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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: #bitcoinnews
@digitalgentop · Post #225 · 03.06.2024 г., 03:02
⚡️El Salvador’s Bitcoin, AI plans could boost GDP tenfold by 2029: Cathie Wood 💰The ARK Invest CEO praised the Central American country for being an “oasis” for Bitcoin and AI adoption. #Bitcoinnews #Cryptolover #Cryptosignals #Bitcointrading
@digitalgentop · Post #42 · 21.05.2024 г., 21:45
☄️Tether has exceeded Germany 🇩🇪 in terms of U.S. Treasury holdings, now sitting at the 19th position globally with $91 billion in bonds as of March 31st. Paul Ryan, former Speaker of the House, recommends regulating stablecoins given Tether's noteworthy influence on the digital dollar.💵🕯 #Cryptoeducation #Bitcoinnews #Cryptolover
@propheta_indicator · Post #23152 · 03.12.2025 г., 14:02
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@propheta_indicator · Post #23037 · 09.11.2025 г., 17:30
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@propheta_indicator · Post #22916 · 16.10.2025 г., 15:58
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@digitalgentop · Post #236 · 05.06.2024 г., 08:03
🕯Price analysis 5/30: BTC, ETH, BNB, SOL, XRP, DOGE, TON, SHIB, ADA, AVAX 💰Bitcoin remains in sideways price action, but a positive sign is that the investors have continued to buy the spot Bitcoin exchange-traded funds. 💰Farside Investors data shows net positive inflows into the ETFs for the past 11 days. #Cryptoeducation #Bitcoinnews #Cryptolover #Cryptosignals
@propheta_indicator · Post #23084 · 21.11.2025 г., 07:36
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@propheta_indicator · Post #23517 · 19.03.2026 г., 12:10
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@propheta_indicator · Post #23532 · 22.03.2026 г., 11:28
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@propheta_indicator · Post #23650 · 02.04.2026 г., 09:26
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@propheta_indicator · Post #23039 · 10.11.2025 г., 01:22
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@propheta_indicator · Post #22870 · 07.10.2025 г., 17:42
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