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Title: bpo-44590: Lazily allocate frame objects by markshannon · Pull Request #27077 · python/cpython · GitHub

Open Graph Title: bpo-44590: Lazily allocate frame objects by markshannon · Pull Request #27077 · python/cpython

X Title: bpo-44590: Lazily allocate frame objects by markshannon · Pull Request #27077 · python/cpython

Description: This PR: Moves all essential frame data to the (per-thread) stack Lazily allocates heap frame objects only when needed. For most calls to Python functions, we can get the necessary memory for a s...

Open Graph Description: This PR: Moves all essential frame data to the (per-thread) stack Lazily allocates heap frame objects only when needed. For most calls to Python functions, we can get the necessary memory for a s...

X Description: This PR: Moves all essential frame data to the (per-thread) stack Lazily allocates heap frame objects only when needed. For most calls to Python functions, we can get the necessary memory for a s...

Opengraph URL: https://github.com/python/cpython/pull/27077

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bpo-44590: Lazily allocate frame objects https://github.com/python/cpython/pull/27077#top
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Jul 9, 2021https://github.com/python/cpython/pull/27077#issue-940680167
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maximum speedup of 31% with a mean of 7%https://gist.github.com/markshannon/7de474b1607a2a99a1c3daf184d7d4dc
https://bugs.python.org/issue44590https://bugs.python.org/issue44590
Please reload this pagehttps://github.com/python/cpython/pull/27077
markshannonhttps://github.com/markshannon
June 21, 2021 18:50https://github.com/python/cpython/pull/27077#commits-pushed-79aeaf6
https://github.com/markshannon
Turn specials array into struct and add 'lasti' to it.https://github.com/python/cpython/pull/27077/commits/79aeaf6b33d719398960065b54cdd1582169abec
79aeaf6https://github.com/python/cpython/pull/27077/commits/79aeaf6b33d719398960065b54cdd1582169abec
https://github.com/markshannon
Move stack-depth from frame object to specials struct.https://github.com/python/cpython/pull/27077/commits/3b6a4e8b91f97b96316e5cd76ab5a9bcde4fc557
3b6a4e8https://github.com/python/cpython/pull/27077/commits/3b6a4e8b91f97b96316e5cd76ab5a9bcde4fc557
https://github.com/markshannon
Rename 'specials' to 'frame' as it now includes most of the data for …https://github.com/python/cpython/pull/27077/commits/6f0ba40eef60cb267af485acc60c54be6855cf28
6f0ba40https://github.com/python/cpython/pull/27077/commits/6f0ba40eef60cb267af485acc60c54be6855cf28
https://github.com/markshannon
Refactor, pushing PyFrame upward toward _PyEval_Vector.https://github.com/python/cpython/pull/27077/commits/8543c27d0889d83bdc4980eea3182913f0e2bc7b
8543c27https://github.com/python/cpython/pull/27077/commits/8543c27d0889d83bdc4980eea3182913f0e2bc7b
https://github.com/markshannon
Add pointer from stack frame to frame object and rename tstate.frame …https://github.com/python/cpython/pull/27077/commits/423d403ae2f50b1381b8e0ea580f58534fa47e39
423d403https://github.com/python/cpython/pull/27077/commits/423d403ae2f50b1381b8e0ea580f58534fa47e39
https://github.com/markshannon
More refactoring. Add tstate.frame for the top stack frame.https://github.com/python/cpython/pull/27077/commits/7bf6c30f5c6ad41f9c18e95aad40cb160f7d6796
7bf6c30https://github.com/python/cpython/pull/27077/commits/7bf6c30f5c6ad41f9c18e95aad40cb160f7d6796
https://github.com/markshannon
Convert use of PyFrameObject to _PyFrame.https://github.com/python/cpython/pull/27077/commits/861a8d9c047541bfe958d728767ac7c6c2c01646
861a8d9https://github.com/python/cpython/pull/27077/commits/861a8d9c047541bfe958d728767ac7c6c2c01646
https://github.com/markshannon
Replace most remaining uses frame object in the interpreter with stac…https://github.com/python/cpython/pull/27077/commits/35e793c883a8e4d826e2b64b165c5495f2c823ba
35e793chttps://github.com/python/cpython/pull/27077/commits/35e793c883a8e4d826e2b64b165c5495f2c823ba
https://github.com/markshannon
Convert more uses of frameobject to frame.https://github.com/python/cpython/pull/27077/commits/192094ef81fcbd0ad849fecdc9663b644bef2723
192094ehttps://github.com/python/cpython/pull/27077/commits/192094ef81fcbd0ad849fecdc9663b644bef2723
https://github.com/markshannon
Move f_state from frame object to frame.https://github.com/python/cpython/pull/27077/commits/3f601a7691acbba1e8a40a1eb9d41935dae38027
3f601a7https://github.com/python/cpython/pull/27077/commits/3f601a7691acbba1e8a40a1eb9d41935dae38027
https://github.com/markshannon
Compute f_back when on thread stack, only filling in value when frame…https://github.com/python/cpython/pull/27077/commits/bd95c3297b5017ef3ee2d7072a0588af05de8a16
bd95c32https://github.com/python/cpython/pull/27077/commits/bd95c3297b5017ef3ee2d7072a0588af05de8a16
https://github.com/markshannon
Add NULL checkhttps://github.com/python/cpython/pull/27077/commits/9961abc2d27c2ccc522fecb8f7e7522766319881
9961abchttps://github.com/python/cpython/pull/27077/commits/9961abc2d27c2ccc522fecb8f7e7522766319881
https://github.com/markshannon
Get lazy f_back working (it still leaks).https://github.com/python/cpython/pull/27077/commits/32af707ce40bacd68e0c62a7e02b88c19d77f36f
32af707https://github.com/python/cpython/pull/27077/commits/32af707ce40bacd68e0c62a7e02b88c19d77f36f
https://github.com/markshannon
Use frames not frameobjects in sys._getframe()https://github.com/python/cpython/pull/27077/commits/ac7dbe8c9761d83b8da0e5ebea92a15c7e25716d
ac7dbe8https://github.com/python/cpython/pull/27077/commits/ac7dbe8c9761d83b8da0e5ebea92a15c7e25716d
https://github.com/markshannon
NULL out frame->previous when leaving frame.https://github.com/python/cpython/pull/27077/commits/f33d2915d446b44a28e87bfc22b7f4995cadfc5a
f33d291https://github.com/python/cpython/pull/27077/commits/f33d2915d446b44a28e87bfc22b7f4995cadfc5a
https://github.com/markshannon
Frames now include nlocalspuls, so they have valid layout after code …https://github.com/python/cpython/pull/27077/commits/5c23a368b406f0628988b6f14edca29e255543f6
5c23a36https://github.com/python/cpython/pull/27077/commits/5c23a368b406f0628988b6f14edca29e255543f6
https://github.com/markshannon
Move ownership of frame in generator from frame object ot generator o…https://github.com/python/cpython/pull/27077/commits/910e991e9f8d3a2735ab07235c0ab8fbb34d9f97
910e991https://github.com/python/cpython/pull/27077/commits/910e991e9f8d3a2735ab07235c0ab8fbb34d9f97
https://github.com/markshannon
Remove localsptr field from frame object.https://github.com/python/cpython/pull/27077/commits/22e1c9b9673b60ccb2080f9824f0e78b6a2f771e
22e1c9bhttps://github.com/python/cpython/pull/27077/commits/22e1c9b9673b60ccb2080f9824f0e78b6a2f771e
https://github.com/markshannon
Add new _PyEval_EvalNoFrame function for evaluating frames directly.https://github.com/python/cpython/pull/27077/commits/f84a3f05c660f764363f84ce01e0a577057b81bf
f84a3f0https://github.com/python/cpython/pull/27077/commits/f84a3f05c660f764363f84ce01e0a577057b81bf
https://github.com/markshannon
Allow for lazily created frames.https://github.com/python/cpython/pull/27077/commits/1180a44282888cd8c2b9801000da32e412a7fafa
1180a44https://github.com/python/cpython/pull/27077/commits/1180a44282888cd8c2b9801000da32e412a7fafa
https://github.com/markshannon
Do not create frame objects for Python calls.https://github.com/python/cpython/pull/27077/commits/c76de89f1bb26fc334d5b6b31d0c2b06b8aa4bba
c76de89https://github.com/python/cpython/pull/27077/commits/c76de89f1bb26fc334d5b6b31d0c2b06b8aa4bba
https://github.com/markshannon
Don't create frame objects for generators.https://github.com/python/cpython/pull/27077/commits/15aeef1603c152f23aa6d8a99b3e75981bde65e7
15aeef1https://github.com/python/cpython/pull/27077/commits/15aeef1603c152f23aa6d8a99b3e75981bde65e7
https://github.com/markshannon
Fix memory leakhttps://github.com/python/cpython/pull/27077/commits/1d2e1ce2b086f87f7c0666959737758c1c0b68d3
1d2e1cehttps://github.com/python/cpython/pull/27077/commits/1d2e1ce2b086f87f7c0666959737758c1c0b68d3
https://github.com/markshannon
Merge branch 'main' into lazy-frame-updatedhttps://github.com/python/cpython/pull/27077/commits/1b19f8bf6fc3ceb5af027ba1649fe3d05d043ef5
1b19f8bhttps://github.com/python/cpython/pull/27077/commits/1b19f8bf6fc3ceb5af027ba1649fe3d05d043ef5
https://github.com/markshannon
Restore support for PEP 523.https://github.com/python/cpython/pull/27077/commits/d619baeae1c8fe4e9f3c9d246213406cf4c0564d
d619baehttps://github.com/python/cpython/pull/27077/commits/d619baeae1c8fe4e9f3c9d246213406cf4c0564d
https://github.com/markshannon
Streamline pushing and popping stack frames a bit.https://github.com/python/cpython/pull/27077/commits/d147d033c057617d136f9cd3b646112bc255cff8
d147d03https://github.com/python/cpython/pull/27077/commits/d147d033c057617d136f9cd3b646112bc255cff8
https://github.com/markshannon
Merge branch 'main' into lazy-framehttps://github.com/python/cpython/pull/27077/commits/25c6a716856ad0533f66b4b4e7d666c35e9f0d75
25c6a71https://github.com/python/cpython/pull/27077/commits/25c6a716856ad0533f66b4b4e7d666c35e9f0d75
https://github.com/markshannon
Add f_ prefix back to several frame fields to ease porting C code tha…https://github.com/python/cpython/pull/27077/commits/618b094c607ef442605d28c98d8ca3c006f8b5cc
618b094https://github.com/python/cpython/pull/27077/commits/618b094c607ef442605d28c98d8ca3c006f8b5cc
https://github.com/markshannon
Add NEWShttps://github.com/python/cpython/pull/27077/commits/e5da338085a75f2b436eb62d4938938b0cc35e40
e5da338https://github.com/python/cpython/pull/27077/commits/e5da338085a75f2b436eb62d4938938b0cc35e40
https://github.com/markshannon
Remove debugging artifact.https://github.com/python/cpython/pull/27077/commits/dda0b0cf30c1233bd62404277a5391d8113e0ba0
dda0b0chttps://github.com/python/cpython/pull/27077/commits/dda0b0cf30c1233bd62404277a5391d8113e0ba0
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