TGTGInsighttelegram intelligenceLIVE / telegram public index
← Python Заметки
Назад кон каналите

TGINSIGHT SIMILAR POSTS

Најди сличен содржај

Изворен канал @pythonotes · Post #32 · 7 фев.

Погледај објаваПогледај оригинал

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

Hashtags

#define#tricks
Резултати

Пронајдени 1 слични објави

Пребарај: #dachenskoye

当前筛选 #dachenskoye清除筛选
DruschbaFM - English

@druschbaFm_en · Post #52818 · 03.04.2025 г., 07:55

Најди сличноПогледај

⚡️ 🇷🇺 🇺🇦⚔️ Ukraine Fronts on the Morning of 3 April⚡️ 🔴#Sumy Direction: 🔴In #Sudzha Sector, to the west, we assume that the video which recently emerged for Russian #Uspenovka {1st red↘️} was not actual. On Ukrainian soil reportedly: 🟡 In #Veselovka, the AFU counterattacked unsuccessfully. 🟡 At #Zhuravka, slight RFAF advance and fights in the centre. 🟡 In #Basovka, the battle continues with varying success. 🟡#Novenkoye - RFAF {2nd red⬆️}. 🟡 In #Kursk region, fighting continues north and east of the AFU controlled #Oleshnya. In #Guyevo the AFU offers fierce resistance. #Gornal remains AFU controlled. 🔴In #KrasnayaYaruga Sector, the battle for #Popovka {5th black↙️} and #Demidovka continued. 🗺 All on Map 1 🔴#Kharkov Direction: 🔴In #Liptsy and #Volchansk Sections, a lull. 🔴#Svatovo Front: 🔴 In #Kupyansk, #Borovaya Sector, no major changes. 🔴In #Liman Sector, fighting at #Katerinovka and #Novoye continues. 🔴In #Seversk Sector, Russian troops continued to attack in the area of #Belogorovka (#LPR). 🟡 In #Verkhnekamenskoye, a Russian assault group has entered the village, the battle for which has begun. 🗺 Map 2 🔴#ChasovYar Direction: 🔴In #ChasovYar and #Toretsk Sectors, the battle for the cities and nearby villages continued without major changes. 🔴#Pokrovsk Direction: 🔴 On the right Flank, far to the east, fighting continued at #Valentinovka, west of #Panteleymonovka (southwards in the area of #Aleksandropol, and further west for #Tarasovka. 🔴 South of the City, fierce counterbattles. In #Lysovka, the RFAF reportedly advanced northwards; the AFU reentered #Dachenskoye and #Zelenoye; fighting for the southeastern outskirts of #Kotlino continued. 🔴 On the left Flank, fierce counterbattles in the areas of #Udachnoye and #​​Novoaleksandrovka. 🟡#Preobrazhenka has been taken by the RFAF. 🟡 At#Bogdanovka, the battle continued. It is disputed that the fighting is already inside the village. 🔴#Komar Direction: 🔴In #Bogatyr Sector, fighting continues. #Konstantinopol is still embattled, as well as #Razliv is. 🔴 In #Komar Sector, Russian forces are fighting along the western bank of the 'Mokriye Yaly River' and have advanced to #Vesyoloye, which came reportedly under Russian control. On the approaches to #Shevchenko and in #VolnoyePole, the battle continued. 🔴#Zaporozhye Direction: 🔴In the #Orekhov Section, south of the city there is mainly positional fighting and Russian fire on AFU positions. To the west, the situation in the 4 contested villages is reportedly as follows: 🟡#Shcherbaki contested; 🟡#MalyeShcherbakito the west, still contested; 🟡#Stepovoye, further west as well; 🟡 In #Lobkovoye; the RFAF advanced into its northern part and took prisoners. Reportedly, there are only Russian paratroopers in the village for now. 🎬 Video 🗺 Map 3 🟡 Near #Kamenskoye, in the far west, the fighting continued, reportedly Russian stormtroopers are approaching the village. 💥 In the #DPR, the AFU dropped an IED on a passenger car in #Gorlovka, wounding 3 civilians. 💥 In #Kherson Direction, mutual strikes, and the AFU shelled several villages, resulting in several wounded and infrastructure damage. 💥#OldRussia: 🔵In #Kursk Region, the AFU attacked a power substation and a power facility, violating the 'energy ceasefire.' In #Belgorod region, Ukrainian UAVs targeted villages and farmsteads as well as vehicles, wounding several civilians. 💥#RestUkraine: 🔵 The RFAF struck a targets in #Kharkov, at least 14 Geranium UAV hits within 40 minutes were reported, #Slavyansk, #Dnepropetrovsk and #Zaporozhye. In #KrivoyRog, a company has been hit, according to Ukrainian channels by an Iskander ballistic missile, killing 4 people and wounding 14. ⚠️ The Term 'Reportedly' indicates that it is unconfirmed! 🎞 Video Source 🗺 Maps @olegtsarov; @petrenko_iHS; @creamy_caprice 📋 Sources: CC; Tsarov; 🇺🇦Fiend;⚡️2M;🐈Cat😼VK 🕰As of 3 Apr 2025; 06:35 GMT+3;📃2 Apr 📱 Join GLOBAL DEPTH to boost your TG Feed 💬Join Military Chat for Comments & Discussions 🇺🇦On Ukraine Observer you will find your daily independent Ukraine War Battle Update

Hashtags

#sumy#sudzha#uspenovka#veselovka#zhuravka#basovka#novenkoye#kursk#oleshnya#guyevo#gornal#krasnayayaruga#popovka#demidovka#kharkov#liptsy#volchansk#svatovo#kupyansk#borovaya#liman#katerinovka#novoye#seversk#belogorovka#lpr#verkhnekamenskoye#chasovyar#toretsk#pokrovsk#valentinovka#panteleymonovka#aleksandropol#tarasovka#lysovka#dachenskoye#zelenoye#kotlino#udachnoye#preobrazhenka#bogdanovka#komar#bogatyr#konstantinopol#razliv#vesyoloye#shevchenko#volnoyepole#zaporozhye#orekhov#shcherbaki#malyeshcherbaki#stepovoye#lobkovoye#kamenskoye#dpr#gorlovka#kherson#oldrussia#belgorod#restukraine#slavyansk#dnepropetrovsk#krivoyrog