Weight fusion at load time:
- q/k/v_proj → single qkv_proj_wt, GEMV once then narrow() to split
- gate/up_proj → single gate_up_proj_wt, same pattern
- Reduces GEMV calls from 7 to 4 per layer (36 layers → 108 fewer launches)
Batched decode refactor (forward_decode_paged):
- Per-head RMSNorm: reshape to [B*H, D], one rmsnorm call
- Batched RoPE: one call for all sequences
- Batched KV scatter: one reshape_and_cache kernel per layer
- Eliminates the per-sequence loop entirely
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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