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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

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DWF Labs Broadcast

@Dwflabs · Post #173 · 22.01.2023 г., 09:54

​Now is the time and we are building!💎 The Open Network (TON) is growing strong developer communities in countries across the globe as our Hackathon provides developers with the necessary resources and guidance to build something incredible.🔥 Super excited to announce our INVITE-ONLY, on-site events. During our Hackathon this February, we will invite 6~10 teams that are looking to #buidl on #TON in a city that could be near you! Our goal is to empower builders and developers in local communities to create innovative applications, services and protocols with The Open Network. For the event, builders and developers will get a chance to meet and ask questions to a member of The TON Foundation and local TON developer specialist(s). The Q&A session will ensure that builders and developers are well equipped with knowledge about TON tools, incubation opportunities and building on TON mainnet. Join us on our mission to unite all blockchains and Web2 internet into one open network! If you want to attend and are excited to #BuildOnTon, please submit an introduction and your BUIDL idea! 🤓💻 To be eligible to WIN exclusive access, please abide by the following criteria: - Max. two people per team - Max. 150~250 words per pitch - Keep it concise and clear - Focus on value for the TON community - Submission period: Jan 18 (Wed) ~ Jan 25 (Wed) We are super keen to have developers from all over the world join us on our mission to build the next-gen internet. So, what are you waiting for? 💎SUBMITyour idea! The schedule of offline events during the TON global hackathon: Feb. 11-12: Taipei Seoul Bangkok Prague Feb. 18-19: Dubai Tel Aviv Tokyo Istanbul Singapore Feb. 25-26: Hong Kong Melbourne Saint Petersburg Hyderabad London

DWF Labs Broadcast

@Dwflabs · Post #165 · 20.01.2023 г., 00:00

​Now is the time and we are building!💎 The Open Network (TON) is growing strong developer communities in countries across the globe as our Hackathon provides developers with the necessary resources and guidance to build something incredible.🔥 Super excited to announce our INVITE-ONLY, on-site events. During our Hackathon this February, we will invite 6~10 teams that are looking to #buidl on #TON in a city that could be near you! Our goal is to empower builders and developers in local communities to create innovative applications, services and protocols with The Open Network. For the event, builders and developers will get a chance to meet and ask questions to a member of The TON Foundation and local TON developer specialist(s). The Q&A session will ensure that builders and developers are well equipped with knowledge about TON tools, incubation opportunities and building on TON mainnet. Join us on our mission to unite all blockchains and Web2 internet into one open network! If you want to attend and are excited to #BuildOnTon, please submit an introduction and your BUIDL idea! 🤓💻 To be eligible to WIN exclusive access, please abide by the following criteria: - Max. two people per team - Max. 150~250 words per pitch - Keep it concise and clear - Focus on value for the TON community - Submission period: Jan 18 (Wed) ~ Jan 25 (Wed) We are super keen to have developers from all over the world join us on our mission to build the next-gen internet. So, what are you waiting for? 💎SUBMITyour idea! The schedule of offline events during the TON global hackathon: Feb. 11-12: Taipei Seoul Bangkok Prague Feb. 18-19: Dubai Tel Aviv Tokyo Istanbul Singapore Feb. 25-26: Hong Kong Melbourne Saint Petersburg Hyderabad London