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: #measles
@ncdcgov · Post #4423 · 10.01.2025 г., 10:23
Our #Measles situation report for weeks 45, 2024 has been published. The weekly report provides a summary of the #Measles epidemiological situation as at November 2024 and response activities in Nigeria. 🔗 Download, read, and share via: https://ncdc.gov.ng/ncdc.gov.ng/themes/common/files/sitreps/ac1f0718b5d4964c70a2de687309f94d.pdf
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@ncdcgov · Post #4277 · 14.05.2024 г., 08:48
#Measles is highly infectious. Early symptoms are high-grade fever, cough, runny nose, red eyes & tiny white spots in the mouth. Please report immediately to a health facility when these symptoms are observed. Read more via: https://ncdc.gov.ng/diseases/info/M
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@ncdcgov · Post #4228 · 22.03.2024 г., 07:45
REDNESS OF THE EYE is an early indication of #Measles when observed with symptoms like high-grade fever, running nose, dry cough & tiny spots in the mouth. Please report immediately to a health facility when these symptoms are observed. Visit https://ncdc.gov.ng/diseases/info/M for more information.
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@ncdcgov · Post #4152 · 08.01.2024 г., 08:06
#Measles is highly infectious. Early symptoms are high-grade fever, cough, runny nose, red eyes & tiny white spots in the mouth. Please report immediately to a health facility when these symptoms are observed. Read more via: https://ncdc.gov.ng/diseases/info/M
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@ncdcgov · Post #4126 · 11.12.2023 г., 14:24
Runny nose, red eyes, cough, high fever and tiny white spots in the mouth are early symptoms of #measles infection. Seek immediate medical attention if you experience these symptoms or notice them in your loved ones. Visit https://ncdc.gov.ng/diseases/info/M to read more
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@ncdcgov · Post #3975 · 05.09.2023 г., 08:49
#Measles is highly contagious. Take all persons showing symptoms of the disease to the nearest healthcare centre for accurate diagnosis and treatment. Read more via https://ncdc.gov.ng/diseases/info/M
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@ncdcgov · Post #3696 · 19.01.2023 г., 14:23
#Measles is an acute, highly infectious disease with initial symptoms of high-grade fever, cough, runny nose, red eyes & tiny white spots in the mouth. Please report to a health facility immediately if you experience these symptoms.
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@ncdcgov · Post #3664 · 27.12.2022 г., 12:37
RUNNING NOSE is an early indication of #Measles when observed with symptoms like high fever, red eyes, dry cough & tiny spots in the mouth. Please report immediately to a health facility when these symptoms are observed. Visit https://ncdc.gov.ng/diseases/info/M for more.
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@ncdcgov · Post #3659 · 23.12.2022 г., 11:50
REDNESS OF THE EYE is an early indication of #Measles when observed with symptoms like high-grade fever, running nose, dry cough & tiny spots in the mouth. Please report immediately to a health facility when these symptoms are observed. Visit https://ncdc.gov.ng/diseases/info/M for more.
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@ncdcgov · Post #3657 · 22.12.2022 г., 13:38
#Measles is highly contagious. Isolate all suspected cases of the disease and take them to the nearest healthcare facility immediately. Read more via https://ncdc.gov.ng/diseases/info/M
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@ncdcgov · Post #3655 · 21.12.2022 г., 12:53
#Measles is an acute, highly infectious disease with initial symptoms of high fever, cough, runny nose, red eyes & tiny white spots in the mouth. Please immediately report to a health facility if you experience these symptoms. Read more: https://ncdc.gov.ng/diseases/info/M
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@ncdcgov · Post #4185 · 06.02.2024 г., 14:41
#Measles is not just a rash. Routine immunisation must remain a priority for parents and caregivers. #TakeResponsibility to prevent the spread of such as #Measles.
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