Initial commit: SRDB - High-performance LSM-Tree database

- Core engine with MemTable, SST, WAL
- B+Tree indexing for SST files  
- Leveled compaction strategy
- Multi-table database management
- Schema validation and secondary indexes
- Query builder with complex conditions
- Web UI with HTMX for data visualization
- Command-line tools for diagnostics

sst/encoding_test.go

@@ -0,0 +1,117 @@
+package sst
+
+import (
+	"encoding/json"
+	"testing"
+)
+
+func TestBinaryEncoding(t *testing.T) {
+	// 创建测试数据
+	row := &Row{
+		Seq:  12345,
+		Time: 1234567890,
+		Data: map[string]interface{}{
+			"name":  "test_user",
+			"age":   25,
+			"email": "test@example.com",
+		},
+	}
+
+	// 编码
+	encoded, err := encodeRowBinary(row)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	t.Logf("Encoded size: %d bytes", len(encoded))
+
+	// 解码
+	decoded, err := decodeRowBinary(encoded)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// 验证
+	if decoded.Seq != row.Seq {
+		t.Errorf("Seq mismatch: expected %d, got %d", row.Seq, decoded.Seq)
+	}
+	if decoded.Time != row.Time {
+		t.Errorf("Time mismatch: expected %d, got %d", row.Time, decoded.Time)
+	}
+	if decoded.Data["name"] != row.Data["name"] {
+		t.Errorf("Name mismatch")
+	}
+
+	t.Log("Binary encoding test passed!")
+}
+
+func TestEncodingComparison(t *testing.T) {
+	row := &Row{
+		Seq:  12345,
+		Time: 1234567890,
+		Data: map[string]interface{}{
+			"name":  "test_user",
+			"age":   25,
+			"email": "test@example.com",
+		},
+	}
+
+	// 二进制编码
+	binaryEncoded, _ := encodeRowBinary(row)
+
+	// JSON 编码 (旧方式)
+	jsonData := map[string]interface{}{
+		"_seq":  row.Seq,
+		"_time": row.Time,
+		"data":  row.Data,
+	}
+	jsonEncoded, _ := json.Marshal(jsonData)
+
+	t.Logf("Binary size: %d bytes", len(binaryEncoded))
+	t.Logf("JSON size: %d bytes", len(jsonEncoded))
+	t.Logf("Space saved: %.1f%%", float64(len(jsonEncoded)-len(binaryEncoded))/float64(len(jsonEncoded))*100)
+
+	if len(binaryEncoded) >= len(jsonEncoded) {
+		t.Error("Binary encoding should be smaller than JSON")
+	}
+}
+
+func BenchmarkBinaryEncoding(b *testing.B) {
+	row := &Row{
+		Seq:  12345,
+		Time: 1234567890,
+		Data: map[string]interface{}{
+			"name":  "test_user",
+			"age":   25,
+			"email": "test@example.com",
+		},
+	}
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		encodeRowBinary(row)
+	}
+}
+
+func BenchmarkJSONEncoding(b *testing.B) {
+	row := &Row{
+		Seq:  12345,
+		Time: 1234567890,
+		Data: map[string]interface{}{
+			"name":  "test_user",
+			"age":   25,
+			"email": "test@example.com",
+		},
+	}
+
+	data := map[string]interface{}{
+		"_seq":  row.Seq,
+		"_time": row.Time,
+		"data":  row.Data,
+	}
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		json.Marshal(data)
+	}
+}