mirror of https://github.com/Qiskit/qiskit.git
11 lines
570 B
YAML
11 lines
570 B
YAML
---
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upgrade_transpiler:
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- |
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The preset :class:`.StagedPassManager` returned for optimization level 2 by
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:func:`.generate_preset_pass_manager` and :func:`.level_2_pass_manager` have
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been reworked to provide a better balance between runtime and optimization.
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This means the output circuits will change compared to earlier releases. If
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you need an exact pass manager from level 2 in earlier releases you can
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either build it manually or use it from an earlier release and save the
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circuits with :mod:`~qiskit.qpy` to load with a newer release.
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