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: #skillsfuturesg
@skillsfuturesg · Post #517 · 08.01.2024 г., 10:28
📈 Are employers ready to navigate the shifting demands of the economy? Benjamin Chua, Founder & CEO of SPECO, shares an insightful roadmap on for navigating the evolution of the workforce with the Skills Demand for the Future Economy 2023/24 report. Read more: https://go.gov.sg/20240108tg#SkillsFutureSG#lifelonglearning
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@skillsfuturesg · Post #484 · 13.11.2023 г., 10:30
🚢 From business graduate to manager in the Maritime industry, Kumaresh pursued a dream that sparked off during his internship. Book a free consultation with a Skills Ambassador today: https://go.gov.sg/ssg-20231113tg#SkillsFutureSG#lifelonglearning
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@skillsfuturesg · Post #336 · 28.10.2022 г., 04:03
SSG has signed an MOU with the Institute for Adult Learning Singapore and SUTD Singapore University of Technology & Design to drive cyber-physical learning in the fields of higher education and lifelong learning. The collaboration includes a joint Living Lab, which will allow the study of "live" interaction between the instructors and learners, and use the insights to develop andragogies, professional practices and educational innovations for adult educators and CET learners, leading to higher quality and relevant training for Singaporeans. #SkillsFutureSG#lifelonglearning
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@skillsfuturesg · Post #446 · 19.08.2023 г., 10:01
🎉 Big thanks to all who joined us the past 7 weeks at SkillsFuture Festival 2023! Let's continue to embrace #lifelonglearning and get ready to join us again next year for more knowledge, skills, and inspiration. 🌟📚 #SkillsFutureFestival#SkillsFutureSG
@skillsfuturesg · Post #443 · 10.08.2023 г., 04:00
🚨 Final week alert! 🚨 SkillsFuture Festival 2023 is coming to a close, but the learning activities are as exciting as week 1 ⚡️. Check out the full lineup here: go.gov.sg/sffest2023 #SkillsFutureFestival#SkillsFutureSG#lifelonglearning
@skillsfuturesg · Post #440 · 03.08.2023 г., 04:00
🌟 Weekly Highlights Alert! 🌟 7-13 August: Embrace a week filled with empowering events and activities designed to supercharge your skills and ignite your career! Check out the full lineup here: go.gov.sg/sffest2023 #SkillsFutureFestival#SkillsFutureSG#lifelonglearning
@skillsfuturesg · Post #437 · 27.07.2023 г., 04:19
🌟 Weekly Highlights Alert! 🌟 From July 31st to August 6th, an incredible lineup of exclusive events and activities await you. Embrace the journey of lifelong learning with us! Check out the full lineup here: go.gov.sg/sffest2023 #SkillsFutureFestival#SkillsFutureSG#lifelonglearning
@skillsfuturesg · Post #522 · 11.01.2024 г., 04:01
🤩 From interior design to sound engineering, Chan Chue proves that the pursuit of knowledge knows no age limits. Inspired to learn a new skill? Filter to your course of interest here: https://go.gov.sg/ssg20240111tg#SkillsFutureSG#lifelonglearning#OwnYourSkills
@skillsfuturesg · Post #480 · 27.10.2023 г., 09:58
Announced today by DPM Lawrence Wong, #ForwardSG report unveils more upskilling and reskilling support for mature mid-career Singaporeans to thrive and build career resilience in a fast-changing economy. #SkillsFutureSG#lifelonglearning
@skillsfuturesg · Post #325 · 18.10.2022 г., 10:49
The Industrial Transformation Asia-Pacific 2022 (ITAP 2022) opens today till 20 Oct at the Singapore EXPO Convention & Exhibition Centre. To encourage enterprises to invest in their workers’ skills development alongside business transformation, @SkillsFutureSG also showcased initiatives, such as the SkillsFuture Queen Bee, SkillsFuture Career Transition Programme and the SkillsFuture Work-Study Programme, alongside Industry Connect talks by partners to share insights and case studies over the 3-day trade event. DPM Heng also launched the refreshed Industry Transformation Maps across five sectors at ITAP 2022, in line with Singaporeans goal to grow manufacturing value-added (VA) by 50% from 2020 to 2030. This will be done by focusing on innovation, embracing sustainability and training talent to seize job opportunities. #SkillsFutureSG#ITAP2022#I4.0
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