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: #sunni
@fight4f · Post #8825 · 15.10.2024 г., 09:00
伊斯蘭恐懼症 在西方單邊主義宣傳侵佔一定空間的國際大媒界, 伊斯蘭恐佈症在西方社會及親西方群體宣傳得非常成功, 不多不少也是遜尼派人口之中的極右派(Wahabism) ,接近(原教旨主義) Wahabism 思想及遜尼派社會一些人不良行為而被宣傳加工所導致。 #ABC #Sunni #Islam #Muslim
@YediotNewsChat · Post #4838 · 15.12.2023 г., 07:45
Graduates of #Deoband and #Wahhabi schools killed 12 people last night. In the terrorist attack on a police station in the Sistan region of Iran, 12 people were martyred and many were injured. The headquarters of the Jaish-ul-Adl terrorist group is in #Pakistan. They have been taught to be kind to infidels, but if you kill 5 Muslims, you will go to heaven. The funds of these groups are provided by America and Israel. Pakistan is a breeding ground for #Sunni terrorists. https://t.me/YediotNewsChat
@YediotNewsChat · Post #4843 · 15.12.2023 г., 08:49
The picture of the dead body of one of the #Sunni terrorists who invaded Iran's border post last night. They were wearing the uniform of the Iranian military forces. The rest of the #Wahhabi terrorists fled to Pakistan. They hide in the deserts of Pakistan for the next surprise attack on Muslims. Pakistan is the center of production of Wahhabi terrorists. The Wahhabis came to power in #Saudi_Arabia in 1922 by the #British. https://t.me/YediotNewsChat
@YediotNewsChat · Post #4896 · 17.12.2023 г., 17:40
Today, the funeral ceremony of 280 unknown martyrs was held in some cities of Iran with the presence of the president. The bodies of these martyrs have recently been discovered from under the ground in war zones. Despite the "DNA" test, some of the martyrs are still unknown. Because they don't know where their families are. In 1980, Iraq attacked Iran at the instigation of the #United_States with the cooperation of all #Sunni Arab countries to overthrow the Iranian Shiite government, but they did not achieve their goal. This war imposed on Iran was carried out with the participation of 80 countries and ended in 1988 with one million dead and wounded. Today, there is neither Saddam Hussein nor the terrorist #Baath Party of Iraq. But the more powerful Islamic Republic is fighting the Israeli terrorists in #Jerusalem since 1988. https://t.me/YediotNewsChat
@moscowphotog · Post #1489 · 08.03.2025 г., 13:48
"A new massacre against the #Alawites in the city of #Latakia, in the #Dattour neighborhood, al-Mazar junction. I beg all segments of the Syrian people, especially the #Druze, #Kurds, and any remaining members of the #Sunni community who still have a little humanity left in their hearts, to take to the streets in protest to stop these massacres against the innocent. These #massacres are not from yesterday, they are happening today, and as of moments ago, they are still being carried out by Syrian members of Hay’at Tahrir al-Sham #HTS, wearing their official uniforms. Please, save those who remain." https://t.me/CoastSyrian24/771