Stream decompressed data for gzip

[adam-singer]

Performance Test for build_tar.py Gzip Streaming
==================================================

Running standard tests (1MB, 10MB, 50MB)...

To include 1GB test, run:
    LARGE_TESTS=1 python3 tests/test_build_tar_performance.py


test_actual_tarfile_write_temp_file (__main__.GzipPerformanceTest)
Test the actual TarFile.write_temp_file method implementation. ... 
[INFO] Including 1GB test (LARGE_TESTS enabled)

================================================================================
TESTING ACTUAL TarFile.write_temp_file METHOD
================================================================================

Testing with 10MB compressed data (.gz suffix)...
  ✓ Decompressed 45,794 bytes to 10,485,760 bytes
  ✓ Time taken: 15.55ms
  ✓ Output matches original data

Testing with non-compressed data (no .gz suffix)...
  ✓ Wrote 14,000 bytes directly to temp file
  ✓ Time taken: 0.17ms
  ✓ Output matches input data
  ✓ Non-gz case works correctly!

================================================================================

ok
test_correctness_verification (__main__.GzipPerformanceTest)
Verify that both approaches produce identical output. ... 
[INFO] Including 1GB test (LARGE_TESTS enabled)

================================================================================
CORRECTNESS VERIFICATION TEST
================================================================================

Verifying 1MB...
  ✓ Both approaches produce identical 1,048,576 byte output

Verifying 10MB...
  ✓ Both approaches produce identical 10,485,760 byte output

================================================================================

ok
test_gzip_streaming_performance (__main__.GzipPerformanceTest)
Compare performance of old vs new gzip decompression approach. ... 
[INFO] Including 1GB test (LARGE_TESTS enabled)

================================================================================
GZIP STREAMING PERFORMANCE TEST
================================================================================

1MB Test Data:
  Original size: 1,048,576 bytes
  Compressed size: 4,615 bytes
  Compression ratio: 227.21x

  Old approach (load into memory):
    Avg time: 1.38ms
    Min time: 1.30ms
    Max time: 1.57ms

  New approach (streaming):
    Avg time: 1.43ms
    Min time: 1.41ms
    Max time: 1.45ms

  Performance improvement: -3.6%
  Speedup: 0.96x

10MB Test Data:
  Original size: 10,485,760 bytes
  Compressed size: 45,794 bytes
  Compression ratio: 228.98x

  Old approach (load into memory):
    Avg time: 13.90ms
    Min time: 12.83ms
    Max time: 18.00ms

  New approach (streaming):
    Avg time: 13.29ms
    Min time: 13.25ms
    Max time: 13.36ms

  Performance improvement: 4.4%
  Speedup: 1.05x

50MB Test Data:
  Original size: 52,428,800 bytes
  Compressed size: 228,819 bytes
  Compression ratio: 229.13x

  Old approach (load into memory):
    Avg time: 94.88ms
    Min time: 91.77ms
    Max time: 96.58ms

  New approach (streaming):
    Avg time: 66.92ms
    Min time: 66.13ms
    Max time: 68.12ms

  Performance improvement: 29.5%
  Speedup: 1.42x

1GB Test Data:
  Original size: 1,073,741,824 bytes
  Compressed size: 4,685,486 bytes
  Compression ratio: 229.16x

  Old approach (load into memory):
    Avg time: 1939.87ms
    Min time: 1923.62ms
    Max time: 1952.15ms

  New approach (streaming):
    Avg time: 1348.20ms
    Min time: 1345.43ms
    Max time: 1353.72ms

  Performance improvement: 30.5%
  Speedup: 1.44x

================================================================================
SUMMARY
================================================================================
1MB: -3.6% faster (0.96x speedup)
10MB: 4.4% faster (1.05x speedup)
50MB: 29.5% faster (1.42x speedup)
1GB: 30.5% faster (1.44x speedup)
================================================================================

ok

----------------------------------------------------------------------
Ran 3 tests in 27.299s

OK

[adam-singer]

While this is useful for us, we don't use this code path afaict.