Најди сличен содржај

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

Hashtags

#define #tricks

Резултати

Пронајдени 2 слични објави

Пребарај: #militaryescalation

当前筛选 #militaryescalation清除筛选

Crypto M - Crypto News

@CryptoM · Post #65058 · 10.04.2026 г., 17:08

Најди слично Погледај

🚀 Israel-Hezbollah Conflict Complicates U.S.-Iran Relations The ongoing conflict between Israel and the Iran-backed Lebanese militia Hezbollah is adding complexity to the United States' efforts to resolve its longstanding tensions with Iran. Bloomberg posted on X, highlighting the intricate geopolitical dynamics at play. The hostilities between Israel and Hezbollah have intensified, with both sides engaging in military actions that threaten to escalate further. This situation is complicating U.S. diplomatic strategies aimed at de-escalating tensions with Iran, as Hezbollah's actions are closely linked to Iranian interests in the region. The U.S. has been attempting to negotiate with Iran to address various issues, including nuclear capabilities and regional influence. However, the involvement of Hezbollah, a significant player in the Middle East conflict, poses challenges to these diplomatic efforts. As the situation unfolds, the international community is closely monitoring developments, with concerns about potential broader implications for regional stability. The U.S. continues to navigate these complex relationships, seeking a resolution that addresses both its strategic interests and the security concerns of its allies in the region. #Israel#Hezbollah#USIranRelations#MiddleEastConflict#Geopolitics#USDiplomacy#Iran#Lebanon#RegionalStability#NuclearNegotiations#MilitaryEscalation#InternationalRelations

Hashtags

#israel #hezbollah #usiranrelations #middleeastconflict #geopolitics #usdiplomacy #iran #lebanon #regionalstability #nuclearnegotiations #militaryescalation #internationalrelations

Crypto M - Crypto News

@CryptoM · Post #65254 · 12.04.2026 г., 10:37

Најди слично Погледај

🚀 Oil Prices May Rise as U.S.-Iran Talks Fail, Says Saxo Bank Strategist Saxo Bank's Chief Investment Strategist, Charu Chanana, has commented on the recent failure of U.S.-Iran negotiations, describing it as a setback. According to Jin10, this development suggests that previous easing trades might dissipate, potentially leading to a rise in oil prices and a renewed impact on risk sentiment. The Strait of Hormuz remains a significant chokepoint risk, even if it is not completely closed. Chanana noted that the substantial differences in positions between the two parties on nuclear safeguards and the Strait of Hormuz issues make this outcome unsurprising. For the U.S. dollar, this situation could mean a resurgence of safe-haven support, although a full-scale surge is unlikely unless there is a new military escalation. Gold might benefit from renewed geopolitical hedging demand, but the market is not expected to revert to the worst-case inflation shock scenario. #OilPrices#USIranTalks#SaxoBank#CharuChanana#RiskSentiment#StraitOfHormuz#USDollar#Gold#GeopoliticalHedging#SafeHaven#NuclearSafeguards#MilitaryEscalation#MarketImpact

Hashtags

#oilprices #usirantalks #saxobank #charuchanana #risksentiment #straitofhormuz #usdollar #gold #geopoliticalhedging #safehaven #nuclearsafeguards #militaryescalation #marketimpact