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: #tpfam
@tokenpocket_channel · Post #1738 · 01.01.2026 г., 09:00
🎆 Happy New Year! #TPFam We wish you glowing health, top-tier security for all your assets, and a market that stays eternally bullish. 🌕 May this year bring you boundless prosperity and exciting opportunities in crypto!
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@tokenpocket_channel · Post #1256 · 02.03.2024 г., 14:53
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@tokenpocket_channel · Post #1163 · 30.01.2024 г., 09:21
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@tokenpocket_channel · Post #1753 · 22.01.2026 г., 06:59
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@tokenpocket_channel · Post #1186 · 05.02.2024 г., 07:06
With the unwavering support from [#TPFam](https://twitter.com/hashtag/TPFam), 2023 has been a year of significant breakthroughs! 🎯 Always have a BIG Thanks in my mind and thank you for helping us make everything possible! 💙 Dive into the [#TokenPocket](https://twitter.com/hashtag/TokenPocket) 2023 Annual Report 👇 https://tokenpocket-gm.medium.com/tokenpocket-2023-annual-report-3b9bd4025f83 【Details】https://twitter.com/TokenPocket_TP/status/1754399781915631720 【Powered By】Crypto Box
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@tokenpocket_channel · Post #1170 · 02.02.2024 г., 01:40
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@tokenpocket_channel · Post #1144 · 25.01.2024 г., 03:35
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@tokenpocket_channel · Post #1042 · 24.12.2023 г., 12:14
🧑🎄Merry Christmas! #TPFam#TokenPocketChristmas ❄️May your wallets be filled with joy, your transactions be seamless, and may the blockchain of happiness bless you with endless prosperity. Wishing you a Merry Christmas and a crypto-filled New Year! 🚀🌟 👉https://www.tokenpocket.pro/ 【Details】https://twitter.com/TokenPocket_TP/status/1738895386377601385 【Powered By】Crypto Box
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@tokenpocket_channel · Post #1187 · 05.02.2024 г., 07:55
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@tokenpocket_channel · Post #1336 · 07.05.2024 г., 09:27
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@tokenpocket_channel · Post #1168 · 01.02.2024 г., 09:28
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@tokenpocket_channel · Post #935 · 23.11.2023 г., 09:33
💕💕Happy #Thanksgiving! 🐔 Wishing You a Joyous Thanksgiving! Thank you for the unwavering support from #TPFam and #TokenPocket Partners! Keep Building! 🏃🏃♂️🏃♀️ 【Details】https://twitter.com/TokenPocket_TP/status/1727620906225373326 【Powered By】Crypto Box
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