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Изворен канал @pythonotes · Post #32 · 7 фев.

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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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CHELSEA NEWS 🗞️ 🔵

@Chelsea_fc_worldwide · Post #177022 · 29.04.2026 г., 14:36

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🚨 Chelsea are now looking at a list of around 7 or 8 names to take over permanently. One of those under consideration is Iraola. After hiring and firing 4 permanent coaches in as many years, the club do not want to rush this decision. (Simon Johnson Sport) #CFC

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CHELSEA NEWS 🗞️ 🔵

@Chelsea_fc_worldwide · Post #177017 · 29.04.2026 г., 09:34

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🚨 BREAKING: Chelsea captain Millie Bright has retired from football with immediate effect after 12 years, 314 appearances and 20 trophies. Bright will be staying on at the club as a trustee of the #CFC Foundation and starting a new role as a Chelsea ambassador. 🗣️ Bright: “Representing Chelsea over the last 12 years has been everything to me, but I'm now ready to say goodbye to playing football. I’ve given all I can, and I never wanted to fight for any other badge. “It’s now time, and I'm ready to go into a new era. I’m always going to be Chelsea, but just in a different way.” Chelsea will mark Bright’s retirement on May 16 at their final WSL game of the season against ManchesterUnited. 🔗 Ben Jacobs

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CHELSEA NEWS 🗞️ 🔵

@Chelsea_fc_worldwide · Post #177016 · 29.04.2026 г., 09:33

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🚨🇸🇳 Juventus are monitoring Nicolas Jackson, and can imagine a loan move for him. AC Milan are also monitoring. (Plettigoal) #CFC

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CHELSEA NEWS 🗞️ 🔵

@Chelsea_fc_worldwide · Post #176983 · 27.04.2026 г., 07:31

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🚨 Joe Cole tells Frank Lampard to stay away from Chelsea job: "Frank should stay away from it. The temptation for Frank, because he loves the club, would be to come back and give it another whirl." "If I was him, I wouldn’t go to Chelsea. In any job, you’re being judged on your results but [at Chelsea] you don’t have full control over what you can do. That’s insane." #CFC

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CHELSEA NEWS 🗞️ 🔵

@Chelsea_fc_worldwide · Post #176957 · 26.04.2026 г., 10:43

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🚨🇪🇸 Andoni Iraola would be more than happy to continue in the PL. He would be KEEN on becoming the next Chelsea manager! Nothing decided by Chelsea as in the early stages and nothing advanced. (Fabrizio Romano) #CFC

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CHELSEA NEWS 🗞️ 🔵

@Chelsea_fc_worldwide · Post #176753 · 16.04.2026 г., 14:57

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🚨BREAKING: Moises Caicedo to sign new Chelsea contract. [Via telegraph] 🚨🔵 BREAKING: Chelsea are closing in on new deal for Moisés Caicedo! The agreement will be valid until June 2033 with final details being sorted, as @CLMerlo reports. Caicedo has given green light to #CFC stay for long term. [Via Fabrizio Romano]

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CHELSEA NEWS 🗞️ 🔵

@Chelsea_fc_worldwide · Post #176641 · 09.04.2026 г., 21:14

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🚨 Breaking: Morgan Rogers likely to leave this summer even if Aston Villa get UCL. Chelsea, Arsenal, Liverpool, Utd are interested. £80m is the starting point figure for negotiations. #CFC looking for an attacker who can play off the left or central. [Via Ben Jacobs]

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CHELSEA NEWS 🗞️ 🔵

@Chelsea_fc_worldwide · Post #176257 · 18.03.2026 г., 19:48

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🚨 Fabrizio Romano: "There is something happening behind the scenes. My understanding is that there has been a conversation for some months between Enzo Fernandez and Chelsea to try to find a solution over contract terms to try to adjust the contract. At the moment, still no agreement." "If they can't find a solution, which I'm sure they will try to, Enzo could be open to exploring options in the summer." #CFC

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