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         7.223       4.472     1.62x      41.7%
      32         6.365       4.063     1.57x      41.3%
      64        10.223       6.790     1.51x      41.9%

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