> koa-classic-server@1.2.0 test:performance
> jest __tests__/performance.test.js --runInBand

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

      at Object.log (__tests__/performance.test.js:90:21)

  console.log
       Average: 2.93ms

      at Object.log (__tests__/performance.test.js:91:21)

  console.log
       Median:  2.48ms

      at Object.log (__tests__/performance.test.js:92:21)

  console.log
       Min:     1.90ms

      at Object.log (__tests__/performance.test.js:93:21)

  console.log
       Max:     25.14ms

      at Object.log (__tests__/performance.test.js:94:21)

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

      at Object.log (__tests__/performance.test.js:109:21)

  console.log
       Average: 3.13ms

      at Object.log (__tests__/performance.test.js:110:21)

  console.log
       Median:  3.15ms

      at Object.log (__tests__/performance.test.js:111:21)

  console.log
       Min:     2.31ms

      at Object.log (__tests__/performance.test.js:112:21)

  console.log
       Max:     4.11ms

      at Object.log (__tests__/performance.test.js:113:21)

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

      at Object.log (__tests__/performance.test.js:128:21)

  console.log
       Average: 8.76ms

      at Object.log (__tests__/performance.test.js:129:21)

  console.log
       Median:  9.85ms

      at Object.log (__tests__/performance.test.js:130:21)

  console.log
       Min:     5.79ms

      at Object.log (__tests__/performance.test.js:131:21)

  console.log
       Max:     11.72ms

      at Object.log (__tests__/performance.test.js:132:21)

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

      at Object.log (__tests__/performance.test.js:150:21)

  console.log
       Average: 2.68ms

      at Object.log (__tests__/performance.test.js:151:21)

  console.log
       Median:  2.53ms

      at Object.log (__tests__/performance.test.js:152:21)

  console.log
       Min:     2.22ms

      at Object.log (__tests__/performance.test.js:153:21)

  console.log
       Max:     4.79ms

      at Object.log (__tests__/performance.test.js:154:21)

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

      at Object.log (__tests__/performance.test.js:168:21)

  console.log
       Average: 9.49ms

      at Object.log (__tests__/performance.test.js:169:21)

  console.log
       Median:  9.16ms

      at Object.log (__tests__/performance.test.js:170:21)

  console.log
       Min:     8.20ms

      at Object.log (__tests__/performance.test.js:171:21)

  console.log
       Max:     11.49ms

      at Object.log (__tests__/performance.test.js:172:21)

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

      at Object.log (__tests__/performance.test.js:175:21)

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

      at Object.log (__tests__/performance.test.js:189:21)

  console.log
       Average: 90.06ms

      at Object.log (__tests__/performance.test.js:190:21)

  console.log
       Median:  90.14ms

      at Object.log (__tests__/performance.test.js:191:21)

  console.log
       Min:     87.00ms

      at Object.log (__tests__/performance.test.js:192:21)

  console.log
       Max:     93.29ms

      at Object.log (__tests__/performance.test.js:193:21)

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

      at Object.log (__tests__/performance.test.js:194:21)

  console.log
       ⚠️  Expected to drop to ~27.02ms after optimization

      at Object.log (__tests__/performance.test.js:195:21)

  console.log
    
    📊 10 Concurrent Small Files:

      at Object.log (__tests__/performance.test.js:212:21)

  console.log
       Total time: 14.35ms

      at Object.log (__tests__/performance.test.js:213:21)

  console.log
       Avg per request: 1.43ms

      at Object.log (__tests__/performance.test.js:214:21)

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

      at Object.log (__tests__/performance.test.js:231:21)

  console.log
       Total time: 7.26ms

      at Object.log (__tests__/performance.test.js:232:21)

  console.log
       Avg per request: 1.45ms

      at Object.log (__tests__/performance.test.js:233:21)

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

      at Object.log (__tests__/performance.test.js:234:21)

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

      at Object.log (__tests__/performance.test.js:235:21)

  console.log
    
    📊 404 Not Found Benchmark:

      at Object.log (__tests__/performance.test.js:252:21)

  console.log
       Average: 1.53ms

      at Object.log (__tests__/performance.test.js:253:21)

  console.log
       Median:  1.43ms

      at Object.log (__tests__/performance.test.js:254:21)

  console.log
       Min:     1.24ms

      at Object.log (__tests__/performance.test.js:255:21)

  console.log
       Max:     3.80ms

      at Object.log (__tests__/performance.test.js:256:21)

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

      at Object.log (__tests__/performance.test.js:278:21)

  console.log
       Heap used increase: 0.96 MB

      at Object.log (__tests__/performance.test.js:279:21)

  console.log
       External increase: 2.54 MB

      at Object.log (__tests__/performance.test.js:280:21)

  console.log
       Response size: 1.29 MB

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

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

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

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

      at Object.log (__tests__/performance.test.js:289:13)

  console.log
    📋 BASELINE BENCHMARK SUMMARY

      at Object.log (__tests__/performance.test.js:290:13)

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

      at Object.log (__tests__/performance.test.js:291:13)

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

      at Object.log (__tests__/performance.test.js:292:13)

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

      at Object.log (__tests__/performance.test.js:293:13)

  console.log
    Expected improvements after optimization:

      at Object.log (__tests__/performance.test.js:294:13)

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

      at Object.log (__tests__/performance.test.js:295:13)

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

      at Object.log (__tests__/performance.test.js:296:13)

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

      at Object.log (__tests__/performance.test.js:297:13)

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

      at Object.log (__tests__/performance.test.js:298:13)

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

      at Object.log (__tests__/performance.test.js:299:13)

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

      at Object.log (__tests__/performance.test.js:300:13)

PASS __tests__/performance.test.js
  Performance Benchmarks - BASELINE (v1.2.0)
    File Serving Performance
      ✓ Benchmark: Small file (1KB) - 100 iterations (322 ms)
      ✓ Benchmark: Medium file (100KB) - 50 iterations (160 ms)
      ✓ Benchmark: Large file (1MB) - 20 iterations (178 ms)
    Directory Listing Performance
      ✓ Benchmark: Small directory (100 files) - 50 iterations (136 ms)
      ✓ Benchmark: Large directory (1,000 files) - 20 iterations (192 ms)
      ✓ Benchmark: Very large directory (10,000 files) - 5 iterations (454 ms)
    Concurrent Request Performance
      ✓ Benchmark: 10 concurrent small file requests (17 ms)
      ✓ Benchmark: 5 concurrent directory listings (100 files each) (9 ms)
    404 Not Found Performance
      ✓ Benchmark: Non-existent file - 50 iterations (79 ms)
    Memory Usage (Informational)
      ✓ Memory usage during large directory listing (90 ms)

Test Suites: 1 passed, 1 total
Tests:       10 passed, 10 total
Snapshots:   0 total
Time:        2.781 s, estimated 4 s
Ran all test suites matching /__tests__\/performance.test.js/i.