Issues

• Fix ARM SME test infrastructure: handle TC != TI in quantized kernels

  sonos/tract#2933 · Filter by author czoli1976 opened on Sep 25, 2026
  3

• Runtime shape symbols from NonZero don't resolve inside Scan bodies: symbol consumers can evaluate before their producer

  sonos/tract#2931 · Filter by author willwade opened on Sep 25, 2026
  3

• PP-OCRv6 gains 1.5x from 12 threads: only the matmul and the element-wise ops use the pool

  sonos/tract#2899 · Filter by author TarikAlHadethi opened on Sep 19, 2026
  1

• --threads 1 is not single threaded: a one-thread pool falls through to rayon's global pool

  sonos/tract#2894 · Filter by author TarikAlHadethi opened on Sep 17, 2026

• Kernels the #2771 slices leave in tract-core, to move to linalg routines

  sonos/tract#2836 · Filter by author TarikAlHadethi opened on Sep 11, 2026
  1

• ONNX GRU/LSTM/RNN: activations, clip and input_forget are silently ignored

  sonos/tract#2751 · Filter by author czoli1976 opened on Aug 31, 2026
  6

• PP-OCRv6 on x86-64/AVX2: tract is 2.3-3x ORT on recognition, 5.5-7x on detection

  sonos/tract#2739 · Filter by author TarikAlHadethi opened on Aug 28, 2026
  1

• ONNX import: fractional literals in dim_param are parsed with integer division, silently changing the shape expression (blocks all paddle2onnx models)

  sonos/tract#2724 · Filter by author TarikAlHadethi opened on Aug 25, 2026
  13

• onnx: dynamic If with branches of different shapes fails to analyse (Impossible to unify Val(5) with Val(0))

  sonos/tract#2695 · Filter by author ikrivosheev opened on Aug 21, 2026

• core/cnn: rank-1 small-kernel convs miss both should_use_lazy rules, ~6-8% on streaming audio models

  sonos/tract#2666 · Filter by author czoli1976 opened on Aug 18, 2026

• onnx: no sequence-type support blocks models using SplitToSequence / SequenceAt

  sonos/tract#2665 · Filter by author czoli1976 opened on Aug 18, 2026

• CLI: cannot bind graph symbols before analysis, and broadcast(sym, sym) does not simplify

  sonos/tract#2650 · Filter by author czoli1976 opened on Aug 17, 2026

• ONNX import: MatMulNBits rejects a weight behind a Reshape (tied lm_head in ORT-GenAI exports)

  sonos/tract#2649 · Filter by author czoli1976 opened on Aug 17, 2026

• Fusing a GRU Scan into one op: what should happen to tract-managed cross-call state?

  sonos/tract#2629 · Filter by author czoli1976 opened on Aug 12, 2026
  6

  

• Metadata-only ops deep-copy inside Scan bodies: 14x cost, ~10% of frame on streaming RNN models

  sonos/tract#2625 · Filter by author czoli1976 opened on Aug 12, 2026

• Binary elementwise fast paths gated at 32 elements: ~20% left on small-tensor graphs

  sonos/tract#2619 · Filter by author czoli1976 opened on Aug 12, 2026
  1

• Proposal: cargo features to trim tract-core op families (binary size on edge / wasm)

  sonos/tract#2607 · Filter by author czoli1976 opened on Aug 10, 2026

• f16 matmul always accumulates in f16, even where an f32-accumulating kernel already exists

  sonos/tract#2588 · Filter by author czoli1976 opened on Aug 4, 2026
  1

• arm64: fused f32 GELU returns 0.5*x*2^-23 instead of 0 for large negative x

  sonos/tract#2569 · Filter by author czoli1976 opened on Aug 3, 2026

• metal: M5 Neural Accelerator SDPA is written but needs M5 hardware to validate

  sonos/tract#2548 · Filter by author czoli1976 opened on Aug 1, 2026

• Native-FP16 SiLU cannot simply reuse current FP16 sigmoid polynomial

  sonos/tract#2509 · Filter by author cverrier opened on Jul 22, 2026

• Qwen2.5-7B-Instruct-q40ef16: NaN logits (always on CPU, input-dependent on Metal); Qwen3-1.7B-q40ef16 is fine

  sonos/tract#2475 · Filter by author czoli1976 opened on Jul 14, 2026
  6

• Dis-tract: Distributed Tract

  sonos/tract#2465 · Filter by author czoli1976 opened on Jul 13, 2026
  8

• Possible unsound safe function

  sonos/tract#2383 · Filter by author charlesxsh opened on Jun 17, 2026

• ONNX import: GroupQueryAttention do_rotary + decode KV cache (ORT-GenAI fused exports, e.g. Gemma-3)

  sonos/tract#2345 · Filter by author czoli1976 opened on Jun 4, 2026