Function parseArgs

benchmarks/navigation-memory.ts:64–140

Parse a small flag set without pulling benchmark-only dependencies into the app.

(argv: string[])

/** Parse a small flag set without pulling benchmark-only dependencies into the app. */
function parseArgs(argv: string[]): CliOptions {
  const options = { ...defaultOptions };

  for (let index = 0; index < argv.length; index += 1) {
    const arg = argv[index]!;
    if (arg === "--help" || arg === "-h") {
      console.log(
        `Usage: bun run benchmarks/navigation-memory.ts [options]\n\nOptions:\n  --navigations <n>         Key-driven hunk navigations (default ${defaultOptions.navigations})\n  --warmup-navigations <n>  Navigations ignored for trend analysis (default ${defaultOptions.warmupNavigations})\n  --sample-every <n>        Sample every N navigations (default ${defaultOptions.sampleEvery})\n  --file-count <n>          One-hunk files in the synthetic review (default ${defaultOptions.fileCount})\n  --lines-per-file <n>      Lines per synthetic file (default ${defaultOptions.linesPerFile})\n  --width <n>               Test renderer width (default ${defaultOptions.width})\n  --height <n>              Test renderer height (default ${defaultOptions.height})\n  --mode <bounce|forward>   Bounce avoids end-of-review no-ops (default ${defaultOptions.mode})\n  --no-gc                   Do not force Bun.gc before samples\n  --max-heap-growth-mb <n>  Fail if post-warmup heap grows beyond this (default ${defaultOptions.maxHeapGrowthMb})\n  --max-heap-slope-kb <n>   Fail if post-warmup heap slope exceeds this per navigation (default ${defaultOptions.maxHeapSlopeKb})\n  --max-rss-growth-mb <n>   Fail if post-warmup RSS grows beyond this (default ${defaultOptions.maxRssGrowthMb})\n  --json-out <path>         Write full sample summary JSON\n`,
      );
      process.exit(0);
    }

    const next = () => argv[++index];
    switch (arg) {
      case "--navigations":
        options.navigations = parseNumberOption(arg, next());
        break;
      case "--warmup-navigations":
        options.warmupNavigations = parseNumberOption(arg, next());
        break;
      case "--sample-every":
        options.sampleEvery = parseNumberOption(arg, next());
        break;
      case "--file-count":
        options.fileCount = parseNumberOption(arg, next());
        break;
      case "--lines-per-file":
        options.linesPerFile = parseNumberOption(arg, next());
        break;
      case "--width":
        options.width = parseNumberOption(arg, next());
        break;
      case "--height":
        options.height = parseNumberOption(arg, next());
        break;
      case "--mode": {
        const mode = next();
        if (mode !== "bounce" && mode !== "forward") {
          throw new Error("Expected --mode to be either bounce or forward.");
        }
        options.mode = mode;
        break;
      }
      case "--no-gc":
        options.gc = false;
        break;
      case "--max-heap-growth-mb":
        options.maxHeapGrowthMb = parseNumberOption(arg, next());
        break;
      case "--max-heap-slope-kb":
        options.maxHeapSlopeKb = parseNumberOption(arg, next());
        break;
      case "--max-rss-growth-mb":
        options.maxRssGrowthMb = parseNumberOption(arg, next());
        break;
      case "--json-out":
        options.jsonOut = next();
        if (!options.jsonOut) {