Python behind the scenes #13: the GIL and its effects on Python multithreading
As you probably know, the GIL stands for the Global Interpreter Lock, and its job is to make the CPython interpreter thread-safe. The GIL allows only one OS thread to execute Python bytecode at any given time, and the consequence of this is that it's not possible to speed up CPU-intensive Python code by distributing the work among multiple threads. This is, however, not the only negative effect of
PEP 617 – New PEG parser for CPython | peps.python.org
PEP 617 – New PEG parser for CPython Author: Guido van Rossum <guido at python.org>, Pablo Galindo <pablogsal at python.org>, Lysandros Nikolaou <lisandrosnik at gmail.com> Discussions-To: Python-Dev list Status: Final Type: Standards Track Created: 24-Mar-2020 Python-Version: 3.9 Post-History: 02-Apr-2020 Table of Contents Overview Background on LL(1) parsers Background on PEG parsers Rationale S
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ã€PyCon JP 2018】Rustã¨Pythonを使ã£ã¦ã€Pythonã®æ‹¡å¼µãƒ¢ã‚¸ãƒ¥ãƒ¼ãƒ«ã‚’書ã方法
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CPython Development
ã“ã® note ã«ã¤ã„㦠/ dict.popitem() ã®æœ€é©åŒ–ã«å¤±æ•—ã—ãŸä»¶ / function annotation ã®åŠ¹çŽ‡åŒ– / dictã®ãƒãƒ¼ãƒ‰ãƒ•ã‚¡ã‚¯ã‚¿ãƒ¼ã‚’ 1/2 ã«ã™ã‚‹ï¼Ÿ / tcmalloc / dictã®lookupã‚’dk_size特殊化ã§é«˜é€ŸåŒ– / 最上ä½bitã®æŽ¢ç´¢ / per opcode cache / PyUnicode ã‹ã‚‰ wchar_t* を消ã—ãŸã„ / Pow
CPython ã® Core Developer ã«ãªã‚Šã¾ã—㟠- methaneã®ãƒ–ãƒã‚°
Python 3.6 ã«å–ã‚Šè¾¼ã¾ã‚ŒãŸ dict ã®æ–°å®Ÿè£…ãªã©ã§ã‚³ã‚¢ã‚³ãƒŸãƒƒã‚¿ãƒ¼ã«èˆˆå‘³ã‚’æŒã£ã¦ã‚‚らã„〠Core Developer (è¦ã™ã‚‹ã«ã‚³ãƒŸãƒƒã‚¿ãƒ¼) ã«æŽ¨è–¦ã—よã†ã‹ï¼Ÿã¨ã„ã†æ案をもらã„ã¾ã—ãŸã€‚ 最åˆã¯ã‚³ãƒŸãƒƒã‚¿ãƒ¼ã¨ã‹é¢å€’ãã†ã ã—ã€ã‚³ãƒŸãƒƒãƒˆãƒ¡ãƒƒã‚»ãƒ¼ã‚¸ã¨ã‹NEWSエントリー（通常パッãƒã‚’コミットã™ã‚‹ã¨ãã«ã‚³ãƒŸãƒƒã‚¿ãƒ¼ãŒæ›¸ã）ã¨ã‹ã‚’英語ã§æ›¸ãã®ã‚‚英語ãŒå¾—æ„ãªäººãŒã‚„ã£ãŸã»ã†ãŒã„ã„ã ã‚ã†ã—ã€ã¨ã‚Šã‚ãˆãš github ã«ç§»è¡Œã™ã‚‹ã¾ã§ã¯æ§˜å見ã—ã¦ãŠã“ã†ã¨æ€ã£ã¦ãŸã®ã§ã™ãŒã€ dict 関係ã®ãƒ‘ッãƒãŒã„ãã¤ã‚‚レビュー待ã¡ã§ãªã‹ãªã‹ã‚³ãƒŸãƒƒãƒˆã•ã‚Œãªã„ã®ã‚’見ã¦ã€Œã‚„ã£ã±ã‚Šã‚¢ã‚¯ãƒ†ã‚£ãƒ–ãªã‚³ãƒŸãƒƒã‚¿ãƒ¼ãŒå…¨ç„¶è¶³ã‚Šã¦ãªã„ã€ã¨è€ƒãˆç›´ã—ã€å¿—願ã™ã‚‹ã“ã¨ã«ã€‚ ã§ã€å…ˆæœˆæœ«ã«ã‚³ãƒŸãƒƒãƒˆæ¨©ã‚’もらã£ãŸï¼ˆã¨ã„ã†ã‹ push ã§ãる権é™ã‚’æŒã£ãŸ hg アカウント㫠ssh éµã‚’登録ã—ã¦ã‚‚らã£ãŸï¼‰ã®ã§ã™ãŒã€æ–°ç±³ã‚³ãƒŸãƒƒã‚¿ãƒ¼ã¯ç°¡å˜ãªãƒ‘ッãƒã§ã‚‚ä»–ã®ã‚³ã‚¢ã‚³ãƒŸ
Python 3.6 ã®ï¼ˆå€‹äººçš„ã«ï¼‰æ³¨ç›®ã®å¤‰æ›´ç‚¹ - methaneã®ãƒ–ãƒã‚°
Python 3.6b1 ãŒãƒªãƒªãƒ¼ã‚¹ã•ã‚Œã¾ã—ãŸã。（フライング） beta1 ã¨ã„ã†ã“ã¨ã§ã€ 3.6 ã«å‘ã‘ãŸæ–°æ©Ÿèƒ½ã®è¿½åŠ 㯠(provisional package を除ã„ã¦) 終了ã§ã™ã€‚ãŸã ã—ã€ä»•æ§˜ãŒç¢ºå®šã—ãŸã¨è¨€ã†ã‚ã‘ã§ã¯ãªãã¦ã€beta版ã«å¯¾ã™ã‚‹ãƒ•ã‚£ãƒ¼ãƒ‰ãƒãƒƒã‚¯ã‚’å…ƒã«æ–°æ©Ÿèƒ½ã‚’ä¿®æ£ã—ãŸã‚Šã€æœ€æ‚ª revert ã—㦠3.7 ã«æŒã¡è¶Šã—ã«ã•ã‚Œã‚‹å¯èƒ½æ€§ã‚‚ã‚ã‚Šã¾ã™ã€‚ ãªãŠã€ 3.6b1 ãŒå‡ºã‚‹å‰ã®1週間㌠core dev sprint ãŒã‚ã‚Šã€ãã“ã§ã‚ã¡ã‚ƒãã¡ã‚ƒå¤§é‡ã«å¤§ãã‚ã®å¤‰æ›´ãŒå…¥ã‚Šã¾ã—ãŸã€‚ãªã®ã§ã€å¸¸ç”¨ç’°å¢ƒã«ã¯å…¨ãオススメã§ãã¾ã›ã‚“ãŒã€OSS開発者ã ã£ãŸã‚‰ .travis.yml ã« python: "nightly" ã‚’è¿½åŠ ã—ã¦ãƒªã‚°ãƒ¬ãƒƒã‚·ãƒ§ãƒ³ã®ç™ºè¦‹ã«è²¢çŒ®ã—ãŸã‚Šï¼ˆâ†ã“ã‚Œã‚ã£ã¡ã‚ƒæœ‰ã‚Šé›£ã„ã§ã™ï¼‰ã€ãれ以外ã®äººã‚‚ 3.6 を試ã—ã¦ã¿ã¦æ—©ã‚ã«ãƒ•ã‚£ãƒ¼ãƒ‰ãƒãƒƒã‚¯ã‚’ã—ã¦ã‚‚らãˆã‚‹ã¨ã€å¹´æœ«ã® 3.6 ãŒã‚ˆã‚Šå®Œæˆ
[Python-Dev] Python 3.6 dict becomes compact and gets a private version; and keywords become ordered
[Python-Dev] Python 3.6 dict becomes compact and gets a private version; and keywords become ordered Victor Stinner victor.stinner at gmail.com Thu Sep 8 16:22:46 EDT 2016 Previous message (by thread): [Python-Dev] PEP 468 ready for pronouncement. Next message (by thread): [Python-Dev] Python 3.6 dict becomes compact and gets a private version; and keywords become ordered Messages sorted by: [ dat
Pythonã®å†…éƒ¨æ§‹é€ ::PyObject ― CPythonã®å®Ÿè£…ã‹ã‚‰å†…部ã«è¿«ã‚‹ | POSTD
ã“ã‚“ã«ã¡ã¯ã€çš†ã•ã‚“。 Python言語ã®å®Ÿè£…ã«æ·±ãè¸ã¿è¾¼ã‚€å‰ã«ã€Pythonã®ä¸»è¦ãªæ¦‚念を知ã£ã¦ãŠãå¿…è¦ãŒã‚ã‚Šã¾ã™ã€‚ãã‚Œã¯éžå¸¸ã«ã‚·ãƒ³ãƒ—ルã§ã€ å…¨ã¦ãŒã‚ªãƒ–ジェクトã ã¨ã„ã†ã“ã¨ã§ã™ã€‚ã“ã®ã“ã¨ã¯ã€Pythonã®å†…éƒ¨æ§‹é€ ã‚’å¦ç¿’ã™ã‚‹éš›ã®æœ€åˆã®ã‚¹ãƒ†ãƒƒãƒ—ã§ã‚ã‚Šã€ã“ã®æ—…ã®å…¥ã‚Šå£ã§ã‚‚ã‚ã‚Šã¾ã™ã€‚ 今回ã®ä¸»ãªãƒ†ãƒ¼ãƒžã¯ã€Pythonã®ã‚ªãƒ–ジェクトãŒå®Ÿè£…レベルã§ã©ã®ã‚ˆã†ã«æ‰±ã‚ã‚Œã¦ã„ã‚‹ã‹ã‚’ç†è§£ã™ã‚‹ã“ã¨ã§ã™ã€‚ç§ãŸã¡ã¯ã€ Python 2.7.8 ã®CPythonã®å®Ÿè£…ã«ã¤ã„ã¦è©±ã‚’ã—ã¦ã„ãã¾ã™ã€‚ Pythonã®ã‚½ãƒ¼ã‚¹ã‚’ダウンãƒãƒ¼ãƒ‰ã—ã€è§£å‡ã™ã‚‹ã“ã¨ã‚’想定ã—ã¦ã„ã‚‹ã®ã§ã€ã‚½ãƒ¼ã‚¹ã‚³ãƒ¼ãƒ‰ã¸ã®å‚ç…§ã¯å…¨ã¦ã€ãƒ«ãƒ¼ãƒˆãƒ•ã‚©ãƒ«ãƒ€ã‹ã‚‰ã®ç›¸å¯¾çš„ãªå‚ç…§ã«ãªã‚Šã¾ã™ã€‚ PyObjectã¨PyVarObject Pythonã§ã¯å…¨ã¦ãŒã‚ªãƒ–ジェクトã§ã™ã€‚Pythonã§ä½¿ã‚ã‚Œã¦ã„る以下ã®ã‚‚ã®ã¯æ–‡å—通りã€å…¨ã¦ C ã® PyObject ã§ã™ã€‚ 関数 スライス
Philip Guo - CPython internals: A ten-hour codewalk through the Python interpreter source code
Here are nine lectures walking through the internals of CPython, the canonical Python interpreter implemented in C. They were from a dynamic programming languages course that I taught in Fall 2014 at the University of Rochester. The format isn't ideal, but I haven't seen this level of detail about CPython presented online, so I wanted to share these videos. Here are nine lectures I gave on CPython
CPython ã® GC ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚° - methaneã®ãƒ–ãƒã‚°
ISUCON 㯠Go ã§å‚戦ã—ã¦ã„ã‚‹ã‚“ã ã‘ã©ã€è¤‡æ•°ã®ãƒãƒ¼ãƒ ㌠Python ã§äºˆé¸é€šéŽã—ãŸã‚‰ã—ã„ã®ã§ã€å¿œæ´ã®ãŸã‚ã« Tips を公開ã—ã¦ã„ã“ã†ã¨æ€ã†ã€‚ 目次 CPython ã® GC ã«ã¤ã„ã¦ çµ±è¨ˆæƒ…å ±ã‚’å‡ºåŠ›ã™ã‚‹ 第一世代GCã®é–“隔を調整ã™ã‚‹ Out of Band GC 循環å‚照を見ã¤ã‘ã¦å¯¾å‡¦ã™ã‚‹ CPython ã® GC ã«ã¤ã„㦠CPython ã®GCã¯å‚照カウント＋循環å‚照コレクタã 。ãã—ã¦å‚照カウント方å¼ã¯(å¹¾ã¤ã‹ã®æ¬ 点ã¯ã‚ã‚‹ã‚‚ã®ã®)Webアプリã®ãƒœãƒˆãƒ«ãƒãƒƒã‚¯ã«ãªã£ãŸã‚Šã¯ã—ã«ãã„。 ãªã®ã§GCãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°ã®åŸºæœ¬ã¯æ¬¡ã®ã‚ˆã†ã«ãªã‚‹ã€‚ 循環å‚照をé¿ã‘ã‚‹ 循環å‚照コレクタã®å‘¼ã³å‡ºã—タイミングを制御ã™ã‚‹ 循環å‚照コレクタã¯ã€ç”Ÿãã¦ã„るオブジェクトã®æ•°ãŒã‚る程度増ãˆã‚‹ã¨ç¬¬ä¸€ä¸–代ãŒå®Ÿè¡Œã•ã‚Œã€ç¬¬ä¸€ä¸–代ãŒä¸€å®šå›žæ•°å®Ÿè¡Œã•ã‚Œã‚‹ã¨ç¬¬äºŒä¸–代ãŒã€ç¬¬äºŒä¸–代ãŒä¸€å®šå›žæ•°å®Ÿè¡Œã•ã‚Œã‚‹ã¨ç¬¬ä¸‰ä¸–代ãŒå®Ÿè¡Œã•ã‚Œã‚‹ã€‚ å„世代
View Proposal
Abstract: The idea is to provide a standard mechanism to translate Python's exception, traceback, built-in help and general messages to languages other than English, to get a fully internationalized Python implementation at least in Spanish (easily extensible to other languages and without breaking backward compatibility). This could be helpful to increase diversity (i.e for non-technical users, b
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Progress on no-GIL CPython [LWN.net]
https://devguide.python.org/gdb/
A formal specification for the (C)Python virtual machine - Python Language Summit 2020
HPy kick-off sprint report
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cpython/Lib/collections/__init__.py at 052b2dfdc967a8c061ff9561534e905009b88b8c · python/cpython
> Adding a freaking JIT to CPython is a ridiculous suggestion that will never ha... | Hacker News
Did Quora's switch to PyPy result in increased memory consumption?
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