-- No response hook: benchmarks must not be limited by Lua body processing.
-- Known payload/status/headers are verified separately before measurement.
done = function(summary, latency, requests)
  io.write("RUSTPROXY_BENCH_JSON {")
  io.write(string.format('"requests":%d,"duration_us":%d,"bytes":%d,',
    summary.requests, summary.duration, summary.bytes))
  io.write(string.format('"p50_us":%.3f,"p95_us":%.3f,"p99_us":%.3f,',
    latency:percentile(50), latency:percentile(95), latency:percentile(99)))
  io.write(string.format('"latency_mean_us":%.3f,"latency_max_us":%.3f,', latency.mean, latency.max))
  io.write(string.format('"errors_connect":%d,"errors_read":%d,"errors_write":%d,"errors_timeout":%d,"errors_status":%d',
    summary.errors.connect, summary.errors.read, summary.errors.write,
    summary.errors.timeout, summary.errors.status))
  io.write("}\n")
end