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
🗣#Farcaster: Project Acquired by Neynar — What’s Next
Recently, the Farcaster founder announced
a shift from a social platform toward a crypto-wallet–first model.
Yesterday, another major update followed — Farcaster has been acquired by Neynar
Neynar
is the core infrastructure and API provider for Farcaster (similar to Alchemy or Infura), powering most applications, bots, and tools across the ecosystem.
What changes after the acquisition:
🟢 Farcaster founders step away from day-to-day operations to focus on new projects.
🟢 Part of the team joins Neynar, while others exit.
🟢 The protocol will continue operating and is not being shut down.
🟢 The $180 million in raised funding will be returned to investors
🟢 According to the founders,
Neynar is the best-positioned team to scale Farcaster further, with a strong focus on developers and infrastructure.
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✔ Check your Neynar points here
Neynar is expected to publish a detailed roadmap soon, outlining their vision for the future of the Farcaster protocol.
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📦UXLINK PROJECT — MINT IS LIVE ✅
🖥Guess what's finally happening? After months of keeping tabs on it, UXLINK is gearing up for some major airdrops! Plus, mark your calendar, the Minting of their NFTs, the golden tickets for this event, just live!
=============================
❓Why should you care?
🔘TGE is right around the corner, so grab the chance to join in and maybe even get ahead!
🔘The next super social platform is about to emerge, are you following?
🔘 Based on the latest insights from the whitepaper, The maximum supply of $UXLINK governance tokens is 1 billion, 40% of which will be distributed to community users.
🔘 Data analysis, compared to similar social projects, $Cyber's current market capitalization is about $1 billion, #Farcaster's last round valuation has already reached $1 billion, UXLINK is projected to skyrocket past $1.5 billion, possibly even hitting $2 billion post #TGE📈 Which mean UXLINK >= 1-1.5USDT
=============================
🌐Website || ✈️Telegram || ✖️Twitter
=============================
💎Go to mint your NFT and get airdrop:
Update : Uxuy × Okx
✅Login : https://dapp.uxlink.io/uxtask/okx
✅ My Account > Withdraw Uxuy
✅ Fee ETH Arb
✅ Mint NFT With UXUY Token : https://dapp.uxlink.io/uxnft
=============================
💎Giveaway 5 WL for 5 people
➡️Join our Tg :https://t.me/uxlinkofficial2
🔴Note:Please do your own research (DYOR) before joining to any project, also projects are 100% free. Don't send any fee or penny for receiving any token.
📦UXLINK PROJECT — MINT IS LIVE ✅
🖥Guess what's finally happening? After months of keeping tabs on it, UXLINK is gearing up for some major airdrops! Plus, mark your calendar, the Minting of their NFTs, the golden tickets for this event, just live!
=============================
❓Why should you care?
🔘TGE is right around the corner, so grab the chance to join in and maybe even get ahead!
🔘The next super social platform is about to emerge, are you following?
🔘 Based on the latest insights from the whitepaper, The maximum supply of $UXLINK governance tokens is 1 billion, 40% of which will be distributed to community users.
🔘 Data analysis, compared to similar social projects, $Cyber's current market capitalization is about $1 billion, #Farcaster's last round valuation has already reached $1 billion, UXLINK is projected to skyrocket past $1.5 billion, possibly even hitting $2 billion post #TGE📈 Which mean UXLINK >= 1-1.5USDT
=============================
🌐Website || ✈️Telegram || ✖️Twitter
=============================
💎Go to mint your NFT and get airdrop:
Update : Uxuy × Okx
✅Login : https://dapp.uxlink.io/uxtask/okx
✅ My Account > Withdraw Uxuy
✅ Fee ETH Arb
✅ Mint NFT With UXUY Token : https://dapp.uxlink.io/uxnft
=============================
💎Giveaway 5 WL for 5 people
➡️Join our Tg :https://t.me/uxlinkofficial2
🔴Note:Please do your own research (DYOR) before joining to any project, also projects are 100% free. Don't send any fee or penny for receiving any token.