mirror of https://github.com/Qiskit/qiskit.git
16 lines
1.1 KiB
YAML
16 lines
1.1 KiB
YAML
---
|
|
upgrade:
|
|
- |
|
|
The dependency on `psutil <https://pypi.org/project/psutil/>`__ has been removed. The
|
|
psutil library was previously only used for detecting the number of physical CPUs and
|
|
total system memory, however this information provided does not add sufficient value
|
|
to justify the additional dependencies and overhead so it has been removed. This does
|
|
mean that the default number of processes used by :func:`.parallel_map` and functions that
|
|
internally can use :func:`.parallel_map` such as :func:`.transpile` and :meth:`.PassManager.run`
|
|
may use more or less parallel processes than in previous releases. If you'd like to adjust the
|
|
number of processes used you can use the new ``num_processes`` argument to those functions, or
|
|
the ``QISKIT_NUM_PROCS`` environment variable or ``num_processes`` field in a user configuration
|
|
file (see the `local configuration guide
|
|
<https://docs.quantum.ibm.com/guides/configure-qiskit-local>`__
|
|
for more details) if you need to adjust the number of processes that Qiskit potentially uses.
|