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: #lassafeverinfo
@ncdcgov · Post #3871 · 22.06.2023 г., 12:02
#Lassafeverinfo Our latest Lassa Fever Situation Report has been published on our website (week 23). This week's situation report and that of previous weeks can be downloaded via https://ncdc.gov.ng/diseases/sitreps/?cat=5&name=An%20update%20of%20Lassa%20fever%20outbreak%20in%20Nigeria
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@ncdcgov · Post #3866 · 16.06.2023 г., 09:08
#Lassafeverinfo Our latest Lassa Fever Situation Report has been published on our website (week 22). This week's situation report and that of previous weeks can be downloaded via https://ncdc.gov.ng/diseases/sitreps/?cat=5&name=An%20update%20of%20Lassa%20fever%20outbreak%20in%20Nigeria
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@ncdcgov · Post #3741 · 20.02.2023 г., 14:43
#Lassafeverinfo Our latest Lassa Fever Situation Report has been published on our website (week 6). In this reporting week, a total of 68 confirmed cases were recorded. This week's situation report and that of previous weeks can be downloaded via https://ncdc.gov.ng/diseases/sitreps/?cat=5&name=An%20update%20of%20Lassa%20fever%20outbreak%20in%20Nigeria
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@ncdcgov · Post #3725 · 10.02.2023 г., 17:25
#Lassafeverinfo Our latest Lassa Fever Situation Report has been published on our website (week 4). This week's situation report and that of previous weeks can be downloaded via https://ncdc.gov.ng/diseases/sitreps/?cat=5&name=An%20update%20of%20Lassa%20fever%20outbreak%20in%20Nigeria
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@ncdcgov · Post #3704 · 24.01.2023 г., 18:09
#Lassafeverinfo Our latest Lassa Fever Situation Report has been published on our website (week 2). This week's situation report and that of previous weeks can be downloaded via https://ncdc.gov.ng/diseases/sitreps/?cat=5&name=An%20update%20of%20Lassa%20fever%20outbreak%20in%20Nigeria
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@ncdcgov · Post #3649 · 16.12.2022 г., 14:48
#Lassafeverinfo Our latest Lassa Fever Situation Report has been published on our website (week 49). This week's situation report and that of previous weeks can be downloaded via https://ncdc.gov.ng/diseases/sitreps/?cat=5&name=An%20update%20of%20Lassa%20fever%20outbreak%20in%20Nigeria
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@ncdcgov · Post #4416 · 25.10.2024 г., 11:05
In total for 2024, 1035 confirmed cases of #LassaFever have been recorded across 28 States in Nigeria. 🔗Download, read, and share our latest #LassaFever situation report via: https://ncdc.gov.ng/diseases/sitreps/?cat=5&name=An%20update%20of%20Lassa%20fever%20outbreak%20in%20Nigeria #LassaFeverInfo
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@ncdcgov · Post #4406 · 11.10.2024 г., 14:38
In total for 2024, 1018 confirmed cases and 172 deaths of #LassaFever have been recorded across 28 States in Nigeria. 🔗Download, read, and share our latest #LassaFever situation report via: https://ncdc.gov.ng/diseases/sitreps/?cat=5&name=An%20update%20of%20Lassa%20fever%20outbreak%20in%20Nigeria #LassaFeverInfo
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@ncdcgov · Post #4389 · 25.09.2024 г., 12:24
In total for 2024, 1005 confirmed cases of #LassaFever have been recorded across 28 States in Nigeria. 🔗Download, read, and share our latest #LassaFever situation report via: https://ncdc.gov.ng/diseases/sitreps/?cat=5&name=An%20update%20of%20Lassa%20fever%20outbreak%20in%20Nigeria #LassaFeverInfo
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@ncdcgov · Post #4282 · 20.05.2024 г., 14:17
In this week's #LassaFever situation report, we provide a summary of the epidemiological situation and response activities in Nigeria. 🔗Download, read, and share via https://ncdc.gov.ng/diseases/sitreps/?cat=5&name=An%20update%20of%20Lassa%20fever%20outbreak%ll20in%20Nigeria #LassaFeverInfo
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@ncdcgov · Post #4271 · 08.05.2024 г., 14:38
In this week's #LassaFever situation report, we provide a summary of the epidemiological situation and response activities in Nigeria. 🔗Download, read, and share via https://ncdc.gov.ng/diseases/sitreps/?cat=5&name=An%20update%20of%20Lassa%20fever%20outbreak%ll20in%20Nigeria #LassaFeverInfo
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@ncdcgov · Post #4270 · 08.05.2024 г., 10:17
You can not be too safe! #Lassafever presents with symptoms similar to those of many illnesses like malaria. Healthcare workers are urged to always have a high index of suspicion and practice standard infection prevention and control measures when attending to patients. #LassafeverInfo
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