Revert "Added VF2PostLayout at the end of optimization stage for level 3 (#14120)" #14905
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…l 3 (Qiskit#14120)" This temporarily reverts commit a8d2366 due to multiple bugs found around the implementation see Qiskit#14867 and Qiskit#14869. Sincefixing the bugs will have a large impact on the transpilation results it is better to just disable it and save the runtime overhead which has been reported in a few places (see Qiskit#14855 and the end of the discussion in Qiskit#14653). This functionality will be fixed in 2.2.0 and re-enabled there, but for the rest of the 2.1.x release series we should just leave it disabled.
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jakelishman
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Aug 14, 2025
releasenotes/notes/disable-vf2post-level3-9c2daa70556ddf1f.yaml
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Co-authored-by: Jake Lishman <jake@binhbar.com>
jakelishman
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Aug 14, 2025
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Summary
This temporarily reverts commit a8d2366 due to multiple bugs found around the implementation see #14867 and #14869. Since fixing the bugs will have a large impact on the transpilation results it is better to just disable it and save the runtime overhead which has been reported in a few places (see #14855 and the end of the discussion in #14653). This functionality will be fixed in 2.2.0 and re-enabled there, but for the rest of the 2.1.x release series we should just leave it disabled.
Details and comments
This PR is against stable/2.1 while on main this will be fixed instead of reverted with #14869 but that isn't suitable for backport. So this PR only applies against stable/2.1