{"id":4508,"date":"2023-08-01T11:35:37","date_gmt":"2023-08-01T11:35:37","guid":{"rendered":"https:\/\/picockpit.com\/raspberry-pi\/?p=4508"},"modified":"2023-08-01T11:35:39","modified_gmt":"2023-08-01T11:35:39","slug":"python-dispatch-making-the-gil-optional","status":"publish","type":"post","link":"https:\/\/picockpit.com\/raspberry-pi\/nl\/python-dispatch-maakt-de-gil-optimaal\/","title":{"rendered":"Python Verzending: De GIL optioneel maken"},"content":{"rendered":"<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/picockpit.com\/raspberry-pi\/wp-content\/uploads\/2023\/08\/Python-Dispatch-1024x576.png\" alt=\"\" class=\"wp-image-4511\" srcset=\"https:\/\/picockpit.com\/raspberry-pi\/wp-content\/uploads\/2023\/08\/Python-Dispatch-1024x576.png 1024w, https:\/\/picockpit.com\/raspberry-pi\/wp-content\/uploads\/2023\/08\/Python-Dispatch-300x169.png 300w, https:\/\/picockpit.com\/raspberry-pi\/wp-content\/uploads\/2023\/08\/Python-Dispatch-768x432.png 768w, https:\/\/picockpit.com\/raspberry-pi\/wp-content\/uploads\/2023\/08\/Python-Dispatch-18x10.png 18w, https:\/\/picockpit.com\/raspberry-pi\/wp-content\/uploads\/2023\/08\/Python-Dispatch.png 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>De stuurgroep heeft<a href=\"https:\/\/discuss.python.org\/t\/a-steering-council-notice-about-pep-703-making-the-global-interpreter-lock-optional-in-cpython\/30474\"> een grote aankondiging over de toekomst van Python<\/a>. Ze hebben namelijk besloten om de Global Interpreter Lock (GIL) optioneel te maken in CPython en uiteindelijk de GIL helemaal te verwijderen.<\/p>\n\n\n\n<p>Dit is een enorme beslissing die Python fundamenteel zal veranderen.<\/p>\n\n\n\n<p>Daarom zal ik in dit bericht uitleggen wat de GIL is, wat de voor- en nadelen zijn en wat de toekomst brengt.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">De GIL<\/h2>\n\n\n\n<p>Laat me de Global Interpreter Lock \u00e9\u00e9n woord per keer doorlopen in omgekeerde volgorde, te beginnen met <em>slot<\/em> en dan <em>tolk<\/em> en tot slot, <em>wereldwijd<\/em>.<\/p>\n\n\n\n<p>Een lock is een mechanisme dat slechts \u00e9\u00e9n thread tegelijk laat draaien. Dus als een thread het slot in handen krijgt, krijgt het exclusieve toegang tot de Python-interpreter.<\/p>\n\n\n\n<p>Een <a href=\"https:\/\/picockpit.com\/raspberry-pi\/whats-the-difference-between-micropython-circuitpython-cpython-anyway\/\">interpreter is het programma voor het uitvoeren van Python-code<\/a>.<\/p>\n\n\n\n<p>Het woord \"globaal\" verwijst hier naar de reikwijdte van het interpreter lock. Omdat het interpreter lock globaal is, garandeert het dat slechts \u00e9\u00e9n thread tegelijk Python code uitvoert binnen \u00e9\u00e9n proces.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/picockpit.com\/raspberry-pi\/wp-content\/uploads\/2023\/08\/image-1.png\" alt=\"\" class=\"wp-image-4520\" width=\"451\" height=\"345\" srcset=\"https:\/\/picockpit.com\/raspberry-pi\/wp-content\/uploads\/2023\/08\/image-1.png 645w, https:\/\/picockpit.com\/raspberry-pi\/wp-content\/uploads\/2023\/08\/image-1-300x229.png 300w, https:\/\/picockpit.com\/raspberry-pi\/wp-content\/uploads\/2023\/08\/image-1-16x12.png 16w\" sizes=\"auto, (max-width: 451px) 100vw, 451px\" \/><figcaption class=\"wp-element-caption\">Krediet: <a href=\"https:\/\/statusneo.com\/concurrency-in-python-threading-processes-and-asyncio\/\">StatusNeo<\/a>.<\/figcaption><\/figure>\n<\/div>\n\n\n<p>De GIL is dus een mechanisme dat voorkomt dat meerdere threads tegelijkertijd door de interpreter lopen. Maar waarom zou je dat willen?<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Voordelen<\/h2>\n\n\n\n<p>Het belangrijkste voordeel van de GIL is dat het dingen makkelijker maakt. Het beheren van geheugen is eenvoudiger, het beheren van threads is dus eenvoudiger en het maken van modules is dus eenvoudiger.<\/p>\n\n\n\n<p>Zonder de GIL kun je snel in de problemen komen met multithreading. Als je niet de juiste lokale sloten instelt voor elke thread, kan Python crashen of ander geheugen in de computer beschadigen.<\/p>\n\n\n\n<p>En als je niet multithreading, dan is de GIL super handig, omdat het alles soepel laat lopen.<\/p>\n\n\n\n<p>De GIL houdt de zaken dus eenvoudig en veilig.<\/p>\n\n\n\n<p>Waarom zou je dat dan niet willen?<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Nadelen<\/h2>\n\n\n\n<p>De afweging hier is gemak voor snelheid.<\/p>\n\n\n\n<p>Door multithreading te voorkomen, maakt de GIL CPython langzamer en minder performant dan sommige andere talen (zoals C++, Go en Rust).<\/p>\n\n\n\n<p>Vooral met de explosie van AI in de afgelopen maanden wordt de GIL steeds meer een probleem om programma's snel en effici\u00ebnt uit te voeren.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" hcb-fetch-image-from=\"https:\/\/www.youtube.com\/watch?v=9OOJcTp8dqE\" title=\"Keynote: Multithreaded Python zonder de GIL - gepresenteerd door Sam Gross\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/9OOJcTp8dqE?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">De toekomst van de GIL<\/h2>\n\n\n\n<p>Dus nu de stuurgroep heeft aangekondigd dat ze de <a href=\"https:\/\/peps.python.org\/pep-0703\/#alternatives\">Python Verbeteringsvoorstel (PEP) 703, geschreven door Sam Gross<\/a>We begeven ons op onbekend terrein.<\/p>\n\n\n\n<p>Ontelbare uitbreidingen zijn geschreven met de GIL in het achterhoofd. Alle standaarden in CPython zijn afhankelijk van de GIL. Iedereen bouwt in CPython met de GIL in het middelpunt van hun programma's (al dan niet opzettelijk).<\/p>\n\n\n\n<p>Daarom maakt de stuurgroep de GIL in eerste instantie optioneel, maar op de lange termijn willen ze de GIL volledig afschaffen. <\/p>\n\n\n\n<p>Zoals ze het in het bericht zeggen: \"We willen geen permanente scheiding cre\u00ebren tussen builds (en uitbreidingsmodules) met en zonder GIL.\"<\/p>\n\n\n\n<p>Dit zal Python absoluut transformeren en, misschien wel het interessantst, op manieren die nog niemand weet. Brett Cannon, <a href=\"https:\/\/discuss.python.org\/t\/poll-feedback-to-the-sc-on-making-cpython-free-threaded-and-pep-703\/28540\">in een enqu\u00eate aan het kernteam van ontwikkelaars<\/a>schreef dat \"Python free-threaded maken... veel onbekenden heeft. We weten niet hoeveel code impliciet vertrouwt op de GIL, of thread-onveilig is op subtiele manieren die gemaskeerd worden door de GIL.\"<\/p>\n\n\n\n<p>De GIL verdwijnt - wat neemt hij mee?<\/p>\n\n\n\n<p>En, nog belangrijker, hoe zal het nieuwe CPython eruit zien?<\/p>\n<div class=\"shariff shariff-align-center shariff-widget-align-left shariff-buttonstretch\"><ul class=\"shariff-buttons theme-white orientation-horizontal buttonsize-medium\"><li class=\"shariff-button twitter shariff-nocustomcolor\" style=\"background-color:#595959\"><a href=\"https:\/\/twitter.com\/share?url=https%3A%2F%2Fpicockpit.com%2Fraspberry-pi%2Fnl%2Fpython-dispatch-maakt-de-gil-optimaal%2F&text=Python%20Dispatch%3A%20Making%20the%20GIL%20Optional\" title=\"Delen op X\" aria-label=\"Delen op X\" role=\"button\" rel=\"noopener nofollow\" class=\"shariff-link\" style=\"; background-color:#000; color:#000\" target=\"_blank\"><span class=\"shariff-icon\" style=\"fill:#000\"><svg width=\"32px\" height=\"20px\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 24 24\"><path fill=\"#000\" d=\"M14.258 10.152L23.176 0h-2.113l-7.747 8.813L7.133 0H0l9.352 13.328L0 23.973h2.113l8.176-9.309 6.531 9.309h7.133zm-2.895 3.293l-.949-1.328L2.875 1.56h3.246l6.086 8.523.945 1.328 7.91 11.078h-3.246zm0 0\"\/><\/svg><\/span><span class=\"shariff-text\" style=\"color:#000\">delen<\/span>&nbsp;<\/a><\/li><li class=\"shariff-button facebook shariff-nocustomcolor\" style=\"background-color:#4273c8\"><a href=\"https:\/\/www.facebook.com\/sharer\/sharer.php?u=https%3A%2F%2Fpicockpit.com%2Fraspberry-pi%2Fnl%2Fpython-dispatch-maakt-de-gil-optimaal%2F\" title=\"Delen op Facebook\" aria-label=\"Delen op Facebook\" role=\"button\" rel=\"nofollow\" class=\"shariff-link\" style=\"; background-color:#3b5998; color:#3b5998\" target=\"_blank\"><span class=\"shariff-icon\" style=\"fill:#3b5998\"><svg width=\"32px\" height=\"20px\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 18 32\"><path fill=\"#3b5998\" d=\"M17.1 0.2v4.7h-2.8q-1.5 0-2.1 0.6t-0.5 1.9v3.4h5.2l-0.7 5.3h-4.5v13.6h-5.5v-13.6h-4.5v-5.3h4.5v-3.9q0-3.3 1.9-5.2t5-1.8q2.6 0 4.1 0.2z\"\/><\/svg><\/span><span class=\"shariff-text\" style=\"color:#3b5998\">delen<\/span>&nbsp;<\/a><\/li><li class=\"shariff-button telegram shariff-nocustomcolor\" style=\"background-color:#4084A6\"><a href=\"https:\/\/telegram.me\/share\/url?url=https%3A%2F%2Fpicockpit.com%2Fraspberry-pi%2Fnl%2Fpython-dispatch-maakt-de-gil-optimaal%2F&text=Python%20Dispatch%3A%20Making%20the%20GIL%20Optional\" title=\"Delen op Telegram\" aria-label=\"Delen op Telegram\" role=\"button\" rel=\"noopener nofollow\" class=\"shariff-link\" style=\"; background-color:#0088cc; color:#0088cc\" target=\"_blank\"><span class=\"shariff-icon\" style=\"fill:#0088cc\"><svg width=\"32px\" height=\"20px\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 32 32\"><path fill=\"#0088cc\" d=\"M30.8 6.5l-4.5 21.4c-.3 1.5-1.2 1.9-2.5 1.2L16.9 24l-3.3 3.2c-.4.4-.7.7-1.4.7l.5-7L25.5 9.2c.6-.5-.1-.8-.9-.3l-15.8 10L2 16.7c-1.5-.5-1.5-1.5.3-2.2L28.9 4.3c1.3-.5 2.3.3 1.9 2.2z\"\/><\/svg><\/span><span class=\"shariff-text\" style=\"color:#0088cc\">delen<\/span>&nbsp;<\/a><\/li><li class=\"shariff-button reddit shariff-nocustomcolor\" style=\"background-color:#ff5700\"><a href=\"https:\/\/www.reddit.com\/submit?url=https%3A%2F%2Fpicockpit.com%2Fraspberry-pi%2Fnl%2Fpython-dispatch-maakt-de-gil-optimaal%2F\" title=\"Delen op Reddit\" aria-label=\"Delen op Reddit\" role=\"button\" rel=\"noopener nofollow\" class=\"shariff-link\" style=\"; background-color:#ff4500; color:#ff4500\" target=\"_blank\"><span class=\"shariff-icon\" style=\"fill:#ff4500\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 512 512\"><path fill=\"#ff4500\" d=\"M440.3 203.5c-15 0-28.2 6.2-37.9 15.9-35.7-24.7-83.8-40.6-137.1-42.3L293 52.3l88.2 19.8c0 21.6 17.6 39.2 39.2 39.2 22 0 39.7-18.1 39.7-39.7s-17.6-39.7-39.7-39.7c-15.4 0-28.7 9.3-35.3 22l-97.4-21.6c-4.9-1.3-9.7 2.2-11 7.1L246.3 177c-52.9 2.2-100.5 18.1-136.3 42.8-9.7-10.1-23.4-16.3-38.4-16.3-55.6 0-73.8 74.6-22.9 100.1-1.8 7.9-2.6 16.3-2.6 24.7 0 83.8 94.4 151.7 210.3 151.7 116.4 0 210.8-67.9 210.8-151.7 0-8.4-.9-17.2-3.1-25.1 49.9-25.6 31.5-99.7-23.8-99.7zM129.4 308.9c0-22 17.6-39.7 39.7-39.7 21.6 0 39.2 17.6 39.2 39.7 0 21.6-17.6 39.2-39.2 39.2-22 .1-39.7-17.6-39.7-39.2zm214.3 93.5c-36.4 36.4-139.1 36.4-175.5 0-4-3.5-4-9.7 0-13.7 3.5-3.5 9.7-3.5 13.2 0 27.8 28.5 120 29 149 0 3.5-3.5 9.7-3.5 13.2 0 4.1 4 4.1 10.2.1 13.7zm-.8-54.2c-21.6 0-39.2-17.6-39.2-39.2 0-22 17.6-39.7 39.2-39.7 22 0 39.7 17.6 39.7 39.7-.1 21.5-17.7 39.2-39.7 39.2z\"\/><\/svg><\/span><span class=\"shariff-text\" style=\"color:#ff4500\">delen<\/span>&nbsp;<\/a><\/li><\/ul><\/div>","protected":false},"excerpt":{"rendered":"<p>De Steering Council heeft een grote aankondiging gedaan over de toekomst van Python. Ze hebben namelijk besloten om de Global Interpreter Lock (GIL) optioneel te maken in CPython en uiteindelijk de GIL helemaal te verwijderen. Dit is een enorme beslissing die Python fundamenteel zal veranderen. Daarom zal ik in deze post doornemen wat de GIL is, zijn...<\/p>","protected":false},"author":2,"featured_media":4511,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1193,1721],"tags":[1726,1727,477,1731,1732,996,1729,1722,14,1723,1728,1725,476,1730,1724],"class_list":["post-4508","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-python","category-python-dispatch","tag-async","tag-asynchronous-programming","tag-circuitpython","tag-concurrency","tag-concurrent-programming","tag-cpython","tag-gil","tag-global-interpreter-lock","tag-micropython","tag-multithreading","tag-parallel-programming","tag-parallelism","tag-python","tag-python-dispatch","tag-single-threading"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Python Dispatch: Making the GIL Optional | 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