Performance:
- Cache cuBLAS descriptors: pre-create matmul_desc + layouts + algo at init.
requestedAlgoCount=3 for better algorithm selection. Zero per-GEMM overhead.
- Per-branch workspace: 4 × 32MB separate workspace buffers for multi-stream
branch dispatch. Eliminates workspace contention on parallel execution.
Training stability:
- Remove hardcoded shrink-perturb that fired every epoch on short runs (3-5 epochs).
With epochs=5, interval = epochs/4 = 1 → fired every epoch, destroying epoch 1
learned weights. This caused Sharpe to collapse from +0.60 to -0.29 after epoch 1.
- Phase 3 shrink-perturb now uses config values (was hardcoded alpha=0.9, sigma=0.01).
- The config-defined shrink_perturb_interval=20 now controls all shrink-perturb timing.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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