{
  "title": "WarpSend small-file FTP comparison and large-file transfer records",
  "updated": "2026-09-26",
  "status": "historical_transfer_records",
  "source": "WarpSend transfer history, inspected September 26, 2026",
  "selection": "Three completed US-to-Germany Tunnel records above 200 MB/s; not a summary of all runs or a paired FTP comparison.",
  "metric": "Average speed displayed in transfer history, in decimal MB/s. Displayed durations are rounded and must not be used to recalculate speed.",
  "route": "Tunnel",
  "direction": "US to Germany",
  "filename": "large-2048mb.bin",
  "file_size_display": "2.15 GB",
  "results": [
    {
      "started_at": "2026-09-06T19:42:38+08:00",
      "status": "completed",
      "duration_display": "10 s",
      "average_speed_MB_per_s": 222.98
    },
    {
      "started_at": "2026-09-06T20:30:04+08:00",
      "status": "completed",
      "duration_display": "11 s",
      "average_speed_MB_per_s": 201.24
    },
    {
      "started_at": "2026-09-06T20:35:22+08:00",
      "status": "completed",
      "duration_display": "11 s",
      "average_speed_MB_per_s": 201.49
    }
  ],
  "method_url": "https://warpsend.io/blog/how-warp-send-achieves-618x-faster-than-ftp/",
  "small_file_benchmark": {
    "workload": {
      "files": 256,
      "bytes_per_file": 1048576,
      "total_bytes": 268435456
    },
    "environment": {
      "direction": "Germany to United States",
      "provider": "Linode",
      "vcpu_per_host": 2,
      "memory_gb_approx": 3.9,
      "rtt_ms_approx": 143,
      "packet_loss": "near-zero observed; no artificial loss or jitter",
      "tcp": "BBR, send and receive buffer maximum 128 MiB",
      "ftp": "unencrypted vsftpd + curl passive uploads",
      "warpsend": "direct endpoint tunnel with encryption and coordination"
    },
    "units": {
      "throughput": "MiB/s",
      "definition": "bytes / elapsed seconds / 1048576",
      "original_harness_label": "MB/s",
      "timing": "sender-command wall-clock, not the separate transfer-phase speed"
    },
    "provenance": {
      "kind": "curated extract from internal engineering records; not raw per-transfer logs",
      "ftp_record": "FTP vs tunnel vs shuttle — DE→US throughput benchmark (2026-07-10)",
      "warpsend_record": "Transport perf remediation — results (2026-07-11), After: quinn patch + smart placement, stock config",
      "selection": "July 11 three-run direct-tunnel set, before later same-day Shuttle concurrency rebalance",
      "ftp_reference": "July 10 reference was carried forward; FTP was not rerun alongside every July 11 sample"
    },
    "ftp": {
      "date": "2026-07-10",
      "throughput_mib_per_s": [
        0.61,
        0.61
      ],
      "median_mib_per_s": 0.61
    },
    "warpsend_tunnel": {
      "date": "2026-07-11",
      "throughput_mib_per_s": [
        25.6,
        23.4,
        24.6
      ],
      "median_mib_per_s": 24.6
    },
    "median_ratio": 40.32786885245902,
    "rounded_median_ratio": 40,
    "scope": "Historical small-file comparison on consecutive dates. Whole-command timing; separate from the September large-file transfer rates above."
  }
}