IPFS retrieval of cached content much slower when the node is online vs offline

[glitch003]

Checklist

• [X] This is a bug report, not a question. Ask questions on discuss.ipfs.io.
• [X] I have searched on the issue tracker for my bug.
• [X] I am running the latest kubo version or have an issue updating.

Installation method

ipfs-update or dist.ipfs.tech

Version

Kubo version: 0.16.0
Repo version: 12
System version: amd64/darwin
Golang version: go1.19.1

Config

{
  "API": {
    "HTTPHeaders": {}
  },
  "Addresses": {
    "API": "/ip4/127.0.0.1/tcp/5001",
    "Announce": [],
    "AppendAnnounce": [],
    "Gateway": "/ip4/127.0.0.1/tcp/8080",
    "NoAnnounce": [
      "/ip4/10.0.0.0/ipcidr/8",
      "/ip4/100.64.0.0/ipcidr/10",
      "/ip4/169.254.0.0/ipcidr/16",
      "/ip4/172.16.0.0/ipcidr/12",
      "/ip4/192.0.0.0/ipcidr/24",
      "/ip4/192.0.2.0/ipcidr/24",
      "/ip4/192.168.0.0/ipcidr/16",
      "/ip4/198.18.0.0/ipcidr/15",
      "/ip4/198.51.100.0/ipcidr/24",
      "/ip4/203.0.113.0/ipcidr/24",
      "/ip4/240.0.0.0/ipcidr/4",
      "/ip6/100::/ipcidr/64",
      "/ip6/2001:2::/ipcidr/48",
      "/ip6/2001:db8::/ipcidr/32",
      "/ip6/fc00::/ipcidr/7",
      "/ip6/fe80::/ipcidr/10"
    ],
    "Swarm": [
      "/ip4/0.0.0.0/tcp/4001",
      "/ip6/::/tcp/4001",
      "/ip4/0.0.0.0/udp/4001/quic",
      "/ip6/::/udp/4001/quic"
    ]
  },
  "AutoNAT": {},
  "Bootstrap": [
    "/dnsaddr/bootstrap.libp2p.io/p2p/QmbLHAnMoJPWSCR5Zhtx6BHJX9KiKNN6tpvbUcqanj75Nb",
    "/dnsaddr/bootstrap.libp2p.io/p2p/QmcZf59bWwK5XFi76CZX8cbJ4BhTzzA3gU1ZjYZcYW3dwt",
    "/ip4/104.131.131.82/tcp/4001/p2p/QmaCpDMGvV2BGHeYERUEnRQAwe3N8SzbUtfsmvsqQLuvuJ",
    "/ip4/104.131.131.82/udp/4001/quic/p2p/QmaCpDMGvV2BGHeYERUEnRQAwe3N8SzbUtfsmvsqQLuvuJ",
    "/dnsaddr/bootstrap.libp2p.io/p2p/QmNnooDu7bfjPFoTZYxMNLWUQJyrVwtbZg5gBMjTezGAJN",
    "/dnsaddr/bootstrap.libp2p.io/p2p/QmQCU2EcMqAqQPR2i9bChDtGNJchTbq5TbXJJ16u19uLTa"
  ],
  "DNS": {
    "Resolvers": {}
  },
  "Datastore": {
    "BloomFilterSize": 0,
    "GCPeriod": "1h",
    "HashOnRead": false,
    "Spec": {
      "mounts": [
        {
          "child": {
            "path": "blocks",
            "shardFunc": "/repo/flatfs/shard/v1/next-to-last/2",
            "sync": true,
            "type": "flatfs"
          },
          "mountpoint": "/blocks",
          "prefix": "flatfs.datastore",
          "type": "measure"
        },
        {
          "child": {
            "compression": "none",
            "path": "datastore",
            "type": "levelds"
          },
          "mountpoint": "/",
          "prefix": "leveldb.datastore",
          "type": "measure"
        }
      ],
      "type": "mount"
    },
    "StorageGCWatermark": 90,
    "StorageMax": "10GB"
  },
  "Discovery": {
    "MDNS": {
      "Enabled": false
    }
  },
  "Experimental": {
    "AcceleratedDHTClient": false,
    "FilestoreEnabled": false,
    "GraphsyncEnabled": false,
    "Libp2pStreamMounting": false,
    "P2pHttpProxy": false,
    "StrategicProviding": false,
    "UrlstoreEnabled": false
  },
  "Gateway": {
    "APICommands": [],
    "HTTPHeaders": {
      "Access-Control-Allow-Headers": [
        "X-Requested-With",
        "Range",
        "User-Agent"
      ],
      "Access-Control-Allow-Methods": [
        "GET"
      ],
      "Access-Control-Allow-Origin": [
        "*"
      ]
    },
    "NoDNSLink": false,
    "NoFetch": false,
    "PathPrefixes": [],
    "PublicGateways": null,
    "RootRedirect": "",
    "Writable": false
  },
  "Identity": {
    "PeerID": "12D3KooWBrAECdKaJwejifJXxjXZQj3B5TeLLzTtyTN3BHf4pynD"
  },
  "Internal": {},
  "Ipns": {
    "RecordLifetime": "",
    "RepublishPeriod": "",
    "ResolveCacheSize": 128
  },
  "Migration": {
    "DownloadSources": [],
    "Keep": ""
  },
  "Mounts": {
    "FuseAllowOther": false,
    "IPFS": "/ipfs",
    "IPNS": "/ipns"
  },
  "Peering": {
    "Peers": null
  },
  "Pinning": {
    "RemoteServices": {}
  },
  "Plugins": {
    "Plugins": null
  },
  "Provider": {
    "Strategy": ""
  },
  "Pubsub": {
    "DisableSigning": false,
    "Router": ""
  },
  "Reprovider": {
    "Interval": "12h",
    "Strategy": "all"
  },
  "Routing": {
    "Methods": null,
    "Routers": null,
    "Type": "dht"
  },
  "StorageGCWatermark": "90",
  "StorageMax": "50G",
  "Swarm": {
    "AddrFilters": [
      "/ip4/10.0.0.0/ipcidr/8",
      "/ip4/100.64.0.0/ipcidr/10",
      "/ip4/169.254.0.0/ipcidr/16",
      "/ip4/172.16.0.0/ipcidr/12",
      "/ip4/192.0.0.0/ipcidr/24",
      "/ip4/192.0.2.0/ipcidr/24",
      "/ip4/192.168.0.0/ipcidr/16",
      "/ip4/198.18.0.0/ipcidr/15",
      "/ip4/198.51.100.0/ipcidr/24",
      "/ip4/203.0.113.0/ipcidr/24",
      "/ip4/240.0.0.0/ipcidr/4",
      "/ip6/100::/ipcidr/64",
      "/ip6/2001:2::/ipcidr/48",
      "/ip6/2001:db8::/ipcidr/32",
      "/ip6/fc00::/ipcidr/7",
      "/ip6/fe80::/ipcidr/10"
    ],
    "ConnMgr": {
      "GracePeriod": "20s",
      "HighWater": 900,
      "LowWater": 600,
      "Type": "basic"
    },
    "DisableBandwidthMetrics": false,
    "DisableNatPortMap": true,
    "RelayClient": {},
    "RelayService": {},
    "ResourceMgr": {},
    "Transports": {
      "Multiplexers": {},
      "Network": {},
      "Security": {}
    }
  }
}

Description

I'm running ipfs daemon and am retrieving a file over the localhost gateway. When my internet is turned on, it takes about 60 - 70ms to retrieve this file once it's cached. Simply turning off WiFi on my mac brings that time down to 5 - 25ms.

Why is the performance so much worse when the node is connected to the internet? Shouldn't the fact that it's cached mean it should be the same online or offline?

Is there a config option I can set to get the fast speeds even when my node is connected to the internet?

Here's a video demo using chrome: https://youtu.be/7BVuCc3xkLI

Thanks

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[guseggert]

Thank you for the amazing video. This does look like a problem, we are probably re-announcing the block in the sync path, which adds some extra latency when compared w/ offline mode. We probably shouldn't be doing this.

[Jorropo]

Before trying to investigate, I'll try to reproduce on linux, it might as well be the macos scheduler being bad at handling concurrent operations.

[BigLep]

@Jorropo : fine if not, but were you able to reproduce on Linux?

[BigLep]

@Jorropo : I assume you haven't had a chance to reproduce it on Linux.