wingfoil 6.0.5

graph based stream processing framework
Documentation 
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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1" />
  <title>wingfoil latency end-to-end</title>
  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/uplot@1.6.31/dist/uPlot.min.css" />
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    #chart { width: 100%; }

    /* Flamegraph: nested rectangles, browser RTT at the bottom, FIX→LMAX at the top. */
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  </style>
</head>
<body>
  <header>
    <h1>wingfoil latency e2e</h1>
    <span class="byline">Rust DAG stream processor · live FIX round-trip to LMAX London</span>
    <span id="status" class="pill idle">disconnected</span>
    <span style="color:var(--muted);font-size:11px">session <code id="session">—</code></span>
    <div class="spacer"></div>
    <div class="ctl">
      <label>side
        <select id="side">
          <option value="alt">alt</option>
          <option value="0">buy</option>
          <option value="1">sell</option>
        </select>
      </label>
      <label>qty <input id="qty" type="number" min="1" value="1" style="width:50px"/></label>
      <label>Hz <input id="rate" type="number" min="1" max="20" value="2" style="width:42px"/></label>
      <button id="start">start</button>
    </div>
    <div class="links">
      <a href="https://github.com/wingfoil-io/wingfoil" target="_blank" rel="noopener">github</a>
      <a href="https://github.com/wingfoil-io/wingfoil/tree/main/wingfoil/examples/latency_e2e" target="_blank" rel="noopener">source</a>
      <a href="/metrics" target="_blank">prometheus</a>
    </div>
  </header>

  <main>
    <section class="panel chart-panel">
      <div class="panel-head">
        <h2>per-hop latency — this session</h2>
        <span class="meta" id="rtt-meta">—</span>
      </div>
      <div class="stats">
        <div class="stat"><div class="k">sent</div><div class="v" id="sent">0</div></div>
        <div class="stat"><div class="k">filled</div><div class="v" id="filled">0</div></div>
        <div class="stat"><div class="k">avg fill px</div><div class="v" id="px">—</div></div>
        <div class="stat"><div class="k">round-trip</div><div class="v" id="rtt">—</div></div>
      </div>
      <div class="breakdown">
        <div class="seg total"><div class="k">rtt mean <span class="hint">last 32 fills</span></div><div class="v" id="bd-total">—</div></div>
        <div class="seg resident"><div class="k">resident <span class="hint">ws_recv → ws_send (in-process)</span></div><div class="v" id="bd-resident">—</div></div>
        <div class="seg wire"><div class="k">wire <span class="hint">FIX/TLS to LMAX + WS legs</span></div><div class="v" id="bd-wire">—</div></div>
      </div>
      <div id="chart" style="margin-top:10px"></div>
      <details class="legend">
        <summary>how to read this</summary>
        <p>
          Each fill traverses nine wingfoil stamp points: <code>ws_recv → ws_publish → gw_recv → gw_price → fix_send → fix_recv → gw_publish → ws_sub_recv → ws_send</code>.
          The chart plots the per-hop delta on a log Y-axis (nanoseconds). The flamegraph below shows the nested call stack: browser at the bottom (full round-trip), each layer above is a strict sub-interval of the layer below — exactly like a CPU flamegraph, but the samples are wall-clock fills.
        </p>
        <p>
          <strong>Resident</strong> is everything inside this server (two processes connected by iceoryx2 shared memory). <strong>Wire</strong> is the FIX-over-TLS round-trip to LMAX plus the WebSocket legs to your browser — derived as <code>rtt_total − resident</code>, both measured in a single clock domain so no NTP sync is needed.
        </p>
      </details>
    </section>

    <section class="panel flamegraph-wrap">
      <div class="panel-head">
        <h2>flamegraph — nested call stack (rolling mean)</h2>
        <span class="meta" id="flamegraph-meta">n=0</span>
      </div>
      <canvas id="flamegraph" height="200"></canvas>
      <div id="flamegraph-tip"></div>
      <div class="flame-legend" id="flame-legend"></div>
    </section>

    <section class="panel grafana-wrap">
      <div class="panel-head">
        <h2>grafana — session traces</h2>
        <a id="grafana-pop" href="#" target="_blank" rel="noopener" style="font-size:11px">↗ open in new window</a>
      </div>
      <iframe id="grafana" title="Grafana — session traces"></iframe>
      <p class="grafana-note">
        Aggregate p50/p99 across all sessions are in Prometheus at
        <a href="/metrics" target="_blank"><code>:9091/metrics</code></a>.
        Per-session traces are pushed to Tempo via OTLP and pre-filtered to this session above.
        Not loading? <code>docker compose -f wingfoil/examples/latency_e2e/docker-compose.yml up -d</code>
      </p>
    </section>
  </main>

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</body>
</html>