TASK 1 — KV CACHE BENCHMARK
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has_generate_cached=True
memory_profile=N/A (CPU/MPS)

 src_len   standard(s)   cached(s)   speedup   encoder%
      16         1.844       1.084     1.70x      41.2%
      32         1.580       1.133     1.39x      39.9%
      64         2.386       1.939     1.23x      39.7%

Saved graphs:
  - task1_time_comparison.png
  - task1_speedup.png
  - task1_encoder_cost.png