add mmcv.jit

[lml131]

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[hellock]

Task linked: CU-5brfzp MMDet support JIT decorator

[codecov]

Codecov Report

Merging #4192 (8d94332) into master (3620bb7) will decrease coverage by 0.09%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #4192      +/-   ##
==========================================
- Coverage   63.76%   63.66%   -0.10%     
==========================================
  Files         252      252              
  Lines       19244    19287      +43     
  Branches     3246     3246              
==========================================
+ Hits        12271    12280       +9     
- Misses       6344     6381      +37     
+ Partials      629      626       -3     

Flag	Coverage Δ
unittests	63.64% <100.00%> (-0.09%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
mmdet/core/bbox/coder/bucketing_bbox_coder.py	63.76% <100.00%> (+1.08%)	⬆️
mmdet/core/bbox/coder/delta_xywh_bbox_coder.py	100.00% <100.00%> (ø)
...et/core/bbox/coder/legacy_delta_xywh_bbox_coder.py	23.28% <100.00%> (+3.28%)	⬆️
mmdet/core/bbox/coder/tblr_bbox_coder.py	25.39% <100.00%> (+3.73%)	⬆️
mmdet/core/bbox/coder/yolo_bbox_coder.py	60.97% <100.00%> (+3.08%)	⬆️
mmdet/models/losses/accuracy.py	100.00% <100.00%> (ø)
mmdet/models/losses/ae_loss.py	100.00% <100.00%> (ø)
mmdet/models/losses/balanced_l1_loss.py	65.51% <100.00%> (+2.55%)	⬆️
mmdet/models/losses/gaussian_focal_loss.py	100.00% <100.00%> (ø)
mmdet/models/losses/gfocal_loss.py	49.12% <100.00%> (+2.82%)	⬆️
... and 8 more

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