Python vs JavaScript - side by side comparison

Python vs JavaScript test of the relative performance.
As an example I took basic prime-finding algorithm with N² complexity.
All found primes are stored in a list/array and as the result scripts print the length of the list/array.
I tested a relative speed of code writing, including typos.
And the Python and JavaScript performance.
Python vs JavaScript - side by side comparison
• Python vs JavaScript -...
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[@RedEyedCoderClub]

I intentionally didn't use special Python algorithms for primes. I compared language "efficiency" using dumb algorithm implementation for both languages and equal language "tools"
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[@unton83]

ТГ канал без возможности комментировать?

[@RedEyedCoderClub]

@@unton83 пока да. Но можно здесь

[@jamesprice4074]

Came for the information, stayed for the background noise.

[@gianluke]

This is just because Python integers are boundless integers (like BigInteger in Java), while JavaScript numbers are fixed-size floating point numbers. This is the same reason Python 3 is usually slower than Python 2 (which used fixed-size integers when possible).

[@pylsur2024]

That's right, 6.3 seconds here with using numpy and numba. With doing some algorithm optimizations I get down to less than 0.5 seconds for this in python.

[@suomynona7261]

Awesome video, great channel name

[@soufianta8374]

Hi. Very dumb programming question probably but how does the function deal with the different return values of the different blocks inside of it (for and if blocks)? If if the if block returns “false”, the for block returns “true” anyway or did I misunderstood something? Thanks.

[@AdityaGowda2000]

Return statement means function call is over. So 2 return statements will never be execuited.

[@Doonutzs]

As soon as you return the value you get out of the function. You could have an if with a return and then a simple return at the end of the function. If the if condition is fulfilled the last return will never be executed

[@soufianta8374]

@@Doonutzs thanks Kuroox. It's clear now.

[@Doonutzs]

@@soufianta8374 you're welcome mate :3

[@loftyTHEOWNER]

ok but what if you use tuples or numpy or numba?

[@SnehilKankran-qe8si]

For a experienced devolper , Js is easily readable too

Me tooo

[@ahmet-akin]

I think node.js is better. We can already make code writing shorter in node.js.

[@atlantic_love]

But then you're asking the user to have node.js on their system. Or to rely on a CDN that could fail at any time.

[@TdadadT9]

Its just python with C implementation under the hood :) Just use pypy in order to achieve best performance in CPU bound operations.

[@RedEyedCoderClub]

You are right. But nevertheless I was a bit shocked, because the difference is huge.

[@user-kn6uu8cc6l]

@@RedEyedCoderClubAlso try use list comprehension insteed of loop, it can increase speed

[@RedEyedCoderClub]

I tried to use similar language tools, and JavaScript has no list comprehension. And btw when I used a list comprehension (I tried it) the difference is not so significant as it seems to be.

[@blackjew6827]

By that point just use C / C++

[@waterdrop4572]

Shu yotube pyhton da yozilganmi?

[@Alexey-gp7vc]

Yeap, CPython have no JIT (in this version), so... But if you compare Py and JS in more real world scenario with db and async network things - you can't see much difference. Mostly JS faster. But sometimes Py can be faster bc of the best integration with C.
Btw, if you need speed - you use Numpy or PyPy/numba/pypyc or Cython. Or even Java, Go, Rust, C, Fortran, etc 😀

[@manoharrajput8660]

Any one help me to choose my next course about programming, My goal is data analyst and I have knowledge about SQL and now I would like to learn programming language but I am not belong from engineer background so which one is better for me either python or java?

[@RedEyedCoderClub]

For Data Analysis you need Python, and not Java

[@mb-kw9es]

​@@RedEyedCoderClub how about developing an android apps

[@RedEyedCoderClub]

@@mb-kw9es I don't get your comment

[@arun-poudel]

Mojo is comming 🔥🔥🔥🔥🔥

[@francko.j]

instead of return put yield in python and see the power of python

[@JoaoZati]

Show a exeple

[@Thekingslayer-ig5se]

Yes yield is much faster

[@MundodasGuitarras]

Really? Is that the case for everything?

[@im_vanich]

Не сходится.
Питон быстрее.
Что за версия у вас?
Проверяли в 3 человека на разных компах.

[@JohnJohnson-ch6xq]

I have been studying for cloud computing.
I want to know if I should consider JavaScript or Python?
Please advise.

[@madebyabhi12]

Javascript

[@SnehilKankran-qe8si]

If you think 9.4sec is fast
Use bun js to see the ultimate speed of JavaScript

[@arun-poudel]

Use mojo 🔥 😂😂😂 no competition with any js runtime

[@NH-ij8dz]

On a i5 10600k and using multi processing you can get this down to 25 seconds on python. If you use pypy's Jit you can get it down to below 5s.
def process():
"""Splits the task into multiple parts"""
current_min = 2
tasks_per_worker = 250001 // 12
tasks = []
for _ in range(12):
tasks.append(
multiprocessing.Process(
target=, args=(current_min, current_min + tasks_per_worker)
)
)
current_min += tasks_per_worker
# Start and await tasks.
for task in tasks:
task.start()
for task in tasks:
task.join()

[@jorge.barcelos]

I did the same test, same algorithm, same python version in wsl. Result: 0.06s user 0.00s system 99% cpu 0.061 total

[@ktmar4276]

I am surprised🦎

[@RedEyedCoderClub]

Actually me too!

[@NewLondonMarshall]

The code formatting on the JavaScript side hurt me. No spaces in the for loop variable declaration check and increment, no space between the closing parenthesis and the opening curly brace. Ouch

[@smash3689]

You can write however you want. Blame the op. If you want to force some formatting, use linter.

[@Fayroll5]

Python: compiles everything then runs
Js: compiles 1 line and runs it

[@ThankYouESM]

Was super excited when first clicked because I thought this would finally show me how to swap each Python syntax to become Javascript syntax. However... OpenAI Codex is somewhat helping me build such an app, held back because the input allowance is far too limited whereas shortening the script keeps breaking it far too much.

[@RedEyedCoderClub]

Didn't get your point

[@ThankYouESM]

@@RedEyedCoderClub I thought this video would compare each syntax side-by-side for us to create Javascript projects from our Python scripts near as possible.

[@Anastasia-cv4ld]

@@RedEyedCoderClub he thought this video would be a sort of guide on how to convert a python program to a JavaScript program

[@RedEyedCoderClub]

@@Anastasia-cv4ld For a minute? Ha-ha!

[@jss_developer1432]

@@RedEyedCoderClub no, just like a quick side by side comparison of lets say variables, object,arrays,functions, setup, other js features, etc...

[@thiagom5195]

I think that this is not a good python code, when do in python range(2, 250001) it will create a list with each element from 2 to 250001 before do the "for". this create a horrible performace code.

[@tah9r]

What is the color theme in this video?

[@RedEyedCoderClub]

I used NvChad distribution in this video, and it uses One Dark theme.
nvchad.com/

[@tah9r]

@@RedEyedCoderClub thank you

[@sergeyshevtsov5125]

Wow. Huge gap between them

[@RedEyedCoderClub]

Yep, it's a great surprise.

[@Mangokyaw]

@@RedEyedCoderClubJS wins?

[@rishabh2k01]

​@@Mangokyawyup with great margin

[@albumin30days90]

never use loops in python
rule #1
of 1 rules

[@KAMELLTDK]

Rise for Py

[@avbolshakov]

nvim? not atom?))

[@RedEyedCoderClub]

In this video I used nvim, because it's loaded instantly.

[@mohit84604]

node js is blazingly fast

[@Ryguy12543]

now do this with node.js and fastapi.

[@revengerwizard]

Comparing a traditional interpreter with a JIT compiler…

[@FlanPoirot]

python has had 20 years to move into jit compilation and decided not to, instead it became a VM language with a unstable instruction set (meaning it's a moving target and people can't write a compiler using it as IR). in my book that's kinda python's fault for neglect performance and a whole slew of tooling that was essential.
they're trying to slowly improve the language now but by now there's too big a baggage and the effort will take years and years and idek how much they'll be able to achieve

[@revengerwizard]

@@FlanPoirot I know, but still comparing the two rather different implementations doesn't do any justice.
Comparing C vs Python for example wouldn't give you much information, out of the fact that one is statically compiled while the latter is a traditional bytecode interpreter.
But it's true, CPython implementation is pretty much a big mess overall.

[@igweogba6774]

To me Javascript is the best programming language. It runs in the browser, you can build everything from desktop apps to web and mobile apps with it and it is also pretty fast.

[@Aravindudhaya]

Python execution speed very slow. Any way both technologies to have know our holding our jobs.

[@AshtonMotana]

If JavaScript is thus much quicker than Python, then surely JavaScript would be better for data analysis.

[@RedEyedCoderClub]

Of course it's not better, like not better neither C++ and Go, and Rust. Python has the most minimalistic syntax - and it's the key.

[@AshtonMotana]

@Red Eyed Coder Club the example of the difference in syntax is negligible. The performance of JavaScript far outways this difference in syntax. I would like to see a comparison in performance regarding cleaning a CSV file of those pesky commas that are separating the same cell strings to prevent data misalignment in an automated fashion, then index and run through a simple algorithm that compares 10 columns of data and performance a date difference, creating new columns with that difference. With my JavaScript full stack app, I can clean and index a CSV with 89 columns and 750 thousand rows of data, in 7.5 seconds, and about another 7 seconds to run through the algorithm.

[@brogolem35]

@@AshtonMotana (From what I see)The performance is not a major problem for professional use because they will use third party libraries like NumPy (which use C under the hood) or use tools like PyPy and Cython (and maybe Mojo in the future). The only people that sufferm from Python's speed are newbies (including myself) and CS students that are forced to write big and complicated programs without any third party tooling (also myself).

[@rea1m_]

@@RedEyedCoderClub js syntax is pretty minimalistic too

[@leimai7611]

Sorry, I need one hour of this stuff.

[@alien432hz9]

Javascript comes from the island of Java.

[@dio_nellas]

Use numpy

[@ayami123]

lol you use if else? why not use ternary operations LOL

[@RedEyedCoderClub]

First of all if/else is more readable, secondly all big guys like Guido van Rossum, Andrey Svetlov, Yuri Selivanov, developers of Django and Flask, and many others use if/else. I never see ternary operator in significant products, because the readability counts.

[@ayami123]

@@RedEyedCoderClub i prefer cleaner code though

[@JuriBinturong]

@@ayami123 coding is meant for humans not the machine.

[@ayami123]

@@JuriBinturong lol basic programmer know how to use ternary plus it's much cleaner than if

[@AlphaDragons60]

@@ayami123 He didn't use if/else, he used only if and you can't use ternary operation here anyway since the code is
for(let i = 2; i

[@ibrahimoglu]

🤔

[@RedEyedCoderClub]

Yep, tomorrow I'll publish a video which is much more interesting and even a bit shocking.

[@chillydoog]

I got pynk eye

[@RedEyedCoderClub]

Thanks for comment

[@nagamanickam5702]

Python 3.11 is 25% faster, python 3.13 will be 5 times faster.. soon we will beat JS 😜

[@flemingstarsyiemlieh2125]

This guy is using nodejs... We also have bun which is 2.5 times faster

[@nathanfranck5822]

There's a loooong way to go

[@RedEyedCoderClub]

it will be cool!

[@_purple_44_]

In your dreams

[@nagamanickam5702]

@@_purple_44_ may be it won't, but still python is way cool 😎

[@hellelo.5840]

Python is more memory efficient.

[@sgmvideos5175]

that programming part was like... eh... I'd say made by somene who just wanted python to win... you could write JS version like this:
for (let i = 2; i < n; i++) if (n % i == 0) return false; return true;
or even
for (let i = 2; i < n; i++) if (!(n % i)) return 0; return 1;
it might not look so good, but it's way to make code shorter

[@RedEyedCoderClub]

Are you kidding? If I wanted Python to win I would use special Python libraries like numpy, scipy etc. thousands of them.
Your suggestion saved only 9 chars, but lost the readability. Awful TBH.

[@sgmvideos5175]

I mean, the only difference in these codes is the for loop syntax, you don't even need brackets there since it's so short...

[@RedEyedCoderClub]

ok, thank you for the comment

[@Eckster]

Just return the boolean directly.

[@rikoananda6189]

It can be even shorter and faster with this syntax:
for(let i=2;i

[@prietjepruck]

in Processing language on a Ryzen 7950x it took 2.8 sec.😀 Python is just ridiculously slow.🤮
int N = 250_001;
int prime[] = new int[N];
boolean isPrime(int n) {
for (int i = 2; i < n; i++) {
if (n % i == 0) return false;
}
return true;
}
void setup() {
surface.setVisible(false); // do not show the graphics canvas
int t = millis();
int teller = 0;
for (int i = 2; i < N; i++) {
if (!isPrime(i)) continue;
prime[teller] = i;
teller ++;
}
println(millis()-t);
}

[@WonderSpace4U]

JavaScript Best of the best

[@sashankshekharshukla2575]

CPython is way faster than JavaScript.

[@fuunnyvideospeedrun]

I'm sitting and waiting for js + ffmpeg to split a 30 minute video into 12 parts, and think maybe python would do it faster...
all video about python: im turtle bro...

[@learntechbasics]

Ffmpeg will take its sweet time irrespective of whether you use python or javascript

[@trollface1994]

i am groot.