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: #dailycombo
@giiveaways · Post #3273 · 02.11.2024 г., 11:30
🪙MemeFiDaily Combo for November 2!(Same as yesterday) You need to press four places in the correct order, after which you will be given 1,500,000 💸 Press in the following order: 1️⃣💛3️⃣💛3️⃣💛2️⃣💛4️⃣ After tapping, wait 5-10 seconds to receive your reward. 🔔Subscribe👉Join MemeFi ⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️ #memefi#dailycombo#combo
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@giiveaways · Post #3254 · 22.10.2024 г., 08:48
🪙MemeFiDaily Combo for October 22!(Same as yesterday) You need to press four places in the correct order, after which you will be given 1,500,000 💸 Press in the following order: 1️⃣💛3️⃣💛3️⃣💛2️⃣💛4️⃣ After tapping, wait 5-10 seconds to receive your reward. 🔔Subscribe👉Join MemeFi ⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️ #memefi#dailycombo#combo
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@giiveaways · Post #3245 · 16.10.2024 г., 07:54
🪙MemeFiDaily Combo for October 16! You need to press four places in the correct order, after which you will be given 1,500,000 💸 Press in the following order: 1️⃣💛3️⃣💛4️⃣💛2️⃣💛3️⃣💛2️⃣ After tapping, wait 5-10 seconds to receive your reward. 🔔Subscribe👉Join MemeFi ⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️ #memefi#dailycombo#combo
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@giiveaways · Post #3199 · 27.09.2024 г., 07:06
🪙MemeFiDaily Combo for September 27!(Same as yesterday) You need to press four places in the correct order, after which you will be given 1,000,000 💸 Press in the following order: 4️⃣💛2️⃣💛4️⃣💛2️⃣ After tapping, wait 5-10 seconds to receive your reward. 🔔Subscribe👉Join MemeFi ⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️ #memefi#dailycombo#combo
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@giiveaways · Post #3193 · 24.09.2024 г., 20:09
🪙MemeFiDaily Combo for September 24!(Same as yesterday) You need to press four places in the correct order, after which you will be given 1,000,000 💸 Press in the following order: 4️⃣💛2️⃣💛4️⃣💛2️⃣ After tapping, wait 5-10 seconds to receive your reward. 🔔Subscribe👉Join MemeFi ⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️ #memefi#dailycombo#combo
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@giiveaways · Post #3173 · 23.09.2024 г., 07:30
🪙MemeFiDaily Combo for September 23!(Same as yesterday) You need to press four places in the correct order, after which you will be given 1,000,000 💸 Press in the following order: 4️⃣💛2️⃣💛4️⃣💛2️⃣ After tapping, wait 5-10 seconds to receive your reward. 🔔Subscribe👉Join MemeFi ⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️ #memefi#dailycombo#combo
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@giiveaways · Post #3160 · 22.09.2024 г., 07:00
🪙MemeFiDaily Combo for September 22!(Same as yesterday) You need to press four places in the correct order, after which you will be given 1,000,000 💸 Press in the following order: 4️⃣💛2️⃣💛4️⃣💛2️⃣ After tapping, wait 5-10 seconds to receive your reward. 🔔Subscribe👉Join MemeFi ⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️ #memefi#dailycombo#combo
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@giiveaways · Post #3156 · 20.09.2024 г., 12:37
🪙MemeFiDaily Combo for September 20!(Same as yesterday) You need to press four places in the correct order, after which you will be given 1,000,000 💸 Press in the following order: 4️⃣💛2️⃣💛4️⃣💛2️⃣ After tapping, wait 5-10 seconds to receive your reward. 🔔Subscribe👉Join MemeFi ⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️ #memefi#dailycombo#combo
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@giiveaways · Post #3142 · 19.09.2024 г., 13:39
🪙MemeFiDaily Combo for September 19!(Same as yesterday) You need to press four places in the correct order, after which you will be given 1,000,000 💸 Press in the following order: 4️⃣💛2️⃣💛4️⃣💛2️⃣ After tapping, wait 5-10 seconds to receive your reward. 🔔Subscribe👉Join MemeFi ⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️ #memefi#dailycombo#combo
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@giiveaways · Post #3115 · 14.09.2024 г., 08:54
🪙MemeFiDaily Combo for September 14! (Same as yesterday) You need to press four places in the correct order, after which you will be given 1,000,000 💸 Press in the following order: 4️⃣💛2️⃣💛4️⃣💛2️⃣ After tapping, wait 5-10 seconds to receive your reward. 🔔Subscribe👉Join MemeFi ⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️ #memefi#dailycombo#combo
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@giiveaways · Post #3102 · 13.09.2024 г., 07:58
🪙MemeFiDaily Combo for September 13! (Same as yesterday) You need to press four places in the correct order, after which you will be given 1,000,000 💸 Press in the following order: 4️⃣💛2️⃣💛4️⃣💛2️⃣ After tapping, wait 5-10 seconds to receive your reward. 🔔Subscribe👉Join MemeFi ⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️ #memefi#dailycombo#combo
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@giiveaways · Post #3078 · 11.09.2024 г., 10:44
🪙MemeFiDaily Combo for September 11! (Same as yesterday) You need to press four places in the correct order, after which you will be given 1,000,000 💸 Press in the following order: 4️⃣💛2️⃣💛4️⃣💛2️⃣ After tapping, wait 5-10 seconds to receive your reward. 🔔Subscribe👉Join MemeFi ⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️ #memefi#dailycombo#combo
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