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: #chupdate
@QuietWorld · Post #7553 · 11.08.2020 г., 22:30
Hi, last night, someone contacted me via Kiwi bot asking whether the quotes in this channel are taken from internet or my own quotes. So here's a screenshot of this channel's bio to answer that question ☺ #chupdate@quietworld🍃
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@QuietWorld · Post #7313 · 27.05.2020 г., 02:25
I really love this Telegram update where we can view more specific details of our channel ☺ & here I wanna thank all of you who stayed in this channel despite very few updates most of the time especially those 36.62% who enabled notifications for this channel 🥰 I thought everyone would mute this channel 😂 Anyway, stay safe, stay healthy wherever you are. ❤ #chupdate@quietworld🍃
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@QuietWorld · Post #7312 · 27.05.2020 г., 02:16
Hi peeps, how are you guys? It has been a long time I didn't post anything in here.. Life was stressful, now it is getting better but I'm still in a buffering mode though 😂 Will be updating more frequently soon 😉 #chupdate @quietworld🍃@qw_qwbot
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@QuietWorld · Post #7242 · 29.03.2020 г., 08:12
Anyway yeah I know I've been quiet for so long in this channel and suddenly now bombarding you with multiple posts at one time in this channel, well tbh this is the result of Movement Control Order (MCO) 😂 Since I was already at my hometown (a no network service area 🥺) when the MCO was announced, I'm stucked here. Yes, it is hard given that I've tasted 4G network and PUBG 😂 yet suddenly have to be stucked in a house with no network service and you can't even go out as often to search for network service due to the MCO, needless to say; going out for window shopping at least is a no no too to respect the order as well as to support and work together to prevent covid-19 from spreading. Thus, I have a lot of time to think and write (*type) post in this channel and all of them will be sent altogether once there's internet connection so yes that explains the sudden bombard of posts in this channel from time to time recently. 😌 So I guess, that's all for #chupdate this time. Stay safe everyone! @quietworld🍃
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@QuietWorld · Post #7234 · 26.03.2020 г., 07:57
Hi, just in case anyone is wondering where's marce; it's me. & just wanna say and remind us all to stay safe and abide to the government's order in effort to fight COVID-19. To Malaysians, Movement Control Order (MCO) has been started from 18th to 31st March and has been extended to 14th April recently. Kindly please, stay at home. When there's a need to buy groceries or other essentials, let only one person from your family to go out and buy them; remind them to practice social-distancing too. Practice good hygiene at all times; wash your hands frequently, avoid touching your face and stay at home. #chupdate@quietworld🍃
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@QuietWorld · Post #6995 · 30.11.2019 г., 02:11
Hi dear subs! 🙆🏻♀ Just for the record, while I'm in holiday mode, a friend of mine volunteered to be an admin in this channel to help me delete the ads and he also like to post some quotes now and then while I'm away. & you probably noticed him by now, his name is xXx 🤗 didn't get to #chupdate this earlier but here it is! anyway, thanks for staying in this channel & enjoy your stay! 😉 #chupdate@quietworld🍃
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@QuietWorld · Post #6952 · 23.11.2019 г., 07:05
Doing a little bit extra today! 😂 A shout out to those who contacted me through @qw_qwbot😘 #chupdate @quietworld🍃
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@QuietWorld · Post #6950 · 23.11.2019 г., 03:22
Hi everyone 😁 Thanks for subscribing & being loyal to this channel 😘 It's a long holiday for me now & I might as well be in holiday mode for my channel (posting VERY RARELY during this holiday which will last till January 2020, what I mean by VERY RARELY means, I might not post any content for dayssss 😭) I'm handling this channel alone all by myself, so there's no one else but me to post any content and no one else but me to delete ads that have been posted in this channel after 24hrs, thus, as you all know, when it's holiday, I'm going back to my hometown with no network service, so yeah, if you have stayed in this channel for quite a long time, you know how the story goes 😂 So my points are; 🍃 I'll be posting very very less frequent (might as well go for days or weeks without posting anything; except ads from the promo bots that I don't have any control to); 🍃 I'm not able to delete ads from the promo bots frequently so I'm very sorry if there's a long chain of ads left undeleted in this channel everytime you visit it throughout December 2019; 🍃 I appreciate your understanding especially because I'm handling this channel ALONE 🙆🏻♀ 🍃 Hope you guys stay subscribed and have a very pleasant and great holiday; enjoying the days left in 2019 while looking forward to 2020 with more motivation, inspiration and positive outlook😘 Love you guys! 😘 #chupdate @qw_qwbot📲 @quietworld🍃
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@QuietWorld · Post #6830 · 31.10.2019 г., 12:30
Hi, please 'allow' me to vent out in my channel because I don't have anywhere else to vent it out to. 😖🤗 🌹tons of posts incomingin about 30 mins!😬 #chupdate@quietworld🍃
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@QuietWorld · Post #7626 · 07.10.2020 г., 15:26
🦋It's me.☺️ https://instagram.com/ponderlog?igshid=1tks6whb4ka3m #chupdate#thoughts @quietworld🍃
@QuietWorld · Post #7621 · 05.10.2020 г., 07:28
Hi my lovely subscribers 😊 Here's a list of buttons which will direct to my Instagram Accounts for Mary Kay, Crystals & Cuckoo 😊 Do follow if you're interested 😉 Thank you 🌹 May your day be blessed with so much joy & love ❤️ #random#chupdate @quietworld🍃
@QuietWorld · Post #7442 · 25.06.2020 г., 04:04
So... how you guys doing dear subs? 😃 How are you feeling today? Don't be scared to click the comment button below, it acts similar like facebook and other social media apps 🥰 Do pop out, unleash and show yourself to me 😂 I would love to get to know my subscribers 🥰 #random#chupdate @quietworld🍃