Import AITURK IDE 1.0.0-beta.1 from Hermes 63279301; preserve MIT license

apps/desktop/scripts/perf/scenarios/transcript.mjs

@@ -0,0 +1,50 @@
+// Large-transcript mount cost. New scenario (no prior script measured this):
+// loads N synthetic turns of mixed markdown into $messages and records the
+// mount→paint time plus any longtasks the mount blocks the main thread with.
+// This is the "open a long session" path — a first-impression latency.
+
+import { sleep } from '../lib/cdp.mjs'
+
+const OBSERVE = `
+  (() => {
+    window.__TM__ = { longtasks: [] }
+    try {
+      const po = new PerformanceObserver((l) => {
+        for (const e of l.getEntries()) window.__TM__.longtasks.push(e.duration)
+      })
+      po.observe({ entryTypes: ['longtask'] })
+      window.__TM__.po = po
+    } catch {}
+    return 'observing'
+  })()
+`
+
+export default {
+  name: 'transcript',
+  tier: 'ci',
+  description: 'Mount + paint cost of loading a long transcript.',
+  async run(cdp, opts = {}) {
+    const turns = Number(opts.turns ?? 200)
+
+    await cdp.send('Runtime.enable')
+    await cdp.eval(OBSERVE)
+
+    const mountMs = await cdp.eval(`window.__PERF_DRIVE__.loadTranscript(${turns})`)
+
+    // Let post-mount longtasks (content-visibility passes, virtualizer) settle.
+    await sleep(1500)
+
+    const longtasks = await cdp.eval('window.__TM__.longtasks')
+    await cdp.eval('try { window.__TM__.po && window.__TM__.po.disconnect() } catch {}')
+    await cdp.eval('window.__PERF_DRIVE__.reset()')
+
+    return {
+      metrics: {
+        transcript_mount_ms: Math.round(mountMs * 10) / 10,
+        transcript_longtask_ms: Math.round(longtasks.reduce((a, b) => a + b, 0) * 10) / 10,
+        transcript_longtask_max_ms: Math.round((longtasks.length ? Math.max(...longtasks) : 0) * 10) / 10
+      },
+      detail: { turns, messages: turns * 2, longtasks: longtasks.length }
+    }
+  }
+}