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bwarr_bench_test.go
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469 lines (399 loc) · 8.48 KB
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package bwarr
// Benchmarks with prefix QA (quality assurance) is for tracking performance regressions.
import (
"math/rand"
"testing"
)
// Less by 1 than segment size to provoke segment allocation
// and to use as many segments as possible for non-modifying operations.
const elemsOnStart = 4*1024*1024 - 1
func BenchmarkQA_Insert(b *testing.B) {
benchmarkAppend(b, elemsOnStart, elemsOnStart)
}
func BenchmarkQA_ReplaceOrInsertNotFound(b *testing.B) {
benchmarkReplace(b, elemsOnStart, elemsOnStart)
}
func BenchmarkQA_ReplaceOrInsertFound(b *testing.B) {
bwa := New(int64Cmp, elemsOnStart)
preparedData := make([]int64, elemsOnStart)
for i := range elemsOnStart {
preparedData[i] = rand.Int63()
bwa.Insert(preparedData[i])
}
b.SetBytes(8) //nolint:exhaustruct
b.ResetTimer()
b.ReportAllocs()
for i := range b.N {
bwa.ReplaceOrInsert(preparedData[i%elemsOnStart])
}
}
func BenchmarkQA_HasFound(b *testing.B) {
bwa := New(int64Cmp, elemsOnStart)
preparedData := make([]int64, elemsOnStart)
for i := range elemsOnStart {
preparedData[i] = rand.Int63()
bwa.Insert(preparedData[i])
}
b.SetBytes(8) //nolint:exhaustruct
b.ResetTimer()
b.ReportAllocs()
for i := range b.N {
bwa.Has(preparedData[i%elemsOnStart])
}
}
func BenchmarkQA_HasNotFoundWorst(b *testing.B) {
bwa := New(int64Cmp, elemsOnStart)
for range elemsOnStart {
bwa.Insert(rand.Int63())
}
preparedData := make([]int64, b.N)
for i := range b.N {
preparedData[i] = rand.Int63()
}
b.SetBytes(8) //nolint:exhaustruct
b.ResetTimer()
b.ReportAllocs()
for i := range b.N {
bwa.Has(preparedData[i])
}
}
func BenchmarkQA_Min(b *testing.B) {
bwa := New(int64Cmp, elemsOnStart)
for range elemsOnStart {
bwa.Insert(rand.Int63())
}
b.ResetTimer()
b.ReportAllocs()
for range b.N {
bwa.Min()
}
}
func BenchmarkQA_Max(b *testing.B) {
bwa := New(int64Cmp, elemsOnStart)
for range elemsOnStart {
bwa.Insert(rand.Int63())
}
b.ResetTimer()
b.ReportAllocs()
for range b.N {
bwa.Max()
}
}
func BenchmarkQA_Delete(b *testing.B) {
bwa := New(int64Cmp, elemsOnStart+b.N)
for range elemsOnStart {
bwa.Insert(rand.Int63())
}
toDel := make([]int64, b.N)
for i := range b.N {
toDel[i] = rand.Int63()
bwa.Insert(toDel[i])
}
rand.Shuffle(len(toDel), func(i, j int) { toDel[i], toDel[j] = toDel[j], toDel[i] })
b.ResetTimer()
b.ReportAllocs()
for i := range b.N {
if _, found := bwa.Delete(toDel[i]); !found {
b.Fail()
}
}
}
func BenchmarkQA_DeleteMin(b *testing.B) {
const elemsOnStart = 4 * 1024 * 1024
elems := elemsOnStart + b.N
bwa := New(int64Cmp, elems)
for range elems {
bwa.Insert(rand.Int63())
}
b.ResetTimer()
b.ReportAllocs()
for range b.N {
bwa.DeleteMin()
}
}
func BenchmarkQA_DeleteMax(b *testing.B) {
const elemsOnStart = 4 * 1024 * 1024
elems := elemsOnStart + b.N
bwa := New(int64Cmp, elems)
for range elems {
bwa.Insert(rand.Int63())
}
b.ResetTimer()
b.ReportAllocs()
for range b.N {
bwa.DeleteMax()
}
}
func BenchmarkLongQA_NewFromSlice(b *testing.B) {
const elems = 128*1024 - 1
preparedData := make([]int64, elems)
for i := range elems {
preparedData[i] = rand.Int63()
}
b.ResetTimer()
b.ReportAllocs()
for range b.N {
NewFromSlice(int64Cmp, preparedData)
}
}
func BenchmarkLongQA_InsertRandom(b *testing.B) {
const elems = 128*1024 - 1
preparedData := make([]int64, elems)
for i := range elems {
preparedData[i] = rand.Int63()
}
bwa := New(int64Cmp, elems)
b.ResetTimer()
b.ReportAllocs()
for range b.N {
bwa.Clear(true)
for i := range elems {
bwa.Insert(preparedData[i])
}
}
}
func BenchmarkLongQA_AscendRandom(b *testing.B) {
const elems = 128*1024 - 1
bwa := New(int64Cmp, elems)
for range elems {
bwa.Insert(rand.Int63())
}
s := int64(0)
iter := func(x int64) bool {
s += x
return true
}
b.ResetTimer()
b.ReportAllocs()
for range b.N {
bwa.Ascend(iter)
}
}
func BenchmarkLongQA_AscendInc(b *testing.B) {
const elems = 128*1024 - 1
bwa := New(int64Cmp, elems)
for i := range elems {
bwa.Insert(int64(i))
}
s := int64(0)
iter := func(x int64) bool {
s += x
return true
}
b.ResetTimer()
b.ReportAllocs()
for range b.N {
bwa.Ascend(iter)
}
}
func BenchmarkLongQA_AscendDec(b *testing.B) {
const elems = 128*1024 - 1
bwa := New(int64Cmp, elems)
for i := range elems {
bwa.Insert(int64(elems - i))
}
s := int64(0)
iter := func(x int64) bool {
s += x
return true
}
b.ResetTimer()
b.ReportAllocs()
for range b.N {
bwa.Ascend(iter)
}
}
func BenchmarkLongQA_AscendRange(b *testing.B) {
const elems = 128*1024 - 1
bwa := New(int64Cmp, elems)
const from, to = 1000, elems - 1000
for i := range elems {
bwa.Insert(int64(i + from))
}
s := int64(0)
iter := func(x int64) bool {
s += x
return true
}
b.ResetTimer()
b.ReportAllocs()
for range b.N {
bwa.AscendRange(int64(from), int64(to), iter)
}
}
func BenchmarkLongQA_AscendWithDelSeries(b *testing.B) {
const elems = 128*1024 - 1
bwa := New(int64Cmp, elems)
const seriesLen = 301
toDel := make([]int64, 0, elems/seriesLen)
seriesEnd := 0
for i := range elems {
bwa.Insert(int64(i))
if i%12345 == 0 {
seriesEnd = i + rand.Intn(seriesLen)
}
if i < seriesEnd {
toDel = append(toDel, int64(i))
}
}
for i := range toDel {
bwa.Delete(toDel[i])
}
s := int64(0)
iter := func(x int64) bool {
s += x
return true
}
b.ResetTimer()
b.ReportAllocs()
for range b.N {
bwa.Ascend(iter)
}
}
func BenchmarkLongQA_DescendRandom(b *testing.B) {
const elems = 128*1024 - 1
bwa := New(int64Cmp, elems)
for range elems {
bwa.Insert(rand.Int63())
}
s := int64(0)
iter := func(x int64) bool {
s += x
return true
}
b.ResetTimer()
b.ReportAllocs()
for range b.N {
bwa.Descend(iter)
}
}
func BenchmarkLongQA_DescendRangeWithDelSeries(b *testing.B) {
const elems = 128*1024 - 1
bwa := New(int64Cmp, elems)
const seriesLen = 301
toDel := make([]int64, 0, elems/seriesLen)
seriesEnd := 0
for i := range elems {
bwa.Insert(int64(i))
if i%12345 == 0 {
seriesEnd = i + rand.Intn(seriesLen)
}
if i < seriesEnd {
toDel = append(toDel, int64(i))
}
}
for i := range toDel {
bwa.Delete(toDel[i])
}
s := int64(0)
iter := func(x int64) bool {
s += x
return true
}
b.ResetTimer()
b.ReportAllocs()
const from, to = 42, elems - 42
for range b.N {
bwa.DescendRange(from, to, iter)
}
}
func BenchmarkLongQA_UnorderedWalkRandom(b *testing.B) {
const elems = 128*1024 - 1
bwa := New(int64Cmp, elems)
for range elems {
bwa.Insert(rand.Int63())
}
s := int64(0)
iter := func(x int64) bool {
s += x
return true
}
b.ResetTimer()
b.ReportAllocs()
for range b.N {
bwa.UnorderedWalk(iter)
}
}
func BenchmarkLongQA_UnorderedWalkWithDelSeries(b *testing.B) {
const elems = 128*1024 - 1
bwa := New(int64Cmp, elems)
const seriesLen = 301
toDel := make([]int64, 0, elems/seriesLen)
seriesEnd := 0
for i := range elems {
bwa.Insert(int64(i))
if i%12345 == 0 {
seriesEnd = i + rand.Intn(seriesLen)
}
if i < seriesEnd {
toDel = append(toDel, int64(i))
}
}
for i := range toDel {
bwa.Delete(toDel[i])
}
s := int64(0)
iter := func(x int64) bool {
s += x
return true
}
b.ResetTimer()
b.ReportAllocs()
for range b.N {
bwa.UnorderedWalk(iter)
}
}
const mb = 1024 * 1024
func BenchmarkAppendWorstCase1M(b *testing.B) {
benchmarkAppendWorstCase(b, mb)
}
func BenchmarkAppendWorstCase4M(b *testing.B) {
benchmarkAppendWorstCase(b, 4*mb)
}
func BenchmarkAppendWorstCase16M(b *testing.B) {
benchmarkAppendWorstCase(b, 16*mb)
}
func benchmarkAppendWorstCase(b *testing.B, size int) {
// Prepare BWArr with size-1 elements to provoke segment allocation on insert.
bwaDraft := New(int64Cmp, 0)
for range size - 1 {
bwaDraft.Insert(rand.Int63())
}
b.ResetTimer()
for range b.N {
b.StopTimer()
bwa := bwaDraft.Clone() // Deep copy to start from the same state.
b.StartTimer()
bwa.Insert(rand.Int63())
}
}
func benchmarkAppend(b *testing.B, elemsOnStart, capacity int) {
bwa := New(int64Cmp, capacity)
for range elemsOnStart {
bwa.Insert(rand.Int63())
}
preparedData := make([]int64, b.N)
for i := range b.N {
preparedData[i] = rand.Int63()
}
b.ResetTimer()
b.ReportAllocs()
for i := range b.N {
bwa.Insert(preparedData[i])
}
}
func benchmarkReplace(b *testing.B, elemsOnStart, capacity int) {
bwa := New(int64Cmp, capacity)
for range elemsOnStart {
bwa.Insert(rand.Int63())
}
preparedData := make([]int64, b.N)
for i := range b.N {
preparedData[i] = rand.Int63()
}
b.ResetTimer()
b.ReportAllocs()
for i := range b.N {
bwa.ReplaceOrInsert(preparedData[i])
}
}