Issue 32043: Add a new -X dev option: "developer mode"
Created on 2017-11-16 02:43 by vstinner, last changed 2022-04-11 14:58 by admin. This issue is now closed.
| Pull Requests | |||
|---|---|---|---|
| URL | Status | Linked | Edit |
| PR 4413 | merged | vstinner, 2017-11-16 02:47 | |
| PR 4478 | merged | vstinner, 2017-11-20 17:33 | |
| Messages (7) | |||
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| msg306330 - (view) | Author: STINNER Victor (vstinner) *  |
Date: 2017-11-16 02:43 | |
I propose to add a new "developer mode": a new "-X dev" command line option. In short: python3 -X dev script.py behaves as: PYTHONMALLOC=debug python3 -W default -X faulthandler script.py For the rationale, please see: https://mail.python.org/pipermail/python-dev/2017-November/150514.html |
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| msg306331 - (view) | Author: STINNER Victor (vstinner) * |
Date: 2017-11-16 02:48 | |
I rewrote Py_Main() in bpo-32030 to make it very easy to implement this new feature. I wrote PR 4413 to implement -X dev. |
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| msg306351 - (view) | Author: STINNER Victor (vstinner) * |
Date: 2017-11-16 11:20 | |
New changeset ccb0442a338066bf40fe417455e5a374e5238afb by Victor Stinner in branch 'master': bpo-32043: New "developer mode": "-X dev" option (#4413) https://github.com/python/cpython/commit/ccb0442a338066bf40fe417455e5a374e5238afb |
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| msg306357 - (view) | Author: STINNER Victor (vstinner) * |
Date: 2017-11-16 13:04 | |
Antoine Pitrou asked me to document the performance and memory overhead of -X dev: https://mail.python.org/pipermail/python-dev/2017-November/150578.html For example, I measured an increase of +50% on the peak memory usage (measured by tracemalloc) when running test_os. Antoine proposed: """Currently, developer mode adds negligible CPU time overhead, but can increase memory consumption significantly if many small objects are allocated. This is subject to change in the future.""" https://mail.python.org/pipermail/python-dev/2017-November/150579.html |
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| msg306619 - (view) | Author: STINNER Victor (vstinner) * |
Date: 2017-11-21 02:59 | |
I created bpo-32101: Add PYTHONDEVMODE=1 to enable the developer mode. |
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| msg306620 - (view) | Author: STINNER Victor (vstinner) * |
Date: 2017-11-21 02:59 | |
New changeset bc9b6e29cb52f8da15613f9174af2f603131b56d by Victor Stinner in branch 'master': bpo-32043: Rephrase -X dev documentation (#4478) https://github.com/python/cpython/commit/bc9b6e29cb52f8da15613f9174af2f603131b56d |
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| msg306621 - (view) | Author: STINNER Victor (vstinner) * |
Date: 2017-11-21 03:03 | |
While the discussion is not done, I close this issue to focus on other more specific issues. I completed the documentation and fixed warnings filters (bpo-32089). The option now also enables asyncio debug mode (bpo-32047). It was proposed to add an environment variable to enable the developer mode: see bpo-32101 ("Add PYTHONDEVMODE=1 to enable the developer mode"). Note: I also fixed subprocess._args_from_interpreter_flags: bpo-32094. |
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2022-04-11 14:58:54 | admin | set | github: 76224 |
| 2017-11-21 03:03:29 | vstinner | set | status: open -> closed resolution: fixed messages: + msg306621 stage: patch review -> resolved |
| 2017-11-21 02:59:52 | vstinner | set | messages: + msg306620 |
| 2017-11-21 02:59:27 | vstinner | set | messages: + msg306619 |
| 2017-11-20 17:33:28 | vstinner | set | pull_requests: + pull_request4415 |
| 2017-11-16 13:04:17 | vstinner | set | messages: + msg306357 |
| 2017-11-16 11:20:33 | vstinner | set | messages: + msg306351 |
| 2017-11-16 02:48:51 | vstinner | set | messages: + msg306331 |
| 2017-11-16 02:47:58 | vstinner | set | keywords:
+ patch stage: patch review pull_requests: + pull_request4363 |
| 2017-11-16 02:47:55 | barry | set | nosy:
+ barry |
| 2017-11-16 02:43:27 | vstinner | create | |