Created on 2021-01-04 17:42 by Austin-Lamb, last changed 2021-01-08 23:27 by terry.reedy.
| Pull Requests | |||
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| URL | Status | Linked | Edit |
| PR 24098 | open | Austin-Lamb, 2021-01-04 17:59 | |
| Messages (2) | |||
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| msg384333 - (view) | Author: Austin Lamb (Austin-Lamb) * | Date: 2021-01-04 17:42 | |
I noticed that CPython and the various libraries built out of the repo aren't using the "/OPT:REF" linker optimization on Windows. This optimization allows the linker to throw away dead/unreachable code, resulting in a substantial decrease in binary size. That in turn also reduces the amount of Disk I/O that must be done to get these binaries in memory (which can be meaningful on spinning hard drives that are still rather common), and the reference set of applications using Python. I'll send a PR for this shortly, just filing the issue to be able to reference it in the PR. |
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| msg384695 - (view) | Author: Terry J. Reedy (terry.reedy) *  |
Date: 2021-01-08 23:27 | |
The PR says that this deletes "uncalled code". I imagine that this is safe for a .exe. But for a .dll? As i understand it, one can, from python code, access any function via ctypes, so it seems to me that there is no way for the linker to know which callable functions in a .dll can be safely deleted. Am I missing something? |
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2021-01-08 23:27:30 | terry.reedy | set | nosy:
+ terry.reedy messages: + msg384695 |
| 2021-01-06 06:29:26 | ammar2 | set | nosy:
+ eryksun title: Optimization opportunity on Windows -> Build libraries with "/OPT:REF" linker optimization on Windows |
| 2021-01-04 17:59:34 | Austin-Lamb | set | keywords:
+ patch stage: patch review pull_requests: + pull_request22928 |
| 2021-01-04 17:42:40 | Austin-Lamb | create | |