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Jan Achrenius
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Unbuckle your seat belts, we're go for launch!
The legendary crash simulator is now on Google Play!Perform death-defying m...
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Been doing this version since July...
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Jan Achrenius

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I implemented a nontrivial algorithm in Apple's Swift, and the performance was miserable. Then I started digging deeper, and noticed that something as simple as sorting an array of integers can be surprisingly slow in Swift.

Here are some benchmarks that compare Swift, pure Python, and C++. I am just sorting an array with 1 million random integers, using the "sort" function from the standard library:

— C++ -O3: 0.06 s
— C++ -O0: 0.06 s
— Python: 0.6 s
– Swift -O3: 6 s
– Swift -O0: 88 s.

Both the C++ compiler (clang++) and the Swift compiler were from Apple's Xcode 6 beta.

Seriously, what is wrong here? Of course I am a total beginner with Swift, but I do not see much room for user errors here: "let y = sort(x)", where x is a million-element array of type "Int[]".

#swift   #notsoswift  
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Jan Achrenius

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Motörhead x Finnish rautalanka
 
From the deep core of the Finnish culture comes this. 
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I've been watching you, a lalalala int32, a lalalala int64 LE int128, come on, a lalalala int32, a lalalala int64 LE int128, hey-a.

(inspired by +Jari Komppa)
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Pay what you want.
 
This week’s Humble Weekly Sale features Rochard from Recoil Games! Name your price and get Rochard and Rochard: Hard Times DRM-free and on Steam for Windows, Mac, and Linux, plus the Rochard digital art book and original soundtrack!

http://www.humblebundle.com/weekly

Check out the site for more details!
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Finnish country. We have no cowboys, just coders.
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And plenty of cowboy coders :D
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Have him in circles
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Jan Achrenius

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Stop this madness.
 
Stop the rockets, but lift the siege. The Israelis must seek a sovereign state for Palestinians http://econ.st/Uxfpc2
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Can't stop the rock. Take control of an energetic, running, jumping, swingi...
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Jan Achrenius

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Nice. And nice to see you're still going strong, Nick.

Jan Achrenius

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"Using historical production data, we calculate that global nuclear power has prevented an average of 1.84 million air pollution-related deaths and 64 gigatonnes of CO2-equivalent (GtCO2-eq) greenhouse gas (GHG) emissions that would have resulted from fossil fuel burning. On the basis of global projection data that take into account the effects of the Fukushima accident, we find that nuclear power could additionally prevent an average of 420 000–7.04 million deaths and 80–240 GtCO2-eq emissions due to fossil fuels by midcentury, depending on which fuel it replaces."
A; Accounts of Chemical Research · ACS Applied Materials & Interfaces · ACS Catalysis · ACS Chemical Biology · ACS Chemical Neuroscience · ACS Combinatorial Science · - Journal of Combinatorial Chemistry · ACS Macro Letters · ACS Medicinal Chemistry Letters · ACS Nano · ACS Sustainable Chemistry ...
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Have him in circles
171 people
Aki Järvilehto's profile photo
Mikko Karvonen's profile photo
Toni Lönnberg's profile photo
Jenni Häyrinen's profile photo
Janne Hietamäki's profile photo
Pertti Kainulainen's profile photo
Recoil Games's profile photo
Saku Lehtinen's profile photo
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