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Normalize float16 late interaction embeddings - #826
IlyaKhalafi wants to merge 2 commits into
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| Check name | Status | Explanation | Resolution |
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| Docstring Coverage |  |
Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 9 functions across 3 files. | Write docstrings for the functions missing them to satisfy the coverage threshold. |
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Check name Status Explanation Title check The title clearly and concisely describes the main change: normalization of float16 late interaction embeddings. Description check The description directly explains the normalization fix, affected components, dtype behavior, tests, and linked issue. Linked Issues check The changes satisfy the coding requirements in [ #825].Colbert._post_process_onnx_outputandLateOn._post_process_onnx_outputuse the sharednormalizehelper after token filtering. The tests cov…Out of Scope Changes check The changes stay within [ #825]. Production changes replace unsafe late-interaction normalization. Supporting tests verify normalization, dtype retention, filtering, empty outputs, and query behavior. …Full details: Linked Issues check
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Explanation
The changes satisfy the coding requirements in [
#825].Colbert._post_process_onnx_outputandLateOn._post_process_onnx_outputuse the sharednormalizehelper after token filtering. The tests cover float16, float32, and float64 outputs, finite normalized values, zero and large vectors, retained-token filtering, empty retained outputs, and existing query behavior. The tests also verify dtype retention.
Full details: Out of Scope Changes check
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Explanation
The changes stay within [
#825]. Production changes replace unsafe late-interaction normalization. Supporting tests verify normalization, dtype retention, filtering, empty outputs, and query behavior. No unrelated production behavior or files are identified in the reviewed changes.
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Actionable comments posted: 1
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Inline comments:
Review comments at @tests/test_late_interaction_normalization.py:
- Line 15: Update the fixture to set `skip_list` by model class, preserving
MLateOn’s empty set while retaining `{9}` for models that skip token 9. Adjust
`test_padding_and_punctuation_are_still_filtered` to expect token ID 9 to remain
for MLateOn, and mask it in `test_documents_with_no_retained_tokens` so that
case still tests empty output.
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📒 Files selected for processing: 3
fastembed/late_interaction/colbert.pyfastembed/late_interaction/lateon.pytests/test_late_interaction_normalization.py
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This PR fixes nonfinite float16 embeddings in ColBERT and LateOn postprocessing. With this, local float16 exports keep their dtype and normalize correctly using the shared helper.
ColBERT normalizes each retained document separately to keep temporary memory bounded.
Fixes #825.
The full suite passes with 228 passed and 20 skipped. The 47 focused tests pass on Python 3.10, 3.12 and 3.14, along with the lint, formatting and type checks. Float16 coverage uses synthetic model outputs.