Re-exported Qwen3-4B in hybrid mode (prefill_forward + kv_forward) with
num_sharding=1 after discovering that sharding=2 produces a multi-context
.pte that the LlmModule loader cannot restore (error 5010 "Context group 1
does not exist"). Single-context hybrid .pte loads cleanly through the JNI
runner and the auto-detected eval_mode=1 path.
The peak RAM during export hit 49 GB, which is why sharding=2 was used
originally — the /swapfile (192 GB) now absorbs it. Compile wall time with
sharding=1 + hybrid is ~73 min (two graphs) vs ~30 min for sharding=2 +
kv-only (one graph).
End-to-end on tablet, same 'Bonjour, comment vas-tu ?' prompt:
Before (kv-only, short prompt): TTFT 2865 ms, total 4034 ms
After (hybrid, short prompt): TTFT 113 ms, total 1471 ms
Gain: -2752 ms TTFT (96% reduction, 25× faster)
Response: "Bonjour ! Je vais bien, merci de me demander. Comment vas-tu ?"
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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