docs: Parakeet TDT on tract is not an ort replacement - #90
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Shipping FP32 encoder and fused decoder_joint run on tract-onnx when shapes are bound; LSTM is explicit state ports, not an unfold. The weights-only INT8 encoder does not optimize. No RTFx or RSS win versus the companion's ONNX Runtime path. Keep ort isolated in polyvoice-asr.
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Shipping Parakeet TDT 0.6B v3 ONNX graphs were run on tract-onnx (same line as
backend-tract) and compared topolyvoice-transcribe/ ONNX Runtime on the 7.4 s LibriSpeech clip the sonos example uses.Result: do not move
polyvoice-asroff ONNX Runtime.decoder_jointrun when batch/time are bound. LSTM is explicit[2,1,640]state ports, not an unfold.MatMulNBits/ dynamic axes).wishdropped). Ort remains correct. Published long-file INT8 is 11.7×.Notes:
docs/parakeet-tract-measured.md,benchmarks/results/parakeet-tract-2026-09-21/. No production code.