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
☺️Farmix – Latest News Review and Upcoming AMA
Updates and changes:
➡️Increased RP for Lending in Farmix – in3⃣ The RP farm for providing liquidity in TON, USDT, NOT, stTON and tsTON, which can later be exchanged for protocol tokens, has been increased several times.
➡️ When closing a position, you can choose to convert LP into a credit token. At the moment, the function works in the $TON/$USDT pair and only for new positions. The update has fully prepared the team for the emergence of new highly liquid stablecoins with increased leverage up to 8x.
➡️Roadmap released
➡️ The formula for calculating the Estimate Profit indicator has been updated.
➡️ The #Farmix RP leaderboard in TMA has appeared.
🎙 The team announced an upcoming AMA session, where they will discuss the current results and plans of the project. The broadcast will take place on April 7 on the #Farmix Telegram channel at 19:00 UTC+3. You can ask questions through the form, and 3 participants with the most interesting questions will receive $USDT each.
📖 If you have any questions about the project, you can ask them in the chat. There is also a step-by-step text guide for opening a farm.
Farmix | Channel | Documentation
🙏TON Society just added SBT Points
For now not all SBTs have amount of points that their owners will receive, but a trend is already visible — the more valuable in terms of the number of points are #DeFi SBTs and for contributors to the blockchain.
If you want to earn more points you have you should definitely get these SBTs:
💎 8 more days to get🙏9,500 for two valuable SBT Farmix in the BroBot contest✋
💎12 days to get tBook SBT Late Night DeFi with general speed 🙏27,000 points.
#TON#BroBot#SBT#Farmix
😎–Hey Bro! $1,500 and free SBTs for you!
We’re launching a new quest with Farmix — leveraged lending liquidity protocol.
Prize pool: just gain 600 XP and hold Lending for a chance to win one of 150 $10 prizes, extra XP, and guaranteed #SBT from TON Society!
🚀Join the quest now and share with your Bros!
📖
Deadline: Dec. 27, 15.00 UTC
#TON#BroBot#contest#Farmix
🧑💻Review: Farmix – The Innovative Force in TON DeFi
☺️Farmix appeared relatively recently, it is a semi-finalist of #DoraHacks hackathon. In a nutshell, it is a marginal farming protocol that allows you to significantly increase the profitability of your farms by using leverage.
🪙 We have already tested their farming pools a couple of weeks ago, everything went well and without complications. At that time, the APR in the farms was very high, some pairs gave up to 9,000% APR. Below is a short guide for working with Farmix.
🐷 On average, #Farmix farms are 3-5 times higher than in #DEX pools. There are two options to earn income for providing your assets: Lending and Farms. We will look at the Farms option, because this is the most interesting:
🟡Log in to Farmix and connect your MTW wallet.
🟡 Go to the "Farmers" tab and find the pair you are interested in, for example we will use the STORM/TON pair.
🟡 First, select "Borrow asset" — this is the asset in which you will take a loan for leverage in the farm. In the case of the STORM/TON farm, only the TON loan asset is available.
🟡Enter in the $STORM/$TON fields how much STORM and TON you will provide as collateral. In #Farmix you can open a farm with one token, it is not necessary to provide both tokens, as the smart contract itself will convert the tokens into a 50/50 pair and form LP tokens.
🟡Select the leverage (Leverage slider) with which you want to open the farm. The higher the leverage, the higher the APR of the farm, but the liquidation risks also increase.
🟡Click Open position at the bottom, sign the transaction in the wallet and in a few minutes your first farm will be open.
⚠️Important: Please note that leverage is only provided for collateral in $TON , $USDT , $tsTON, $stTON, $NOT . Any position with leverage > 1 has its own health factor. HF > 1.3 is considered moderate, HF = 1 - the position is liquidated.
📊 At first glance, the guide may seem complicated, but everything is generally intuitive. If you have any questions about the work of the project, farms, etc., you can ask them 🔔in our chat. You will also receive RP points for staking and farming, more details in the "Reward activities" tab. And as usual #NFR#DYOR
Farmix | Channel | Project documentation