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bench_test.go
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bench_test.go
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package rscanner_test
import (
"bufio"
"github.com/icza/backscanner"
"github.com/vallerion/rscanner"
"strings"
"testing"
)
func init() {
ll := generateLines(1, 10000)
text = strings.Join(ll, "\n")
}
var text, t string
func BenchmarkScan(b *testing.B) {
s := rscanner.NewScanner(strings.NewReader(text), int64(len(text)))
n := 0
b.ResetTimer()
for i := 0; i < b.N; i++ {
for s.Scan() {
t = s.Text()
n++
}
}
if n == 0 {
b.Fatalf("scanner didn't run")
}
}
func BenchmarkScanSlowReader(b *testing.B) {
s := rscanner.NewScanner(&slowReaderAt{max: 1, buf: strings.NewReader(text)}, int64(len(text)))
n := 0
b.ResetTimer()
for i := 0; i < b.N; i++ {
for s.Scan() {
t = s.Text()
n++
}
}
if n == 0 {
b.Fatalf("scanner didn't run")
}
}
func BenchmarkScanBufio(b *testing.B) {
s := bufio.NewScanner(strings.NewReader(text))
n := 0
b.ResetTimer()
for i := 0; i < b.N; i++ {
for s.Scan() {
t = s.Text()
n++
}
}
if n == 0 {
b.Fatalf("scanner didn't run")
}
}
func BenchmarkScanBufioSlowReader(b *testing.B) {
s := bufio.NewScanner(&slowReader{max: 1, buf: strings.NewReader(text)})
n := 0
b.ResetTimer()
for i := 0; i < b.N; i++ {
for s.Scan() {
t = s.Text()
n++
}
}
if n == 0 {
b.Fatalf("scanner didn't run")
}
}
func BenchmarkScanBackscanner(b *testing.B) {
scanner := backscanner.New(strings.NewReader(text), len(text))
n := 0
var err error
b.ResetTimer()
for i := 0; i < b.N; i++ {
for {
t, _, err = scanner.Line()
n++
if err != nil {
break
}
}
}
if n == 0 {
b.Fatalf("scanner didn't run")
}
}
func BenchmarkScanBackscannerSlowReader(b *testing.B) {
scanner := backscanner.New(&slowReaderAt{max: 1, buf: strings.NewReader(text)}, len(text))
n := 0
var err error
b.ResetTimer()
for i := 0; i < b.N; i++ {
for {
t, _, err = scanner.Line()
n++
if err != nil {
break
}
}
}
if n == 0 {
b.Fatalf("scanner didn't run")
}
}