Docs: Update benchmark results

tests/9_stream_visualizer/outputs/openai_gpt-5.1-chat.js

@@ -0,0 +1,23 @@
+export async function createStreamVisualizer(iter, o) {
+  const { maxPoints, alpha, width, height, yDomain } = o
+  const d3 = await import('https://cdn.jsdelivr.net/npm/d3@7/+esm')
+  const data = []
+  let ema
+  for await (const { timestamp, value } of iter) {
+    ema = ema == null ? value : alpha * value + (1 - alpha) * ema
+    data.push({ timestamp, value, ema })
+    if (data.length > maxPoints) data.shift()
+  }
+  const xs = d3.scaleLinear()
+    .domain([data[0].timestamp, data[data.length - 1].timestamp])
+    .range([0, width])
+  const ys = d3.scaleLinear()
+    .domain(yDomain)
+    .range([height, 0])
+  const line = d3.line()
+    .x(d => xs(d.timestamp))
+    .y(d => ys(d.ema))
+  const path = line(data) || ''
+  return { data, path }
+}
+export default createStreamVisualizer;