The 2ndDim: That was I talking about!
@The2ndDim · Post #1778 · 06.01.2023 г., 18:48
#推荐#HackerSpace#DIY#3D_Printing#HardwareHacking Youtube 频道推荐： https://youtube.com/@ZackFreedman Keywords: DIY 3D打印 硬件黑客 全程高能 骚话连篇 (?) 妙语连珠
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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
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Medet Turin
@allsafekz · Post #731 · 20.05.2025 г., 09:37
https://lnkd.in/e25HNh7A Alhamdulillah, I finished writing this book in few days. I wrote this book to help my friends: Nurkhankyzy Aiya, Acute myeloid leukemia (AML). and all those children who are fighting for their lives. Why is the book called that? AIYA MMD - means Attack and Introduction or (Android and IOS), start Your Adventure in Mobile Malware Development. also AIYA means AIYA Nurkhankyzy. I will be very happy if this book helps at least one person to gain knowledge and learn the science of cybersecurity. The book is mostly practice oriented. Of course the book is not as big as my previous works, this is because firstly I needed to urgently start a fundraising campaign for the Aiya and secondly many things remain confidential (NDA) Mobile malware - it's a constantly evolving battlefield. What you learned here is just the beginning. Tools change, defenses adapt, but the mindset stays the same: think like the adversary to build stronger defenses. This book is dedicated to my wife, Laura, and my children, Yerzhan and Munira. I would like to express my deep gratitude to my friends and colleagues. Special thanks to #Russian#hacking#community, Medet Turin 2600.kz, BlackIce #hackerspace from Almaty (Kazakhstan) and my friends from Middle East countries: Kingdom of Bahrain, Kingdom of Saudi Arabia, UAE. All examples are practical cases for educational and research purposes only. Book design by: Muhammad Patel twitter: https://x.com/cocomelonckz/status/1924724518951457229 #hacking#mobile#malware#research#book#programming#android#ios#rat#spyware
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@blackicehackerspace · Post #107 · 20.05.2025 г., 09:38
https://lnkd.in/e25HNh7A Alhamdulillah, I finished writing this book in few days. I wrote this book to help my friends: Nurkhankyzy Aiya, Acute myeloid leukemia (AML). and all those children who are fighting for their lives. Why is the book called that? AIYA MMD - means Attack and Introduction or (Android and IOS), start Your Adventure in Mobile Malware Development. also AIYA means AIYA Nurkhankyzy. I will be very happy if this book helps at least one person to gain knowledge and learn the science of cybersecurity. The book is mostly practice oriented. Of course the book is not as big as my previous works, this is because firstly I needed to urgently start a fundraising campaign for the Aiya and secondly many things remain confidential (NDA) Mobile malware - it's a constantly evolving battlefield. What you learned here is just the beginning. Tools change, defenses adapt, but the mindset stays the same: think like the adversary to build stronger defenses. This book is dedicated to my wife, Laura, and my children, Yerzhan and Munira. I would like to express my deep gratitude to my friends and colleagues. Special thanks to #Russian#hacking#community, Medet Turin 2600.kz, BlackIce #hackerspace from Almaty (Kazakhstan) and my friends from Middle East countries: Kingdom of Bahrain, Kingdom of Saudi Arabia, UAE. All examples are practical cases for educational and research purposes only. Book design by: Muhammad Patel twitter: https://x.com/cocomelonckz/status/1924724518951457229 #hacking#mobile#malware#research#book#programming#android#ios#rat#spyware