feat(voice): harden controller runtime

packages/voice/scripts/bench-speaker-queue.ts

@@ -0,0 +1,43 @@
+import { mkdtemp, rm } from "node:fs/promises"
+import { tmpdir } from "node:os"
+import { join } from "node:path"
+
+const directory = await mkdtemp(join(tmpdir(), "opencode-voice-bench-"))
+const binary = join(directory, "speaker-queue")
+const source = Bun.fileURLToPath(new URL("../src/duplex-audio.swift", import.meta.url))
+const compile = Bun.spawn(["swiftc", "-O", "-D", "QUEUE_BENCHMARK", source, "-o", binary], {
+  stdout: "ignore",
+  stderr: "pipe",
+})
+if ((await compile.exited) !== 0) {
+  console.error(await new Response(compile.stderr).text())
+  await rm(directory, { recursive: true })
+  process.exit(1)
+}
+
+const runs: Array<Record<string, number>> = []
+for (let index = 0; index < 8; index++) {
+  const process = Bun.spawn([binary], { stdout: "pipe", stderr: "inherit" })
+  const output = await new Response(process.stdout).text()
+  if ((await process.exited) !== 0) throw new Error(`benchmark run ${index + 1} failed`)
+  if (index === 0) continue
+  runs.push(
+    Object.fromEntries(
+      output
+        .split("\n")
+        .filter((line) => line.startsWith("METRIC "))
+        .map((line) => {
+          const [name, value] = line.slice(7).split("=")
+          return [name!, Number(value)]
+        }),
+    ),
+  )
+}
+await rm(directory, { recursive: true })
+
+for (const name of ["speaker_queue_median_ns", "speaker_queue_p99_ns", "speaker_queue_worst_ns"]) {
+  const values = runs.map((run) => run[name]!).sort((a, b) => a - b)
+  const median = values[Math.floor(values.length / 2)]!
+  console.log(`${name}: median=${median} range=${values[0]}..${values.at(-1)}`)
+  console.log(`METRIC ${name}=${median}`)
+}