for i := 0; i < b.N; i++ {
_, _ = d.ExpTaylor(10)
}
}