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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: #earthquakes
@Enviro_Climate · Post #361 · 30.07.2021 г., 10:34
Did you know #earthquakes can cause changes to #groundwater levels thousands of miles away from the epicenter? ©usgs.gov Read more»» ▫️waterdata.usgs.gov/1 ▫️water.usgs.gov/2 @Enviro_Climate
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@interesting_planet_facts · Post #935 · 19.10.2025 г., 18:11
🌎 The 1811–1812 New Madrid earthquakes were among the most powerful in U.S. history, causing the Mississippi River to flow backward briefly and forming new lakes. They triggered over 2,000 aftershocks and reshaped the landscape across multiple states. ✨ #earthquakes⚡#history⚡#Mississippi 👉subscribe Interesting Planet 👉more Channels
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@amazingeo · Post #613 · 04.02.2026 г., 20:31
🌍 Some earthquake "swarms" can hit the same spot repeatedly over weeks or months, releasing energy in small bursts instead of one big quake—often in volcanic or tectonic hot zones. ✨ #earthquakes⚡#tectonics⚡#geology⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography 👉more Channels
@amazingeo · Post #575 · 14.01.2026 г., 12:31
🌍 The planet’s largest earthquake ever measured—a magnitude 9.5—struck Chile in 1960. This event released so much energy it caused land to drop by up to two meters along the coast. ✨ #tectonics⚡#earthquakes⚡#geology⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography 👉more Channels
@amazingeo · Post #534 · 24.12.2025 г., 20:31
🌍 One of the fastest-moving tectonic faults is in Turkey, with plates shifting up to 23 millimeters per year. This constant motion makes the region prone to frequent, sometimes devastating earthquakes. ✨ #tectonics⚡#earthquakes⚡#geology⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography 👉more Channels
@amazingeo · Post #502 · 08.12.2025 г., 20:31
🌍 Some tectonic plate boundaries move so slowly they create “silent earthquakes”—huge shifts that happen over days or weeks, releasing energy without sudden shaking. ✨ #tectonics⚡#earthquakes⚡#geology⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography 👉more Channels
@amazingeo · Post #234 · 14.09.2025 г., 09:12
🌍 Some large earthquakes can trigger aftershocks that last for months or even years. These smaller quakes are part of the Earth’s ongoing adjustment after a major tectonic shift. ✨ #tectonics⚡#earthquakes⚡#geology⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography🌍
@amazingeo · Post #160 · 02.09.2025 г., 03:12
🌍 The strongest earthquakes ever recorded can move entire cities by several meters in seconds. In 2011, Japan’s coastline shifted east by up to 5 meters due to a massive plate boundary quake. ✨ #earthquakes⚡#tectonics⚡#geology⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography🌍
@amazingeo · Post #122 · 26.08.2025 г., 20:12
🌍 The San Andreas Fault in California allows two massive tectonic plates to slip past each other. This boundary creeps a few centimeters each year but can unleash powerful earthquakes in sudden jolts. ✨ #tectonics⚡#earthquakes⚡#geology⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography🌍
@amazingeo · Post #80 · 20.08.2025 г., 00:12
🌍 In Greenland, glaciers sometimes move so quickly they cause tiny earthquakes called "glacial quakes." These movements can shift enough ice to be detected by seismometers far away. ✨ #glaciers⚡#Greenland⚡#earthquakes⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography🌍
@amazingeo · Post #353 · 09.10.2025 г., 20:31
🌍 The deepest earthquakes ever recorded happen over 700 kilometers below Earth's surface, where extreme pressure causes rocks to slip even in the mantle, far beneath the familiar crust. ✨ #platetectonics⚡#earthquakes⚡#geology⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography 👉more Channels
@amazingeo · Post #655 · 08.03.2026 г., 20:31
🌍 The Himalayan Mountains are still rising today because the Indian plate keeps pushing into the Eurasian plate. This slow but relentless movement also triggers powerful earthquakes in the region. ✨ #platetectonics⚡#earthquakes⚡#mountains⚡#geography⚡#nature⚡#earth 👉subscribe Amazing Geography 👉more Channels