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package stm
import (
"sync"
"testing"
)
func BenchmarkAtomicGet(b *testing.B) {
x := NewVar(0)
for i := 0; i < b.N; i++ {
AtomicGet(x)
}
}
func BenchmarkAtomicSet(b *testing.B) {
x := NewVar(0)
for i := 0; i < b.N; i++ {
AtomicSet(x, 0)
}
}
func BenchmarkIncrementSTM(b *testing.B) {
for i := 0; i < b.N; i++ {
// spawn 1000 goroutines that each increment x by 1
x := NewVar(0)
for i := 0; i < 1000; i++ {
go Atomically(func(tx *Tx) {
cur := tx.Get(x).(int)
tx.Set(x, cur+1)
})
}
// wait for x to reach 1000
Atomically(func(tx *Tx) {
tx.Assert(tx.Get(x).(int) == 1000)
})
}
}
func BenchmarkIncrementMutex(b *testing.B) {
for i := 0; i < b.N; i++ {
var mu sync.Mutex
x := 0
for i := 0; i < 1000; i++ {
go func() {
mu.Lock()
x++
mu.Unlock()
}()
}
for {
mu.Lock()
read := x
mu.Unlock()
if read == 1000 {
break
}
}
}
}
func BenchmarkIncrementChannel(b *testing.B) {
for i := 0; i < b.N; i++ {
c := make(chan int, 1)
c <- 0
for i := 0; i < 1000; i++ {
go func() {
c <- 1 + <-c
}()
}
for {
read := <-c
if read == 1000 {
break
}
c <- read
}
}
}
func BenchmarkReadVarSTM(b *testing.B) {
for i := 0; i < b.N; i++ {
var wg sync.WaitGroup
wg.Add(1000)
x := NewVar(0)
for i := 0; i < 1000; i++ {
go func() {
AtomicGet(x)
wg.Done()
}()
}
wg.Wait()
}
}
func BenchmarkReadVarMutex(b *testing.B) {
for i := 0; i < b.N; i++ {
var mu sync.Mutex
var wg sync.WaitGroup
wg.Add(1000)
x := 0
for i := 0; i < 1000; i++ {
go func() {
mu.Lock()
_ = x
mu.Unlock()
wg.Done()
}()
}
wg.Wait()
}
}
func BenchmarkReadVarChannel(b *testing.B) {
for i := 0; i < b.N; i++ {
var wg sync.WaitGroup
wg.Add(1000)
c := make(chan int)
close(c)
for i := 0; i < 1000; i++ {
go func() {
<-c
wg.Done()
}()
}
wg.Wait()
}
}
func BenchmarkPingPong(b *testing.B) {
b.ReportAllocs()
testPingPong(b, b.N, func(string) {})
}
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