111–120 of 129 posts
File " ", line 2 return f'{fname} {surname} is {age}.' ^ SyntaxError: invalid syntax So this is a subset of Python or something like that?
I believe this feature was introduced in Python 3.6. This implementation may be 3.6 Edit: Just checked the site and see it uses PyPy which states -- on their site -- the python version is 3.5.3
The speed is surprisingly reasonable. Testing with a simple loop, I get about 1.3-1.4 million loops per second in python3, 2 million loops per second in python2, 14.5 million loops in pypy, and 0.61 million loops in the browser. My code basically calls int(time.time()) until its value changes, doing i+=1 for every time it did not change (n=10 for every platform (python2/3/pypy/browser)). My browser is Firefox 61, ful…
There's some pypy.js vs cpython benchmarks at http://arewepythonyet.com/ - those look very good as well.
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I wonder if the time.time is the slow part there? Maybe worth doing a busy look for say 5 million iterations, timing that then doing the calculation for loops per second.
I'm sure it is a thousand times slower than i++, but it should be the same code on each platform. But you made me think: indeed, the underlying call could be slower from JS whereas from pypy/python{2,3} it's fast (or vice versa). So I just tested a version where it checks how long ten million iterations take (n=3). Code here: https://hastebin.com/uyuhecabek.py browser/pypy 5.25 seconds python 3.6.6 2.16 seconds pytho…
Iteration 0 took -0.9660000801086426s
Iteration 1 took -0.9519999027252197s
Iteration 2 took -0.9499998092651367s
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I'm sure it is a thousand times slower than i++, but it should be the same code on each platform. But you made me think: indeed, the underlying call could be slower from JS whereas from pypy/python{2,3} it's fast (or vice versa). So I just tested a version where it checks how long ten million iterations take (n=3). Code here: https://hastebin.com/uyuhecabek.py browser/pypy 5.25 seconds python 3.6.6 2.16 seconds pytho…
Tested on Brython (with Firefox) - http://www.brython.info/tests/editor.html?lang=en Iteration 0 took -0.9660000801086426s Iteration 1 took -0.9519999027252197s Iteration 2 took -0.9499998092651367s It is about 10 times slower with Chrome on my computer.
Iteration 0 took 0.6579999923706055s
Iteration 1 took 0.6540000438690186s
Iteration 2 took 0.6460001468658447s
Running it on OP's website again just to be sure, it now takes 4.9 seconds instead of 5.25, so there is some variance there, but this is still a big difference. This is Firefox as well (see another comment in this subthread), I don't have Chromium installed.
The speed is surprisingly reasonable. Testing with a simple loop, I get about 1.3-1.4 million loops per second in python3, 2 million loops per second in python2, 14.5 million loops in pypy, and 0.61 million loops in the browser. My code basically calls int(time.time()) until its value changes, doing i+=1 for every time it did not change (n=10 for every platform (python2/3/pypy/browser)). My browser is Firefox 61, ful…
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Refe...
The speed is surprisingly reasonable. Testing with a simple loop, I get about 1.3-1.4 million loops per second in python3, 2 million loops per second in python2, 14.5 million loops in pypy, and 0.61 million loops in the browser. My code basically calls int(time.time()) until its value changes, doing i+=1 for every time it did not change (n=10 for every platform (python2/3/pypy/browser)). My browser is Firefox 61, ful…
Fetching time in the browser isn't accurate because a lot of trackers exploit timing in order to fingerprint users. A lot of browsers now purposefully reduce the precision of the clock. See: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Refe... https://johnresig.com/blog/accuracy-of-javascript-time/
It's really awesome to see how far this has come. I believe we at Repl.it were the first to try something like this in production. We emscriptined CPython to JavaScript and contributed quite a bit to the project in the process (including the initial virtual filesystem implementation). https://github.com/replit-archive/empythoned I deployed this at scale at Codecademy were millions of users were using it to learn Pyth…
I just wanted to say how much I love Repl.it and use it all the time. I use it as a testing scratchpad mostly but I know it's much powerful than that. I appreciate its simplicity. Thanks for a great product!
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I wonder if the time.time is the slow part there? Maybe worth doing a busy look for say 5 million iterations, timing that then doing the calculation for loops per second.
I'm sure it is a thousand times slower than i++, but it should be the same code on each platform. But you made me think: indeed, the underlying call could be slower from JS whereas from pypy/python{2,3} it's fast (or vice versa). So I just tested a version where it checks how long ten million iterations take (n=3). Code here: https://hastebin.com/uyuhecabek.py browser/pypy 5.25 seconds python 3.6.6 2.16 seconds pytho…
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You would use sum(range()) in a Python though. Remember that many things you do manually in JS have a better, automatic and faster way in the stlib. Besides, if calculations are important, you would use numpy.
Ah yes. sum(range()) in Python vs for(i=1...) in js was much closer, about 20% quicker in javascript.