Hermes-agent

2026-06-14 14:30:48 -04:00
commit dac4b88b94
5058 changed files with 1884848 additions and 0 deletions
@@ -0,0 +1,191 @@
+#!/usr/bin/env node
+// Long-running stream profile + frame-rate timeline. Submits a prompt that
+// asks for ~30 paragraphs of output, then captures both a CPU profile and
+// a per-100ms frame counter so we can see if FPS sags as the message grows.
+
+import { writeFileSync } from 'node:fs'
+
+const args = Object.fromEntries(
+  process.argv.slice(2).flatMap(s => {
+    const m = s.match(/^--([^=]+)(?:=(.*))?$/)
+    return m ? [[m[1], m[2] ?? true]] : []
+  })
+)
+const PORT = Number(args.port ?? 9222)
+const OUT = String(args.out ?? `/tmp/hermes-long-stream-${Date.now()}`)
+const STREAM_SEC = Number(args.seconds ?? 25)
+
+async function pickRenderer() {
+  const list = await (await fetch(`http://127.0.0.1:${PORT}/json/list`)).json()
+  return list.find(t => t.type === 'page' && t.url.startsWith('http'))
+}
+
+function connect(url) {
+  return new Promise((resolve, reject) => {
+    const ws = new WebSocket(url)
+    let id = 0
+    const pending = new Map()
+    ws.addEventListener('open', () =>
+      resolve({
+        send(method, params = {}) {
+          const myId = ++id
+          ws.send(JSON.stringify({ id: myId, method, params }))
+          return new Promise((res, rej) => pending.set(myId, { res, rej }))
+        },
+        close: () => ws.close()
+      })
+    )
+    ws.addEventListener('error', reject)
+    ws.addEventListener('message', ev => {
+      const m = JSON.parse(typeof ev.data === 'string' ? ev.data : ev.data.toString('utf8'))
+      if (m.id != null) {
+        const p = pending.get(m.id)
+        if (!p) return
+        pending.delete(m.id)
+        m.error ? p.rej(new Error(m.error.message)) : p.res(m.result)
+      }
+    })
+  })
+}
+
+async function evalP(cdp, expr) {
+  const r = await cdp.send('Runtime.evaluate', { expression: expr, returnByValue: true })
+  if (r.exceptionDetails) throw new Error(r.exceptionDetails.text)
+  return r.result.value
+}
+
+async function main() {
+  const tgt = await pickRenderer()
+  console.log('target', tgt.url)
+  const cdp = await connect(tgt.webSocketDebuggerUrl)
+  await cdp.send('Runtime.enable')
+  await cdp.send('Profiler.enable')
+  await cdp.send('Performance.enable')
+
+  // Submit a long-form prompt
+  await evalP(
+    cdp,
+    `(() => {
+      const el = document.querySelector('[data-slot="composer-rich-input"]')
+      el.focus()
+      const r = document.createRange(); r.selectNodeContents(el); r.collapse(false)
+      window.getSelection().removeAllRanges(); window.getSelection().addRange(r)
+    })()`
+  )
+  const prompt = 'write 15 paragraphs about gpu memory bandwidth, memory hierarchies, roofline model, and how modern transformer inference benefits from these. include diagrams in ascii where relevant. no code. fully detailed.'
+  for (const c of prompt) {
+    await cdp.send('Input.dispatchKeyEvent', { type: 'char', text: c, unmodifiedText: c })
+    await new Promise(r => setTimeout(r, 5))
+  }
+  await new Promise(r => setTimeout(r, 200))
+  await cdp.send('Input.dispatchKeyEvent', {
+    type: 'rawKeyDown', windowsVirtualKeyCode: 13, key: 'Enter', code: 'Enter', text: '\r', unmodifiedText: '\r'
+  })
+  await cdp.send('Input.dispatchKeyEvent', { type: 'keyUp', windowsVirtualKeyCode: 13, key: 'Enter', code: 'Enter' })
+
+  console.log('waiting for assistant…')
+  let streaming = false
+  for (let i = 0; i < 100; i++) {
+    const c = await evalP(cdp, `document.querySelectorAll('[data-slot="aui_assistant-message-root"]').length`)
+    if (c > 0) { streaming = true; break }
+    await new Promise(r => setTimeout(r, 100))
+  }
+  if (!streaming) {
+    console.error('no assistant message')
+    cdp.close()
+    return
+  }
+
+  // Install a per-rAF frame counter
+  await evalP(
+    cdp,
+    `(() => {
+      window.__fpsSamples = []
+      window.__fpsT0 = performance.now()
+      window.__fpsLast = performance.now()
+      window.__fpsFrameCount = 0
+      window.__fpsHistogram = []  // {t, fps, contentLen}
+      const tick = () => {
+        const now = performance.now()
+        const dt = now - window.__fpsLast
+        window.__fpsLast = now
+        window.__fpsFrameCount++
+        window.__fpsSamples.push({ t: now - window.__fpsT0, dt })
+        if (performance.now() - window.__fpsT0 < ${STREAM_SEC * 1000}) {
+          requestAnimationFrame(tick)
+        }
+      }
+      requestAnimationFrame(tick)
+      // Bucket fps every 500ms
+      window.__fpsBucket = setInterval(() => {
+        const now = performance.now()
+        const recentCount = window.__fpsSamples.filter(s => now - window.__fpsT0 - s.t < 500).length
+        const root = document.querySelector('[data-slot="aui_thread-content"]')
+        const len = root ? root.innerText.length : 0
+        const v = document.querySelector('[data-slot="aui_thread-viewport"]')
+        window.__fpsHistogram.push({
+          t: now - window.__fpsT0,
+          frames500ms: recentCount,
+          fps: recentCount * 2,
+          contentLen: len,
+          scrollTop: v?.scrollTop ?? 0,
+          scrollHeight: v?.scrollHeight ?? 0
+        })
+      }, 500)
+    })()`
+  )
+
+  // Start CPU profile
+  await cdp.send('Profiler.setSamplingInterval', { interval: 1000 })
+  await cdp.send('Profiler.start')
+
+  await new Promise(r => setTimeout(r, STREAM_SEC * 1000))
+
+  const { profile } = await cdp.send('Profiler.stop')
+  await evalP(cdp, `clearInterval(window.__fpsBucket)`)
+
+  writeFileSync(`${OUT}.cpuprofile`, JSON.stringify(profile))
+  console.log(`cpu profile → ${OUT}.cpuprofile`)
+
+  // Pull fps histogram
+  const hist = JSON.parse(await evalP(cdp, `JSON.stringify(window.__fpsHistogram || [])`))
+  writeFileSync(`${OUT}.fps.json`, JSON.stringify(hist, null, 2))
+
+  console.log(`\n=== FPS over time ===`)
+  console.log(`  t(s)   fps   contentLen   scrollTop/scrollHeight`)
+  for (const h of hist) {
+    const bar = '█'.repeat(Math.min(40, Math.max(0, Math.round(h.fps / 2))))
+    console.log(`  ${(h.t / 1000).toFixed(1).padStart(5)}  ${String(h.fps).padStart(3)}  ${String(h.contentLen).padStart(10)}   ${h.scrollTop}/${h.scrollHeight}  ${bar}`)
+  }
+
+  // Top self frames
+  const total = (profile.endTime - profile.startTime) / 1000
+  const intMs = total / Math.max(1, profile.samples?.length ?? 1)
+  const counts = new Map()
+  for (const s of profile.samples ?? []) counts.set(s, (counts.get(s) ?? 0) + 1)
+  const rows = profile.nodes
+    .map(n => ({ id: n.id, fn: n.callFrame.functionName || '(anon)', url: n.callFrame.url || '', line: n.callFrame.lineNumber, self: counts.get(n.id) ?? 0 }))
+    .sort((a, b) => b.self - a.self)
+    .slice(0, 25)
+  console.log(`\n=== ${total.toFixed(0)}ms wall, ${profile.samples?.length ?? 0} samples (${intMs.toFixed(2)}ms each) ===`)
+  for (const r of rows) {
+    if (r.self === 0) break
+    const url = r.url.replace(/^.*\/src\//, 'src/').replace(/\?.*$/, '').slice(0, 70)
+    console.log(`  ${(r.self * intMs).toFixed(1).padStart(7)}ms  (${String(r.self).padStart(4)} samp)  ${r.fn.padEnd(45)} ${url}:${r.line}`)
+  }
+
+  await evalP(cdp, `
+    (() => {
+      for (const b of document.querySelectorAll('button')) {
+        if ((b.getAttribute('aria-label') || '').toLowerCase().includes('stop')) { b.click(); return }
+      }
+    })()
+  `)
+
+  cdp.close()
+}
+
+main().catch(e => {
+  console.error('fatal:', e.stack ?? e.message)
+  process.exit(1)
+})