Docs: Update benchmark for anthropic/claude-opus-4.8 EFF:medium

tests/9_stream_visualizer/outputs/anthropic_claude-opus-4.8 EFF_medium.js

@@ -0,0 +1,22 @@
+async function createStreamVisualizer(asyncIterable, options) {
+  const { maxPoints, alpha, width, height, yDomain } = options;
+  const { scaleLinear, line } = await import("https://cdn.skypack.dev/d3");
+  const data = [];
+  let prevEma;
+  for await (const value of asyncIterable) {
+    prevEma = prevEma === undefined ? value : alpha * value + (1 - alpha) * prevEma;
+    data.push({ timestamp: Date.now(), value, ema: prevEma });
+    if (data.length > maxPoints) data.splice(0, data.length - maxPoints);
+  }
+  const x = scaleLinear()
+    .domain([data[0]?.timestamp ?? 0, data.at(-1)?.timestamp ?? 1])
+    .range([0, width]);
+  const y = scaleLinear().domain(yDomain).range([height, 0]);
+  const path = line()
+    .x(d => x(d.timestamp))
+    .y(d => y(d.ema))(data) ?? "";
+  return { data, path };
+}
+export default createStreamVisualizer;
+// Generation time: 4.318s
+// Result: FAIL