{
    "api": "YAML JSON TOON Database",
    "version": "1.0.0",
    "format": "json",
    "dataset": {
        "id": 2824,
        "slug": "http2-http3-features",
        "title": "HTTP\/2 and HTTP\/3 Features",
        "description": "Key features and improvements introduced in HTTP\/2 and HTTP\/3 over HTTP\/1.1.",
        "summary": "The features that distinguish HTTP\/2 and HTTP\/3 from HTTP\/1.1, each tagged with the version it belongs to and the problem it addresses: multiplexing, header compression, transport changes in QUIC and connection behavior on mobile networks.",
        "use_when": [
            "You are explaining why HTTP\/2 or HTTP\/3 helps a particular workload.",
            "You are deciding which protocol version to enable or what to measure after enabling it."
        ],
        "caveats": [
            "Gains depend on the workload and network; a single large download changes little, many small requests on a lossy network gain the most.",
            "Server push saw little adoption and was removed from major browsers, so treat it as a historical feature."
        ],
        "related": [
            "http-protocol-evolution",
            "network-ports-reference",
            "http-content-negotiation"
        ],
        "entry_count": 13,
        "fields": [
            {
                "section": "data",
                "field": "feature",
                "type": "string",
                "example": "Multiplexing"
            },
            {
                "section": "data",
                "field": "version",
                "type": "string",
                "example": "HTTP\/2"
            },
            {
                "section": "data",
                "field": "description",
                "type": "string",
                "example": "Multiple requests and responses over a single T\u2026"
            },
            {
                "section": "data",
                "field": "benefit",
                "type": "string",
                "example": "Eliminates head-of-line blocking."
            }
        ],
        "category": "Networking",
        "category_slug": "networking",
        "tags": "networking,http2,http3,protocols,performance",
        "view_count": 34,
        "created_at": 1793403093,
        "updated_at": 1793403093
    },
    "data": [
        {
            "feature": "Multiplexing",
            "version": "HTTP\/2",
            "description": "Multiple requests and responses over a single TCP connection.",
            "benefit": "Eliminates head-of-line blocking."
        },
        {
            "feature": "Header Compression (HPACK)",
            "version": "HTTP\/2",
            "description": "Compressed headers using a static and dynamic table.",
            "benefit": "Reduces overhead on every request."
        },
        {
            "feature": "Server Push",
            "version": "HTTP\/2",
            "description": "Server can push resources before the client requests them.",
            "benefit": "Reduces round trips for related resources."
        },
        {
            "feature": "Stream Prioritization",
            "version": "HTTP\/2",
            "description": "Requests can be assigned weight and dependency for ordering.",
            "benefit": "Critical resources can be delivered first."
        },
        {
            "feature": "QUIC Transport",
            "version": "HTTP\/3",
            "description": "Built on UDP instead of TCP for connection establishment.",
            "benefit": "Eliminates TCP handshake + TLS round trips."
        },
        {
            "feature": "0-RTT Resumption",
            "version": "HTTP\/3",
            "description": "Can resume connections with data from the first packet.",
            "benefit": "Faster page loads for returning users."
        },
        {
            "feature": "Connection Migration",
            "version": "HTTP\/3",
            "description": "Connections survive network changes (e.g., WiFi to LTE).",
            "benefit": "Seamless experience on mobile devices."
        },
        {
            "feature": "Binary Framing Layer",
            "version": "HTTP\/2",
            "description": "Messages are split into binary frames carried on numbered streams instead of text lines.",
            "benefit": "Enables multiplexing and cheaper, less ambiguous parsing."
        },
        {
            "feature": "Flow Control",
            "version": "HTTP\/2",
            "description": "Per-stream and per-connection windows limit how much data a sender may transmit.",
            "benefit": "Prevents one stream from starving others on a shared connection."
        },
        {
            "feature": "QPACK Header Compression",
            "version": "HTTP\/3",
            "description": "Header compression redesigned to work with out-of-order streams.",
            "benefit": "Keeps compression gains without HPACK's head-of-line blocking."
        },
        {
            "feature": "No Transport Head-of-Line Blocking",
            "version": "HTTP\/3",
            "description": "Streams are independent in QUIC, so a lost packet delays only its own stream.",
            "benefit": "Fewer stalls on lossy networks."
        },
        {
            "feature": "Built-in TLS 1.3",
            "version": "HTTP\/3",
            "description": "QUIC integrates the TLS 1.3 handshake into connection setup.",
            "benefit": "Fewer round trips before data flows, and encryption is mandatory."
        },
        {
            "feature": "Alt-Svc Discovery",
            "version": "HTTP\/3",
            "description": "A server advertises HTTP\/3 availability through the Alt-Svc header or an HTTPS DNS record.",
            "benefit": "Lets clients upgrade from TCP-based HTTP without a separate port."
        }
    ]
}