TGINSIGHT SIMILAR POSTS
Изворен канал @pythonotes · Post #32 · 7 фев.
Скорее всего уже слышали, что складывать строки через + это плохая практика. Падение производительности, и всё такое. Без лишних слов, давайте измерять: from timeit import timeit def t1(): # складываем 10 строк через + из переменной t = 'text' for _ in range(1000): s = t + t + t + t + t + t + t + t + t def t2(): # склеиваем список строк через метод join arr = ['text'] * 10 for _ in range(1000): s = ''.join(arr) def t3(): # складываем через + но не из переменной а непосредственно инлайн объекты for _ in range(1000): s = 'text' + 'text' + 'text' + ... # всего 10 раз Теперь каждую строку склейки запустим по 10М раз >>> timeit(t1, number=10000) 0.21951690399964718 >>> timeit(t2, number=10000) 1.4978306379998685 >>> timeit(t3, number=10000) 0.2213820789993406 Хм, а нам говорили что через "+" это плохо и медленно ))) 😁 Тут стоит учитывать, что речь идёт о склейке множества длинных строк. Давайте изменим условия: def t4(): t = 'text'*100 for _ in range(1000): s = t + t + t + t + t + t + t + t + t def t5(): arr = ['text'*100] * 10 for _ in range(1000): s = ''.join(arr) def t6(): for _ in range(1000): s = 'text'*100 + 'text'*100 + ... # всего 10 раз >>> timeit(t4, number=10000) 12.795130728000004 >>> timeit(t5, number=10000) 2.642637542999182 >>> timeit(t6, number=10000) 0.2184546610005782 Вот, уже другой разговор, сразу видна разница, в среднем в 6 раз. Но погодите, почему последний тест t6() по скорости такой же как и t3()? Ведь строки теперь в 100 раз длиннее! Это вопросы оптимизации кода, какие простые изменения ускоряют или замедляют выполнение программы. Мы столкнулись с примером обхода обращения к переменной. Например, именно так работает директива #define в С++, во время компиляции подставляя значение переменной вместо ссылки на неё. В Python это тоже работает, но часто ли вы сможете встретить такой способ работы со строками? К сожалению, способ почти только теоретический. В целом, тесты показали то, что мы хотели. Делаем выводы самостоятельно. Полный листинг 🌍 #tricks
Пребарај: #saturnus
@MOONIVRSE · Post #49201 · 02.05.2023 г., 12:28
💥💥#Saturnus called Cardigan, Taylor Swift from our 𝗳𝗿𝗶𝗲𝗻𝗱𝘀 👨👩👧👦 which is #Awäa💄 just arrived! ★✩★ 𝘭𝘪𝘵𝘵𝘭𝘦 𝘯𝘰𝘵𝘦! ✧˚ 𓂃 If you like this song, thank you and also please don't repost. if you want to repost please send your permission to @Tembush before you repost.
@MOONIVRSE · Post #49198 · 02.05.2023 г., 12:22
💥💥#Saturnus called Tak Ingin Usai, Keisya Levronka from our 𝗳𝗿𝗶𝗲𝗻𝗱𝘀 👨👩👧👦 which is #Awäa💄 just arrived! ★✩★ 𝘭𝘪𝘵𝘵𝘭𝘦 𝘯𝘰𝘵𝘦! ✧˚ 𓂃 If you like this song, thank you and also please don't repost. if you want to repost please send your permission to @Tembush before you repost.
@MOONIVRSE · Post #49195 · 02.05.2023 г., 12:21
💥💥#Saturnus called Tak Segampang Itu, Anggi Marito from our 𝗳𝗿𝗶𝗲𝗻𝗱𝘀 👨👩👧👦 which is #Awäa💄 just arrived! ★✩★ 𝘭𝘪𝘵𝘵𝘭𝘦 𝘯𝘰𝘵𝘦! ✧˚ 𓂃 If you like this song, thank you and also please don't repost. if you want to repost please send your permission to @Tembush before you repost.
@MOONIVRSE · Post #49192 · 02.05.2023 г., 12:15
💥💥#Saturnus called Sampai Jadi Debu, Banda Neira from our 𝗳𝗿𝗶𝗲𝗻𝗱𝘀 👨👩👧👦 which is #Awäa💄 just arrived! ★✩★ 𝘭𝘪𝘵𝘵𝘭𝘦 𝘯𝘰𝘵𝘦! ✧˚ 𓂃 If you like this song, thank you and also please don't repost. if you want to repost please send your permission to @Tembush before you repost.
@MOONIVRSE · Post #48506 · 31.03.2023 г., 09:56
https://t.me/addtheme/uqKFF4Qom9DRfkBh 👩🏻🚀💄: *𝗕𝗢𝗢𝗠* 🤯🤯 Woah 😵💫😵... What was that 🤔🤔? Its was a super-duper big *boom* 💥💥 that just come to our 𝗯𝗲𝗮𝘂𝘁𝗶𝗳𝘂𝗹 𝗺𝗼𝗼𝗻 🌑🌕, and look. They giving us a super-duper adorable 𝗽𝗮𝗰𝗸𝗮𝗴𝗲 📦📦, lets check it now! Ooh 😯😯, its a #Saturnus called " Wonyoung Theme " from our 𝗳𝗿𝗶𝗲𝗻𝗱𝘀 👨👩👧👦, which is #Awäa💄. Ah, thank you @moonivrse lets check the licence first! Oh, its only for PU (Personal Use)
@MOONIVRSE · Post #47769 · 13.02.2023 г., 11:37
👩🏻🚀💄: *𝗕𝗢𝗢𝗠* 🤯🤯 Woah 😵💫😵... What was that 🤔🤔? Its was a super-duper big *boom* 💥💥 that just come to our 𝗯𝗲𝗮𝘂𝘁𝗶𝗳𝘂𝗹 𝗺𝗼𝗼𝗻 🌑🌕, and look. They giving us a super-duper adorable 𝗽𝗮𝗰𝗸𝗮𝗴𝗲 📦📦, lets check it now! Ooh 😯😯, its a #Saturnus called " Newjeans Minji Username " from our 𝗳𝗿𝗶𝗲𝗻𝗱𝘀 👨👩👧👦, which is #Awäa l. Ah, thank you @moonivrse lets check the licence first! Oh, its only for PU (Personal Use)
@MOONIVRSE · Post #47766 · 13.02.2023 г., 11:36
👩🏻🚀💄: *𝗕𝗢𝗢𝗠* 🤯🤯 Woah 😵💫😵... What was that 🤔🤔? Its was a super-duper big *boom* 💥💥 that just come to our 𝗯𝗲𝗮𝘂𝘁𝗶𝗳𝘂𝗹 𝗺𝗼𝗼𝗻 🌑🌕, and look. They giving us a super-duper adorable 𝗽𝗮𝗰𝗸𝗮𝗴𝗲 📦📦, lets check it now! Ooh 😯😯, its a #Saturnus called " Truffle Username " from our 𝗳𝗿𝗶𝗲𝗻𝗱𝘀 👨👩👧👦, which is #Awäa l. Ah, thank you @moonivrse lets check the licence first! Oh, its only for PU (Personal Use)
@MOONIVRSE · Post #47592 · 09.02.2023 г., 12:26
💥💥#Saturnus called I Wanna Be Yours, Arctic Monkey from our 𝗳𝗿𝗶𝗲𝗻𝗱𝘀 👨👩👧👦 which is #Awäa💄 just arrived! ★✩★ 𝘭𝘪𝘵𝘵𝘭𝘦 𝘯𝘰𝘵𝘦! ✧˚ 𓂃 If you like this song, thank you and also please don't repost. if you want to repost please send your permission to @Tembush before you repost.
@MOONIVRSE · Post #47589 · 09.02.2023 г., 12:24
💥💥#Saturnus called Hold It In, Treasure from our 𝗳𝗿𝗶𝗲𝗻𝗱𝘀 👨👩👧👦 which is #Awäa💄 just arrived! ★✩★ 𝘭𝘪𝘵𝘵𝘭𝘦 𝘯𝘰𝘵𝘦! ✧˚ 𓂃 If you like this song, thank you and also please don't repost. if you want to repost please send your permission to @Tembush before you repost.
@MOONIVRSE · Post #48596 · 02.04.2023 г., 00:17
👩🏻🚀🌙: *𝗕𝗢𝗢𝗠* 🤯🤯 Woah 😵💫😵... What was that 🤔🤔? Its was a super-duper big *boom* 💥💥 that just come to our 𝗯𝗲𝗮𝘂𝘁𝗶𝗳𝘂𝗹 𝗺𝗼𝗼𝗻 🌑🌕, and look. They giving us a super-duper adorable 𝗽𝗮𝗰𝗸𝗮𝗴𝗲 📦📦, lets check it now! Ooh 😯😯, its a #Saturnus called Haerin icons edit from our 𝗳𝗿𝗶𝗲𝗻𝗱𝘀 👨👩👧👦, which is #Réuvel. Ah, thank you @moonivrse lets check the licence first! Oh, its only for PU (Personal Use)
@MOONIVRSE · Post #48592 · 02.04.2023 г., 00:05
👩🏻🚀🌙: *𝗕𝗢𝗢𝗠* 🤯🤯 Woah 😵💫😵... What was that 🤔🤔? Its was a super-duper big *boom* 💥💥 that just come to our 𝗯𝗲𝗮𝘂𝘁𝗶𝗳𝘂𝗹 𝗺𝗼𝗼𝗻 🌑🌕, and look. They giving us a super-duper adorable 𝗽𝗮𝗰𝗸𝗮𝗴𝗲 📦📦, lets check it now! Ooh 😯😯, its a #Saturnus called Eunchae icons edit from our 𝗳𝗿𝗶𝗲𝗻𝗱𝘀 👨👩👧👦, which is #Réuvel. Ah, thank you @moonivrse lets check the licence first! Oh, its only for PU (Personal Use)
@MOONIVRSE · Post #48586 · 02.04.2023 г., 00:04
👩🏻🚀🌙: *𝗕𝗢𝗢𝗠* 🤯🤯 Woah 😵💫😵... What was that 🤔🤔? Its was a super-duper big *boom* 💥💥 that just come to our 𝗯𝗲𝗮𝘂𝘁𝗶𝗳𝘂𝗹 𝗺𝗼𝗼𝗻 🌑🌕, and look. They giving us a super-duper adorable 𝗽𝗮𝗰𝗸𝗮𝗴𝗲 📦📦, lets check it now! Ooh 😯😯, its a #Saturnus called Seeun icons edit from our 𝗳𝗿𝗶𝗲𝗻𝗱𝘀 👨👩👧👦, which is #Réuvel. Ah, thank you @moonivrse lets check the licence first! Oh, its only for PU (Personal Use)