onnx/optimizer

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ONNX Optimizer

Stars: 834
Forks: 109
Open beginner issues: 0
Indexed issues: 62
Avg merge: 6h 55m
Merged PRs (30d): 2

Dominant language: C++
License: Apache-2.0
Last GitHub push: Sep 1, 2026
Latest indexed: Sep 19, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: No beginner labels indexed

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62 open issues indexed

Demo to run onnx optimizer on browser Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

onnx/optimizer#291 · 1 comment · 1 reaction · Opened Feb 3, 2026
[BUG] The pass "eliminate_nop_with_unit" causes output mismatch Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

onnx/optimizer#285 · Opened Jan 27, 2026
[BUG] The pass "eliminate_nop_transpose" causes output mismatch Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

onnx/optimizer#284 · Opened Jan 27, 2026
[BUG] The pass "eliminate_nop_split" causes output mismatch Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

onnx/optimizer#283 · Opened Jan 27, 2026
[BUG] The pass "eliminate_nop_reshape" causes output mismatch Open

Difficulty 4/5 3-5 days Newbie friendliness 38/100

onnx/optimizer#282 · Opened Jan 27, 2026
[BUG] The pass "eliminate_nop_monotone_argmax" causes output mismatch Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

onnx/optimizer#281 · Opened Jan 27, 2026
[BUG] The pass "eliminate_shape_gather" causes output mismatch Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

onnx/optimizer#280 · Opened Jan 26, 2026
[BUG] The pass "eliminate_shape_op" causes output mismatch Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

onnx/optimizer#279 · Opened Jan 26, 2026
[BUG] The pass "eliminate_nop_pad" causes output mismatch Open

Difficulty 4/5 3-5 days Newbie friendliness 38/100

onnx/optimizer#278 · Opened Jan 26, 2026
[BUG] The pass "eliminate_nop_flatten" causes output mismatch Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

onnx/optimizer#276 · Opened Jan 26, 2026
[BUG] The pass "eliminate_nop_expand" causes output mismatch Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

onnx/optimizer#275 · Opened Jan 26, 2026
[BUG] The pass "eliminate_nop_dropout" causes output mismatch Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

onnx/optimizer#274 · Opened Jan 26, 2026
[BUG] The pass "eliminate_nop_cast" causes output mismatch Open

Difficulty 4/5 3-5 days Newbie friendliness 38/100

onnx/optimizer#273 · Opened Jan 26, 2026
[BUG] The pass "adjust_slice_and_matmul" causes crash (malloc_error_break) Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

onnx/optimizer#272 · Opened Jan 26, 2026
[BUG] The pass "fuse_pad_into_pool" causes output mismatch Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

onnx/optimizer#269 · Opened Jan 14, 2026
[BUG] The pass "fuse_concat_into_reshape" causes output mismatch Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

onnx/optimizer#267 · Opened Jan 14, 2026
[BUG] The pass "eliminate_slice_after_shape" causes great output mismatch Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

onnx/optimizer#263 · Opened Jan 12, 2026
[BUG] The pass "eliminate_shape_op" causes output mismatch Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

onnx/optimizer#262 · Opened Jan 12, 2026
[BUG] The Pass “eliminate_nop_pad" causes output mismatch Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

onnx/optimizer#261 · Opened Jan 12, 2026
[BUG] The Pass “eliminate_consecutive_idempotent_ops“ causes output mismatch Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

onnx/optimizer#259 · Opened Jan 11, 2026
[BUG] Pass “split_init“ produces invalid model (missing value_info.type) Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

onnx/optimizer#256 · Opened Jan 7, 2026
[BUG] Pass "fuse_bn_into_conv" causes output mismatch Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

onnx/optimizer#255 · Opened Jan 7, 2026
[BUG] Pass “eliminate_common_subexpression“ causes output mismatch Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

onnx/optimizer#254 · Opened Jan 7, 2026
[BUG] Pass "fuse_consecutive_squeezes" causes output mismatch Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

onnx/optimizer#253 · Opened Jan 6, 2026
[BUG] Pass "eliminate_nop_concat" causes output mismatch Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

onnx/optimizer#252 · 2 comments · Opened Jan 5, 2026
[BUG] The pass "split_predict" generates an invalid optimized ONNX model Open

onnx/optimizer#221 · 3 comments · 1 reaction · 2 assignees · Opened Dec 21, 2025
Add ONNX function test case Open

onnx/optimizer#194 · 1 assignee · Opened Jul 10, 2025
Paper about the optimizer Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

onnx/optimizer#188 · 2 comments · 1 reaction · Opened Jun 11, 2025
[BUG] Pass "fuse_bn_into_conv" results in problematic graph and affects results. Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

onnx/optimizer#178 · Opened Mar 26, 2025
[BUG] Issue with BatchNormalization node dimensions on VGG and DUC_HDC models (opset=7) Open

Difficulty 4/5 3-5 days Newbie friendliness 28/100

onnx/optimizer#177 · 1 comment · Opened Mar 26, 2025
Redundant initializers introduced to the models using eliminate passes. Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

onnx/optimizer#176 · Opened Mar 26, 2025
Pass "fuse_bn_into_conv" introduces duplicate initializer. Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

onnx/optimizer#174 · Opened Mar 26, 2025
Pass "eliminate_consecutive_idempotent_ops" succeeds but model gives an incompatible shape error upon run. Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

onnx/optimizer#171 · Opened Mar 19, 2025
Pass "rewrite_input_dtype" gives an error on GPT-2. Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

onnx/optimizer#170 · Opened Mar 18, 2025
[BUG] Pass "eliminate_shape_gather" results in a dimension size error. Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

onnx/optimizer#158 · Opened Mar 5, 2025
The "split" passes result in invalid models. Open

Difficulty 4/5 3-5 days Newbie friendliness 32/100

onnx/optimizer#157 · 1 comment · Opened Mar 4, 2025
The "lift_lexical_references" pass should not lead in an invalid model, but extract metadata instead. Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

onnx/optimizer#156 · Opened Mar 3, 2025
How to add customer fusion pass? Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

onnx/optimizer#149 · 1 comment · 2 reactions · Opened Feb 28, 2024
3 concatenations at the same time? Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

onnx/optimizer#146 · Opened Nov 28, 2023
Optimizer return an empty model Open

Difficulty 4/5 3-5 days Newbie friendliness 28/100

onnx/optimizer#144 · 3 comments · Opened Oct 12, 2023
Fold LpNormalization Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

onnx/optimizer#143 · 1 comment · 1 reaction · Opened Sep 13, 2023
local functions missed when optimizing a model Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

onnx/optimizer#136 · Opened Jul 31, 2023
If model use initializer, fuse_bn_into_conv is broken from v0.3.9 Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

onnx/optimizer#133 · 5 comments · 1 reaction · Opened Apr 18, 2023
CleanUnusedInitializersAndNodeArgs warning still issued after onnxoptimizer run Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

onnx/optimizer#110 · 1 comment · Opened Jan 11, 2023
Optimizer reports "Unresolved value references" since v0.3.0 Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 48/100

onnx/optimizer#104 · 2 comments · Opened Nov 13, 2022
It builds dependencies instead if reusing installed in the system. Open

Difficulty 4/5 3-5 days Newbie friendliness 20/100

onnx/optimizer#98 · 1 comment · Opened Sep 16, 2022
does this repo have some records of inference acceleration? Open

Difficulty 1/5 Under an hour Newbie friendliness 20/100

onnx/optimizer#60 · Opened Nov 18, 2021
Is there a specific document for each .h header file in onnxoptimizer / passes? Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

onnx/optimizer#57 · 1 comment · 1 reaction · Opened Oct 22, 2021
optimize passes of mean ？ Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

onnx/optimizer#56 · 1 comment · 1 reaction · Opened Oct 20, 2021
[Pass request] Fuse Pad - Pooling (Avg/MaxPool) Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

onnx/optimizer#54 · Opened Oct 4, 2021

onnx/optimizer

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