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|
package dataset
import (
"bufio"
"os"
"sync"
"testing"
"go.jknobloc.com/x/shelf"
)
func TestCountLinesAll(t *testing.T) {
names := []string{
shelf.Abs("data/babylm/train_100M/bnc_spoken.train"),
shelf.Abs("data/babylm/train_100M/childes.train"),
shelf.Abs("data/babylm/train_100M/gutenberg.train"),
shelf.Abs("data/babylm/train_100M/open_subtitles.train"),
shelf.Abs("data/babylm/train_100M/simple_wiki.train"),
shelf.Abs("data/babylm/train_100M/switchboard.train"),
}
n, err := countLinesAll(names, []byte("\n"))
if err != nil {
t.Fatal(err)
}
m, err := countLinesNaive(names...)
if err != nil {
t.Fatal(err)
}
if n != m {
t.Errorf("expected %d but got %d\n", m, n)
}
}
func BenchmarkCountAll(b *testing.B) {
names := []string{
shelf.Abs("data/babylm/train_100M/bnc_spoken.train"),
shelf.Abs("data/babylm/train_100M/childes.train"),
shelf.Abs("data/babylm/train_100M/gutenberg.train"),
shelf.Abs("data/babylm/train_100M/open_subtitles.train"),
shelf.Abs("data/babylm/train_100M/simple_wiki.train"),
shelf.Abs("data/babylm/train_100M/switchboard.train"),
}
for i := 0; i < b.N; i++ {
_, err := countLinesAll(names, []byte("\n"))
if err != nil {
b.Fatal(err)
}
}
}
func BenchmarkCountLinesNaive(b *testing.B) {
names := []string{
shelf.Abs("data/babylm/train_100M/bnc_spoken.train"),
shelf.Abs("data/babylm/train_100M/childes.train"),
shelf.Abs("data/babylm/train_100M/gutenberg.train"),
shelf.Abs("data/babylm/train_100M/open_subtitles.train"),
shelf.Abs("data/babylm/train_100M/simple_wiki.train"),
shelf.Abs("data/babylm/train_100M/switchboard.train"),
}
for i := 0; i < b.N; i++ {
_, err := countLinesNaive(names...)
if err != nil {
b.Fatal(err)
}
}
}
func countLinesNaive(names ...string) (int, error) {
var wg sync.WaitGroup
results := make(chan int, len(names))
errors := make(chan error, len(names))
for _, name := range names {
wg.Add(1)
go func() {
defer wg.Done()
var scanner *bufio.Scanner
if file, err := os.Open(name); err != nil {
results <- 0
errors <- err
return
} else {
scanner = bufio.NewScanner(file)
buf := make([]byte, 0, 1024*1024)
scanner.Buffer(buf, 1024*1024)
defer file.Close()
}
count := 0
for scanner.Scan() {
count++
}
if err := scanner.Err(); err != nil {
results <- 0
errors <- err
return
}
results <- count
}()
}
wg.Wait()
close(results)
close(errors)
total := 0
for count := range results {
total += count
}
return total, <-errors
}
|
