Speculative decoding stops picking layers by position: entropy and CKA choose the set, lifting accepted tokens by about 0.085 on Qwen3
Which target-model hidden layers a speculative-decoding draft model should see can now be chosen by information content and redundancy instead of a fixed positional rule; on Qwen3-4B-Instruct the selected three-layer set averages about 0.085 more accepted tokens than the EAGLE3 default.