> koa-classic-server@3.0.0-alpha.0 test:performance
> jest __tests__/performance.test.js --runInBand

  console.warn
    [koa-classic-server] WARNING: hidden.dotFiles.default and/or hidden.dotDirs.default are not explicitly set.
      Since v3.0.0 the defaults are: dotFiles → "hidden", dotDirs → "visible".
      To suppress this warning, add to your configuration:
        hidden: { dotFiles: { default: 'hidden' }, dotDirs: { default: 'visible' } }
      (adjust values to match your desired behaviour)

      735 |         if (dotFilesImplicit || dotDirsImplicit) {
      736 |             _hiddenDefaultWarnEmitted = true;
    > 737 |             _logger.warn(...warnPayload(_logger,
          |                     ^
      738 |                 '[koa-classic-server] WARNING: hidden.dotFiles.default and/or hidden.dotDirs.default are not explicitly set.\n' +
      739 |                 '  Since v3.0.0 the defaults are: dotFiles → "hidden", dotDirs → "visible".\n' +
      740 |                 '  To suppress this warning, add to your configuration:\n' +

      at koaClassicServer (index.cjs:737:21)
      at Object.koaClassicServer (__tests__/performance.test.js:139:17)

  console.log
    
    📊 Small File (1KB) Benchmark:

      at Object.log (__tests__/performance.test.js:159:21)

  console.log
       Average: 2.09ms

      at Object.log (__tests__/performance.test.js:160:21)

  console.log
       Median:  1.66ms

      at Object.log (__tests__/performance.test.js:161:21)

  console.log
       Min:     1.40ms

      at Object.log (__tests__/performance.test.js:162:21)

  console.log
       Max:     22.92ms

      at Object.log (__tests__/performance.test.js:163:21)

  console.log
    
    📊 Medium File (100KB) Benchmark:

      at Object.log (__tests__/performance.test.js:178:21)

  console.log
       Average: 2.06ms

      at Object.log (__tests__/performance.test.js:179:21)

  console.log
       Median:  1.93ms

      at Object.log (__tests__/performance.test.js:180:21)

  console.log
       Min:     1.65ms

      at Object.log (__tests__/performance.test.js:181:21)

  console.log
       Max:     4.47ms

      at Object.log (__tests__/performance.test.js:182:21)

  console.log
    
    📊 Large File (1MB) Benchmark:

      at Object.log (__tests__/performance.test.js:197:21)

  console.log
       Average: 7.19ms

      at Object.log (__tests__/performance.test.js:198:21)

  console.log
       Median:  5.82ms

      at Object.log (__tests__/performance.test.js:199:21)

  console.log
       Min:     4.53ms

      at Object.log (__tests__/performance.test.js:200:21)

  console.log
       Max:     21.60ms

      at Object.log (__tests__/performance.test.js:201:21)

  console.log
    
    📊 Small Directory (100 files) Benchmark:

      at Object.log (__tests__/performance.test.js:219:21)

  console.log
       Average: 5.22ms

      at Object.log (__tests__/performance.test.js:220:21)

  console.log
       Median:  4.65ms

      at Object.log (__tests__/performance.test.js:221:21)

  console.log
       Min:     4.03ms

      at Object.log (__tests__/performance.test.js:222:21)

  console.log
       Max:     17.47ms

      at Object.log (__tests__/performance.test.js:223:21)

  console.log
    
    📊 Large Directory (1,000 files) Benchmark:

      at Object.log (__tests__/performance.test.js:237:21)

  console.log
       Average: 28.83ms

      at Object.log (__tests__/performance.test.js:238:21)

  console.log
       Median:  28.80ms

      at Object.log (__tests__/performance.test.js:239:21)

  console.log
       Min:     26.80ms

      at Object.log (__tests__/performance.test.js:240:21)

  console.log
       Max:     31.02ms

      at Object.log (__tests__/performance.test.js:241:21)

  console.log
       ⚠️  WARNING: This will be MUCH faster after async optimization

      at Object.log (__tests__/performance.test.js:244:21)

  console.log
    
    📊 Very Large Directory (10,000 files) Benchmark:

      at Object.log (__tests__/performance.test.js:258:21)

  console.log
       Average: 265.99ms

      at Object.log (__tests__/performance.test.js:259:21)

  console.log
       Median:  266.27ms

      at Object.log (__tests__/performance.test.js:260:21)

  console.log
       Min:     261.83ms

      at Object.log (__tests__/performance.test.js:261:21)

  console.log
       Max:     271.55ms

      at Object.log (__tests__/performance.test.js:262:21)

  console.log
       ⚠️  WARNING: Event loop BLOCKED during this operation!

      at Object.log (__tests__/performance.test.js:263:21)

  console.log
       ⚠️  Expected to drop to ~79.80ms after optimization

      at Object.log (__tests__/performance.test.js:264:21)

  console.log
    
    📊 10 Concurrent Small Files:

      at Object.log (__tests__/performance.test.js:281:21)

  console.log
       Total time: 13.28ms

      at Object.log (__tests__/performance.test.js:282:21)

  console.log
       Avg per request: 1.33ms

      at Object.log (__tests__/performance.test.js:283:21)

  console.log
    
    📊 5 Concurrent Directory Listings (100 files):

      at Object.log (__tests__/performance.test.js:300:21)

  console.log
       Total time: 18.73ms

      at Object.log (__tests__/performance.test.js:301:21)

  console.log
       Avg per request: 3.75ms

      at Object.log (__tests__/performance.test.js:302:21)

  console.log
       ⚠️  With current sync code, these run SEQUENTIALLY

      at Object.log (__tests__/performance.test.js:303:21)

  console.log
       ⚠️  After async optimization, will run in PARALLEL

      at Object.log (__tests__/performance.test.js:304:21)

  console.log
    
    📊 404 Not Found Benchmark:

      at Object.log (__tests__/performance.test.js:321:21)

  console.log
       Average: 1.26ms

      at Object.log (__tests__/performance.test.js:322:21)

  console.log
       Median:  1.11ms

      at Object.log (__tests__/performance.test.js:323:21)

  console.log
       Min:     0.92ms

      at Object.log (__tests__/performance.test.js:324:21)

  console.log
       Max:     3.88ms

      at Object.log (__tests__/performance.test.js:325:21)

  console.log
    
    📊 Memory Usage (10,000 files directory):

      at Object.log (__tests__/performance.test.js:347:21)

  console.log
       Heap used increase: 6.97 MB

      at Object.log (__tests__/performance.test.js:348:21)

  console.log
       External increase: 0.25 MB

      at Object.log (__tests__/performance.test.js:349:21)

  console.log
       Response size: 0.02 MB

      at Object.log (__tests__/performance.test.js:350:21)

  console.log
       ⚠️  Expected to reduce by ~30-40% after optimization

      at Object.log (__tests__/performance.test.js:351:21)

  console.log
    
    ======================================================================

      at Object.log (__tests__/performance.test.js:358:13)

  console.log
    📋 BASELINE BENCHMARK SUMMARY

      at Object.log (__tests__/performance.test.js:359:13)

  console.log
    ======================================================================

      at Object.log (__tests__/performance.test.js:360:13)

  console.log
    
    These results represent the CURRENT performance (v1.2.0)

      at Object.log (__tests__/performance.test.js:361:13)

  console.log
    After implementing optimizations, run this test again to see improvements.

      at Object.log (__tests__/performance.test.js:362:13)

  console.log
    Expected improvements after optimization:

      at Object.log (__tests__/performance.test.js:363:13)

  console.log
      ✓ Small files:        10-20% faster (async operations)

      at Object.log (__tests__/performance.test.js:364:13)

  console.log
      ✓ Large directories:  50-70% faster (async + array join)

      at Object.log (__tests__/performance.test.js:365:13)

  console.log
      ✓ Concurrent requests: 5-10x faster (non-blocking event loop)

      at Object.log (__tests__/performance.test.js:366:13)

  console.log
      ✓ Memory usage:       30-40% reduction (array join vs concatenation)

      at Object.log (__tests__/performance.test.js:367:13)

  console.log
      ✓ With HTTP caching:  80-95% faster (304 responses)

      at Object.log (__tests__/performance.test.js:368:13)

  console.log
    ======================================================================

      at Object.log (__tests__/performance.test.js:369:13)

PASS __tests__/performance.test.js
  Performance Benchmarks - BASELINE (v1.2.0)
    File Serving Performance
      ✓ Benchmark: Small file (1KB) - 100 iterations (215 ms)
      ✓ Benchmark: Medium file (100KB) - 50 iterations (107 ms)
      ✓ Benchmark: Large file (1MB) - 20 iterations (146 ms)
    Directory Listing Performance
      ✓ Benchmark: Small directory (100 files) - 50 iterations (264 ms)
      ✓ Benchmark: Large directory (1,000 files) - 20 iterations (579 ms)
      ✓ Benchmark: Very large directory (10,000 files) - 5 iterations (1333 ms)
    Concurrent Request Performance
      ✓ Benchmark: 10 concurrent small file requests (15 ms)
      ✓ Benchmark: 5 concurrent directory listings (100 files each) (21 ms)
    404 Not Found Performance
      ✓ Benchmark: Non-existent file - 50 iterations (65 ms)
    Memory Usage (Informational)
      ✓ Memory usage during large directory listing (269 ms)

Test Suites: 1 passed, 1 total
Tests:       10 passed, 10 total
Snapshots:   0 total
Time:        3.365 s, estimated 5 s
Ran all test suites matching __tests__/performance.test.js.