Function measureNavigation

benchmarks/interaction-latency.ts:27–49

Measure `]` per-press latency plus memory ceilings on a fresh renderer.

()

/** Measure `]` per-press latency plus memory ceilings on a fresh renderer. */
async function measureNavigation() {
  const setup = await testRender(
    React.createElement(AppHost, { bootstrap: createLargeSplitStreamBootstrap() }),
    INTERACTION_VIEWPORT,
  );

  try {
    const firstFrameStart = performance.now();
    await renderPass(setup);
    console.log(`METRIC first_frame_ms=${(performance.now() - firstFrameStart).toFixed(2)}`);
    printMemoryMetrics("after_first_frame");

    // Settle initial async work (selection reveal, highlight kick-off) so the
    // press latencies measure navigation, not startup spillover.
    await renderPass(setup, 2);

    const pressLatencies = await measureKeyPressLatencies(setup, "]", NAVIGATION_PRESSES);
    printLatencyMetrics("hunk_nav_press", pressLatencies);
    printMemoryMetrics("after_navigation");
  } finally {
    await destroyRenderer(setup);
  }
}

/** Measure per-scroll-tick latency on a fresh renderer (no navigation state). */
async function measureScrolling() {