Qiskit / qiskit / 9101517319

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github

Committed by web-flow

Commit Message

Fix unnecessary serialisation of `PassManager` in serial contexts (#12410) (#12413)

* Fix unnecessary serialisation of `PassManager` in serial contexts

This exposes the interal decision in `parallel_map` of whether to
actually run in serial or not.  If not, there's no need for
`PassManager` to side-car its `dill` serialisation onto the side of the
IPC (we use `dill` because we need to pickle lambdas), which can be an
unfortunately huge cost for certain IBM pulse-enabled backends.

* Remove new function from public API

This makes the patch series safe for backport to 1.1.

(cherry picked from commit b12e9ec3c)

Co-authored-by: Jake Lishman <jake.lishman@ibm.com>

Run Details

12 of 12 new or added lines in 3 files covered. (100.0%)

20 existing lines in 4 files now uncovered.

62251 of 69465 relevant lines covered (89.61%)

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