60
votes
3
answers
2.7K
views
Possible GCC bug when returning struct from a function
I believe I found a bug in GCC while implementing O'Neill's PCG PRNG. (Initial code on Godbolt'
50
votes
3
answers
1.8K
views
Why does GCC generate such radically different assembly for nearly the same C code?
While writing an optimized ftol function I found some very odd behaviour in GCC 4.6.1. Let me show you the cod
58
votes
16
answers
655
views
Is it possible to "decompile" a Windows .exe? Or at least view the Assembly?
A friend of mine downloaded some malware from Facebook, and I'm curious to see what it does without infec
63
votes
5
answers
1.7K
views
Why does Java switch on contiguous ints appear to run faster with added cases?
I am working on some Java code which needs to be highly optimized as it will run in hot functions that are inv
64
votes
11
answers
1.9K
views
Replacing a 32-bit loop counter with 64-bit introduces crazy performance deviations with _mm_popcnt_u64 on Intel CPUs
I was looking for the fastest way to popcount large arrays of data. I encountered a very weird effect: Changin
58
votes
12
answers
931
views
Why doesn't GCC optimize a*a*a*a*a*a to (a*a*a)*(a*a*a)?
I am doing some numerical optimization on a scientific application. One thing I noticed is that GCC will optim
52
votes
3
answers
1.2K
views
Why does Python's hash of infinity have the digits of π?
The hash of infinity in Python has digits matching pi: >>> inf = float('inf') >>>
48
votes
19
answers
456
views
Mapping two integers to one, in a unique and deterministic way
Imagine two positive integers A and B. I want to combine these two into a single integer C. There can be no
57
votes
6
answers
2.2K
views
How do I determine whether my calculation of pi is accurate?
I was trying various methods to implement a program that gives the digits of pi sequentially. I tried the Tayl
58
votes
9
answers
1.9K
views
How to state in requirements.txt a direct github source
I've installed a library using the command pip install git+git://github.com/mozilla/elasticutils.git whi
55
votes
12
answers
844
views
How to git-cherry-pick only changes to certain files?
If I want to merge into a Git branch the changes made only to some of the files changed in a particular commit
57
votes
13
answers
1.3K
views
Error "The input device is not a TTY"
I am running the following command from my Jenkinsfile. However, I get the error "The input device is not a TT
54
votes
9
answers
2.1K
views
How to force Docker for a clean build of an image
I have build a Docker image from a Docker file using the below command. $ docker build -t u12_core -f u12_cor
61
votes
11
answers
519
views
Installing specific package versions with pip
I'm trying to install version 1.2.2 of the MySQL_python adaptor, using a fresh virtualenv created with th
53
votes
12
answers
1.3K
views
What does cherry-picking a commit with Git mean?
Recently, I have been asked to cherry-pick a commit. So what does cherry-picking a commit in git mean? How d
61
votes
2
answers
2.7K
views
Testing NativeScript app with Appium
I am learning NativeScript. I am trying to write some automated tests with Jasmine. From my understanding, I c
62
votes
6
answers
2.3K
views
How to set the DPI of Java Swing apps on Windows/Linux?
If you have an monitor with a DPI over 150 (such as Macbook Pro), you may also find the problem: the font on t
52
votes
9
answers
746
views
Openstreetmap: embedding map in webpage (like Google Maps)
Is there a way to embed/mashup the OpenStreetMap in your page (like the way Google Maps API works)? I need to
60
votes
4
answers
407
views
How to interpret API documentation function parameters?
Is there a standard to interpret the syntax of function interfaces in API documentations and if yes, how is it
61
votes
3
answers
1.3K
views
Reading header data in Ruby on Rails
I am making an API where in the access token for Facebook login will be sent in through header data. How do I
