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: #demographics
@googlefactss · Post #39991 · 01.11.2025 г., 07:02
The country with least females is Qatar, having about 266 men for every 100 women, this is one of the world’s largest gender gaps, caused in part by male migrant labor from India, Nepal, Bangladesh and the Philippines. @googlefactss #Demographics#FunFact
Hashtags
@googlefactss · Post #39990 · 01.11.2025 г., 01:47
Based on 2023 data, Djibouti has around 83 men per 100 women, with 610k women vs 510k men. @googlefactss #Demographics#FunFact
Hashtags
@amazingeo · Post #15 · 10.08.2025 г., 00:12
🌍 In 1800, fewer than 1 billion people lived on Earth. Today, the world population has soared past 8 billion, with more than half living in urban areas like cities and large towns. ✨ #population⚡#urbanization⚡#demographics⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography🌍
@amazingeo · Post #211 · 10.09.2025 г., 13:12
🌍 By 2050, city dwellers are expected to make up nearly 70% of the global population. Urban areas are now growing twice as fast as rural regions, reshaping how billions of people live. ✨ #urbanization⚡#cities⚡#demographics⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography🌍
@amazingeo · Post #344 · 07.10.2025 г., 18:31
🌍 More than 1 in 3 people alive today live in just two countries—China and India. Together, their populations make up over 2.7 billion people, shaping trends in language, culture, and the global economy. ✨ #population⚡#demographics⚡#Asia⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography 👉more Channels
@amazingeo · Post #605 · 31.01.2026 г., 20:31
🌍 In November 2022, the world’s population reached 8 billion for the first time, doubling in just 48 years since 1974—a record pace in human history for global population growth. ✨ #population⚡#demographics⚡#growth⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography 👉more Channels
@amazingeo · Post #494 · 04.12.2025 г., 20:31
🌍 In 2023, India gained over 13 million people—more than the total population of some countries. This rapid growth boosts its status as the planet’s most populous nation. ✨ #population⚡#demographics⚡#growth⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography 👉more Channels
@amazingeo · Post #264 · 19.09.2025 г., 09:12
🌍 In 2023, Ethiopia recorded the world’s highest annual natural population increase, adding nearly 2.7 million people in a single year—more than many countries’ entire populations. ✨ #population⚡#demographics⚡#growth⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography🌍
@intnewsagency · Post #9345 · 22.04.2026 г., 15:27
Ukraine Considers Raising Retirement Age to 67 Facing a demographic crisis and labor shortages, Ukraine is considering raising the retirement age to 67. Currently, about 10.5 million pensioners equal the number of working-age citizens, straining the pension system. Experts warn the situation will worsen by 2040 due to an aging population. This discussion comes amid record population decline and restrictions on young Ukrainians leaving the country. #Ukraine#pension#demographics#crisis The main news of Russia and the world ishere.
@amazingeo · Post #305 · 27.09.2025 г., 20:31
🌍 Over one million people are added to the world population roughly every five days. The fastest-growing regions are now in parts of Africa, where birth rates remain among the highest globally. ✨ #demographics⚡#growth⚡#continents⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography 👉more Channels
@amazingeo · Post #592 · 25.01.2026 г., 12:31
🌍 In 2022, the number of international migrants reached an estimated 281 million—more than triple the figure from 1970—making up 3.6% of the world’s total population today. ✨ #migration⚡#demographics⚡#movement⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography 👉more Channels
@amazingeo · Post #38 · 12.08.2025 г., 20:12
🌍 India is now the world’s most populous country, with more people than any other nation. Its population surpassed 1.4 billion in 2023, highlighting rapid growth and demographic change. ✨ #India⚡#population⚡#demographics⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography🌍