From 2c55ec9ac394f8504d676ffe5162fded0538bbe5 Mon Sep 17 00:00:00 2001 From: Ali Alaee Date: Fri, 13 Mar 2026 15:59:04 +0100 Subject: [PATCH] Add benchmarks --- README.md | 34 +++++ benchmark/README.md | 44 +++++++ benchmark/go.mod | 55 +++++++++ benchmark/go.sum | 293 ++++++++++++++++++++++++++++++++++++++++++++ benchmark/main.go | 221 +++++++++++++++++++++++++++++++++ 5 files changed, 647 insertions(+) create mode 100644 benchmark/README.md create mode 100644 benchmark/go.mod create mode 100644 benchmark/go.sum create mode 100644 benchmark/main.go diff --git a/README.md b/README.md index 444b607..8a5c2b3 100644 --- a/README.md +++ b/README.md @@ -36,6 +36,40 @@ This design provides the same durability guarantees as calling `fsync` after eve go get github.com/alialaee/logfile ``` +## Benchmarks + +See [benchmark/README.md](benchmark/README.md). + +Here's the latest result from my laptop (M4 MacBook Air 2025, on-battery): + +``` +=== Logfile Write (This library) +Total bytes written: 477 MB +Time taken: 576.585416ms +Throughput: 828.85 MB/s + +=== Direct File Write+Flush === +Total bytes written: 119 MB +Time taken: 1.022756167s +Throughput: 116.82 MB/s + +=== Tidwall WAL Write === +Total bytes written: 119 MB +Time taken: 1.117973042s +Throughput: 106.87 MB/s + +=== Hashicorp Raft Write === +Total bytes written: 119 MB +Time taken: 1.197531459s +Throughput: 99.77 MB/s + +=== Pebble Record Write === +Total bytes written: 477 MB +Time taken: 678.86125ms +Throughput: 703.98 MB/s +``` + + ## Usage ```go diff --git a/benchmark/README.md b/benchmark/README.md new file mode 100644 index 0000000..5a91d7b --- /dev/null +++ b/benchmark/README.md @@ -0,0 +1,44 @@ +# Benchmarking + +The benchmarking is a work in progress, but the initial results are promising. The benchmark writes 50 records of random sizes between 512 bytes and 1MB, with a concurrency of 20 goroutines (each writing the same set of records), and measures the total time taken for all writes to complete. If the library doesn't support concurrent writes, it will just write the records sequentially in a single goroutine. + + +# Libraries + +- **Logfile**: the library implemented in this repo. +- **Direct File Write+Flush**: a simple implementation that writes each record directly to the file and calls `Sync` after each write, without any batching or optimization. +- **Tidwall WAL**: a popular write-ahead log library that supports concurrent writes and fsync, but doesn't use group commit. +- **Hashicorp Raft**: the write-ahead log implementation used in Hashicorp's Raft library, which also supports concurrent writes but doesn't use group commit. +- **Pebble Record**: the record writer used in the Pebble key-value store. + + +## Results + +Here's the initial benchmark results on my machine: + +``` +=== Logfile Write === +Total bytes written: 477 MB +Time taken: 576.585416ms +Throughput: 828.85 MB/s + +=== Direct File Write+Flush === +Total bytes written: 119 MB +Time taken: 1.022756167s +Throughput: 116.82 MB/s + +=== Tidwall WAL Write === +Total bytes written: 119 MB +Time taken: 1.117973042s +Throughput: 106.87 MB/s + +=== Hashicorp Raft Write === +Total bytes written: 119 MB +Time taken: 1.197531459s +Throughput: 99.77 MB/s + +=== Pebble Record Write === +Total bytes written: 477 MB +Time taken: 678.86125ms +Throughput: 703.98 MB/s +``` \ No newline at end of file diff --git a/benchmark/go.mod b/benchmark/go.mod new file mode 100644 index 0000000..71fd2b4 --- /dev/null +++ b/benchmark/go.mod @@ -0,0 +1,55 @@ +module github.com/alialaee/logfile/benchmark + +go 1.26.1 + +require ( + github.com/alialaee/logfile v0.0.0-20260311130226-838864baad48 + github.com/cockroachdb/pebble v1.1.5 + github.com/hashicorp/raft v1.4.0 + github.com/hashicorp/raft-wal v0.4.2 + github.com/tidwall/wal v1.2.1 +) + +replace github.com/alialaee/logfile => ../ + +require ( + github.com/armon/go-metrics v0.4.1 // indirect + github.com/benbjohnson/immutable v0.4.0 // indirect + github.com/beorn7/perks v1.0.1 // indirect + github.com/cespare/xxhash/v2 v2.2.0 // indirect + github.com/cockroachdb/errors v1.11.3 // indirect + github.com/cockroachdb/logtags v0.0.0-20230118201751-21c54148d20b // indirect + github.com/cockroachdb/redact v1.1.5 // indirect + github.com/coreos/etcd v3.3.27+incompatible // indirect + github.com/coreos/go-systemd v0.0.0-20191104093116-d3cd4ed1dbcf // indirect + github.com/coreos/pkg v0.0.0-20220810130054-c7d1c02cb6cf // indirect + github.com/fatih/color v1.9.0 // indirect + github.com/getsentry/sentry-go v0.27.0 // indirect + github.com/gogo/protobuf v1.3.2 // indirect + github.com/golang/protobuf v1.5.3 // indirect + github.com/hashicorp/go-hclog v0.14.1 // indirect + github.com/hashicorp/go-immutable-radix v1.3.0 // indirect + github.com/hashicorp/go-metrics v0.5.4 // indirect + github.com/hashicorp/go-msgpack v1.1.5 // indirect + github.com/hashicorp/golang-lru v0.5.4 // indirect + github.com/kr/pretty v0.3.1 // indirect + github.com/kr/text v0.2.0 // indirect + github.com/mattn/go-colorable v0.1.13 // indirect + github.com/mattn/go-isatty v0.0.17 // indirect + github.com/matttproud/golang_protobuf_extensions v1.0.4 // indirect + github.com/pkg/errors v0.9.1 // indirect + github.com/prometheus/client_golang v1.15.0 // indirect + github.com/prometheus/client_model v0.3.0 // indirect + github.com/prometheus/common v0.42.0 // indirect + github.com/prometheus/procfs v0.9.0 // indirect + github.com/rogpeppe/go-internal v1.9.0 // indirect + github.com/tidwall/gjson v1.18.0 // indirect + github.com/tidwall/match v1.2.0 // indirect + github.com/tidwall/pretty v1.2.1 // indirect + github.com/tidwall/tinylru v1.2.1 // indirect + go.etcd.io/bbolt v1.3.6 // indirect + golang.org/x/exp v0.0.0-20230626212559-97b1e661b5df // indirect + golang.org/x/sys v0.18.0 // indirect + golang.org/x/text v0.14.0 // indirect + google.golang.org/protobuf v1.33.0 // indirect +) diff --git a/benchmark/go.sum b/benchmark/go.sum new file 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"github.com/hashicorp/raft" + hashicorp "github.com/hashicorp/raft-wal" + tidwall "github.com/tidwall/wal" +) + +var randSrc = rand.NewSource(100) // Fixed seed for reproducibility +var rng = rand.New(randSrc) + +func main() { + totalBytes, records := createRecords(512, 1024*1024, 50) + + concurrency := 20 + measureAndPrintResults("Logfile Write", totalBytes*int64(concurrency), func() error { + return benchmarkLogfileWrite(records, concurrency) + }) + + repeat := 5 + measureAndPrintResults("Direct File Write+Flush", totalBytes*int64(repeat), func() error { + return benchmarkWriteFlush(records, repeat) + }) + + repeat = 5 + measureAndPrintResults("Tidwall WAL Write", totalBytes*int64(repeat), func() error { + return benchmarkTidwallWrite(records, repeat) + }) + + repeat = 5 + measureAndPrintResults("Hashicorp Raft Write", totalBytes*int64(repeat), func() error { + return benchmarkHashicorpWrite(records, repeat) + }) + + concurrency = 20 + measureAndPrintResults("Pebble Record Write", totalBytes*int64(concurrency), func() error { + return benchmarkPebbleWrite(records, concurrency) + }) +} + +func measureAndPrintResults(name string, totalBytes int64, fn func() error) { + startTime := time.Now() + if err := fn(); err != nil { + panic(err) + } + timeTaken := time.Since(startTime) + fmt.Printf("=== %s ===\n", name) + fmt.Printf("Total bytes written: %d MB\n", totalBytes/1024/1024) + fmt.Printf("Time taken: %s\n", timeTaken.String()) + fmt.Printf("Throughput: %.2f MB/s\n", float64(totalBytes)/timeTaken.Seconds()/1024/1024) + fmt.Println() +} + +func benchmarkWriteFlush(records [][]byte, concurrency int) error { + tmpFile, err := os.CreateTemp("", "logfilebenchmark") + if err != nil { + panic(err) + } + defer func() { _ = tmpFile.Close(); _ = os.Remove(tmpFile.Name()) }() + + for range concurrency { + for _, rec := range records { + if _, err := tmpFile.Write(rec); err != nil { + return err + } + + if err := tmpFile.Sync(); err != nil { + return err + } + } + } + return nil +} + +func benchmarkLogfileWrite(records [][]byte, concurrency int) error { + tmpFile, err := os.CreateTemp("", "logfilebenchmark") + if err != nil { + panic(err) + } + defer func() { _ = tmpFile.Close(); _ = os.Remove(tmpFile.Name()) }() + + lf, err := logfile.New(tmpFile, 0, 8*1024*1024, false) + if err != nil { + return err + } + defer func() { _ = lf.Close() }() + + wg := &sync.WaitGroup{} + for range concurrency { + wg.Go(func() { + for _, rec := range records { + if _, err := lf.Write(context.Background(), rec); err != nil { + panic(err) + } + } + }) + } + + wg.Wait() + return nil +} + +func benchmarkTidwallWrite(records [][]byte, concurrency int) error { + tempDir, err := os.MkdirTemp("", "tidwallbenchmark") + if err != nil { + return err + } + defer func() { _ = os.RemoveAll(tempDir) }() + + log, err := tidwall.Open(tempDir, nil) + if err != nil { + return err + } + + // wg := &sync.WaitGroup{} + var index atomic.Int64 + for range concurrency { + // wg.Go(func() { + for _, rec := range records { + i := index.Add(1) + if err := log.Write(uint64(i), rec); err != nil { + panic(err) + } + } + // }) + } + // wg.Wait() + + defer func() { _ = log.Close() }() + return nil +} + +func benchmarkHashicorpWrite(records [][]byte, repeat int) error { + tempDir, err := os.MkdirTemp("", "hashicorpbenchmark") + if err != nil { + return err + } + defer func() { _ = os.RemoveAll(tempDir) }() + + log, err := hashicorp.Open(tempDir) + if err != nil { + return err + } + + var index atomic.Int64 + for range repeat { + for _, rec := range records { + err := log.StoreLog(&raft.Log{ + Index: uint64(index.Add(1)), + Data: rec, + }) + if err != nil { + panic(err) + } + } + } + + return nil +} + +func benchmarkPebbleWrite(records [][]byte, concurrency int) error { + tmpFile, err := os.CreateTemp("", "logfilebenchmark") + if err != nil { + panic(err) + } + fileName := tmpFile.Name() + defer func() { _ = os.Remove(fileName) }() + + log := record.NewLogWriter(tmpFile, 1, record.LogWriterConfig{}) + defer func() { _ = log.Close() }() + + wg := &sync.WaitGroup{} + var mu sync.Mutex + for range concurrency { + wg.Go(func() { + wg2 := &sync.WaitGroup{} + var errOut error + for _, rec := range records { + mu.Lock() + wg2.Add(1) + _, err := log.SyncRecord(rec, wg2, &errOut) + mu.Unlock() + if err != nil { + panic(err) + } + wg2.Wait() + + if errOut != nil { + panic(errOut) + } + } + }) + } + wg.Wait() + + return nil +} + +func createRecords(minSize int, maxSize int, count int) (totalBytes int64, records [][]byte) { + for range count { + randSize := minSize + rng.Intn(maxSize-minSize+1) + buf := make([]byte, randSize) + if n, err := crand.Read(buf); err != nil && n != randSize { + panic(err) + } + records = append(records, buf) + totalBytes += int64(randSize) + } + return totalBytes, records +}