wal/memory_bench_test.go at main · mgurevin/wal · GitHub

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package wal_test

import (
	"context"
	"strconv"
	"testing"

	"github.com/mgurevin/wal"
)

func BenchmarkMemoryWALAppendVolatile4KiB(b *testing.B) {
	payload := make([]byte, 4<<10)

	records := make([]wal.Record, b.N)
	for index := range records {
		records[index] = wal.Record{
			ID:   strconv.Itoa(index),
			Data: payload,
		}
	}

	log, err := wal.NewMemory(wal.MemoryConfig{
		MaxBytes:       int64(len(records)) * int64(len(payload)+32),
		MaxRecords:     len(records),
		MaxRecordBytes: len(payload),
		MaxReadEntries: 1,
	})
	if err != nil {
		b.Fatal(err)
	}
	defer closeTest(b, log.Close)

	b.ReportAllocs()
	b.ResetTimer()

	// Keep b.N: the WAL and unique record IDs must be sized before timing starts.
	for index := 0; index < b.N; index++ {
		if _, err := log.Append(
			context.Background(),
			records[index],
			wal.Volatile,
		); err != nil {
			b.Fatal(err)
		}
	}
}

func BenchmarkMemoryWALFlush(b *testing.B) {
	log, err := wal.NewMemory(wal.MemoryConfig{
		MaxBytes:       1 << 20,
		MaxRecords:     128,
		MaxRecordBytes: 1 << 10,
		MaxReadEntries: 128,
	})
	if err != nil {
		b.Fatal(err)
	}
	defer closeTest(b, log.Close)

	if _, err := log.Append(
		context.Background(),
		wal.Record{ID: "one", Data: []byte("payload")},
		wal.Volatile,
	); err != nil {
		b.Fatal(err)
	}

	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()

	b.ReportAllocs()

	for b.Loop() {
		watermark, err := log.Flush(ctx, wal.Volatile)
		if err != nil || watermark != 1 {
			b.Fatalf("Flush = (%d, %v)", watermark, err)
		}
	}
}

func BenchmarkMemoryWALScan10000(b *testing.B) {
	const records = 10_000

	log, err := wal.NewMemory(wal.MemoryConfig{
		MaxBytes:       1 << 20,
		MaxRecords:     records,
		MaxRecordBytes: 32,
		MaxReadEntries: records,
	})
	if err != nil {
		b.Fatal(err)
	}

	for index := range records {
		if _, err := log.Append(context.Background(),
			wal.Record{
				ID:   strconv.Itoa(index),
				Data: []byte("record"),
			},
			wal.Volatile); err != nil {
			b.Fatal(err)
		}
	}

	b.ReportAllocs()

	for b.Loop() {
		if err := log.Scan(
			context.Background(),
			0,
			records,
			func(wal.Entry) error { return nil },
		); err != nil {
			b.Fatal(err)
		}
	}
}