Python vs Rust vs C++ Speed Comparison

This is a debug build speed comparison test, where the program calculates all prime numbers in the range of 1-100000. I used PyCharm for Python, CLion for C++ and RustRover for Rust.

Sound effects by Senna and Otto from Pixabay

[TommyLeeBlaze]

Great post! Just to add on, as someone already mentioned, it's best to compare production-ready builds. On my machine, Rust in debug mode runs at 1.6s (similar to your results), but in release mode, it finishes in 0.2s—about 8x faster!

[wassim-akkari]

rust debug mode is very slow because rust does far more checks in the run time, run rust with all optimizations enabled and in release mode then test the speed

[dyn]

How fast you can type out the code is a useless metric.

[Ekalai]

C++ performance depends on settings, optimization and compilers. If you twist the C++ ear or bite the tail, then see what happens?. 🌹🌹👌👌

[johnnybueti]

Suggestion: to completely remove the impacts (if any) of time measurement across languages, I would measure the execution time in the shell instead.

[softwaremkxvii]

Learn C/CPP from top to bottom, from inner to out and you will solve 90% of the tasks.

[veritasliberabitvos]

Change algo to only count to sqrt the number, that is the highest factor. Save that to a variable for the check on the for loop. The compiler should optimise it, just double check.

[urparvezali]

why not run cargo with --release flag?

On my machine in debug mode it takes 2 seconds and in release mode it ran about 0.8 seconed. on the other hand C++ in -Ofast flag takes 0.851 second which is little slower than rust.

[LithiumDeuteride-]

The C++ code turned out to be cumbersome, it must be done in C, the printf function is simpler.

[andreasalvi]

What the hell kind of comparison are you making? Python is an interpreted language, while Rust and C++ are compiled languages!

[ukrainian-playlists]

Hi! Enable multithreading in Python 3.13 and do a speed comparison Python 3.12 vs Python 3.13.

[tickshot]

Yup python takes least human time. Python is most performant.

[rsalmei]

Nice, but you've lost the great opportunity of running Rust and C++ in release mode afterward, with all optimizations enabled, and actually comparing the speed of both compiled languages in this case.

[julyort]

rust without iterators and debug mode :(

[IorPerry]

I heard on the grapevine that pypy is faster, that its speed is comparable with c++

[babananick]

I just tried to do this in Kotlin for fun and I got...

"Found 9592 primes in 0.841438700 seconds".

Can anyone tell me why so? I did similar tests with Java/Kotlin/C++ about a year ago and found that in some cases C++ is even slower than Java or Kotlin. Is the speed of low-level languages ​​a conspiracy theory?

[leotravel]

What a joke of a video, I thought they were about to compare the execution speed, who the f cares about this

[UltimatusVirsus]

Man, i really hate the FAKE KEYBOARD SOUND, use instead some music idk but man, that sound is awful cringe