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package fs
import (
"bytes"
"context"
"strings"
"testing"
"time"
"github.com/mimecast/dtail/internal/io/pool"
)
// BenchmarkChunkedReader tests the performance of the chunked reader
func BenchmarkChunkedReader(b *testing.B) {
// Create test data - simulate a log file with many lines
var testData strings.Builder
for i := 0; i < 10000; i++ {
testData.WriteString("INFO|1002-071143|1|stats.go:56|8|13|7|0.21|471h0m21s|MAPREDUCE:STATS|currentConnections=0|lifetimeConnections=1\n")
}
data := testData.String()
b.ResetTimer()
b.ReportAllocs()
for i := 0; i < b.N; i++ {
reader := strings.NewReader(data)
chunkedReader := NewChunkedReader(reader, 64*1024)
rawLines := make(chan *bytes.Buffer, 100)
serverMessages := make(chan string, 10)
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
go func() {
defer cancel()
err := chunkedReader.ProcessLines(ctx, rawLines, 1000, "test.log", serverMessages, false)
if err != nil {
b.Errorf("ProcessLines error: %v", err)
}
close(rawLines)
}()
// Consume all lines
lineCount := 0
for line := range rawLines {
lineCount++
pool.BytesBuffer.Put(line)
}
cancel()
if lineCount != 10000 {
b.Errorf("Expected 10000 lines, got %d", lineCount)
}
}
}
// BenchmarkChunkedReaderSmall tests performance with smaller chunks
func BenchmarkChunkedReaderSmall(b *testing.B) {
// Create smaller test data
var testData strings.Builder
for i := 0; i < 1000; i++ {
testData.WriteString("INFO|1002-071143|1|stats.go:56|8|13|7|0.21|471h0m21s|MAPREDUCE:STATS|currentConnections=0|lifetimeConnections=1\n")
}
data := testData.String()
b.ResetTimer()
b.ReportAllocs()
for i := 0; i < b.N; i++ {
reader := strings.NewReader(data)
chunkedReader := NewChunkedReader(reader, 4*1024) // 4KB chunks
rawLines := make(chan *bytes.Buffer, 100)
serverMessages := make(chan string, 10)
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
go func() {
defer cancel()
err := chunkedReader.ProcessLines(ctx, rawLines, 1000, "test.log", serverMessages, false)
if err != nil {
b.Errorf("ProcessLines error: %v", err)
}
close(rawLines)
}()
// Consume all lines
lineCount := 0
for line := range rawLines {
lineCount++
pool.BytesBuffer.Put(line)
}
cancel()
if lineCount != 1000 {
b.Errorf("Expected 1000 lines, got %d", lineCount)
}
}
}
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