Function BenchmarkSingleDownloader

internal/engine/single/downloader_test.go:714–748

============================================================================= Benchmarks =============================================================================

(b *testing.B)

// =============================================================================

func BenchmarkSingleDownloader(b *testing.B) {
	tmpDir, cleanup, _ := testutil.TempDir("surge-bench-single")
	defer cleanup()

	fileSize := int64(10 * types.MB)
	server := testutil.NewMockServer(
		testutil.WithFileSize(fileSize),
		testutil.WithRangeSupport(false),
	)
	defer server.Close()

	destPath := filepath.Join(tmpDir, "bench_single.bin")
	state := types.NewProgressState("bench-single", fileSize)
	runtime := &types.RuntimeConfig{}

	downloader := NewSingleDownloader("bench-id", nil, state, runtime)

	b.ResetTimer()
	b.ReportAllocs()

	for i := 0; i < b.N; i++ {
		ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
		// Pre-create incomplete file (simulating processing layer)
		if f, err := os.Create(destPath + ".surge"); err == nil {
			_ = f.Close()
		}

		err := downloader.Download(ctx, server.URL(), destPath, fileSize, "bench.bin")
		if err != nil {
			b.Fatalf("Download failed: %v", err)
		}
		cancel()
		_ = os.Remove(destPath)
	}
}

func TestSingleDownloader_Download_BootstrapSize(t *testing.T) {
	tmpDir, cleanup, _ := testutil.TempDir("surge-bootstrap-single")