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Replacing a 32-bit loop counter with 64-bit introduces crazy performance deviations with _mm_popcnt_
...it's hard to read if I put results in comment.
I get these results with a Mac Pro (Westmere 6-Cores Xeon 3.33 GHz). I compiled it with clang -O3 -msse4 -lstdc++ a.cpp -o a (-O2 get same result).
clang with uint64_t size=atol(argv[1])<<20;
unsigned 41950110000 0.811198 sec 12.9263 GB/...
What are the calling conventions for UNIX & Linux system calls (and user-space functions) on i386 an
...default-calling-convention
x86-64 Linux System Call convention:
x86-64 Mac OS X is similar but different. TODO: check what *BSD does.
Refer to section: "A.2 AMD64 Linux Kernel Conventions" of System V Application Binary Interface AMD64 Architecture Processor Supplement. The latest versions of...
Is MATLAB OOP slow or am I doing something wrong?
...picture has changed enough to update this.
Arch: PCWIN Release: 2011b
Machine: R2011b, Windows XP, 8x Core i7-2600 @ 3.40GHz, 3 GB RAM, NVIDIA NVS 300
Doing each operation 100000 times
style total µsec per call
nop() function: 0.01578 0.16
n...
How to get started with developing Internet Explorer extensions?
... BHO
{
RegistryKey registryKey = Registry.LocalMachine.OpenSubKey(RegBHO, true);
if (registryKey == null)
registryKey = Registry.LocalMachine.CreateSubKey(RegBHO);
RegistryKey key = registryKey.OpenSubKey(guid);
...
Favicons - Best practices
...con-16x16.png" sizes="16x16">
<!-- favicon-32x32.png - For Safari on Mac OS. -->
<link rel="icon" type="image/png" href="/content/images/favicon-32x32.png" sizes="32x32">
<!-- Android/Chrome -->
<!-- manifest-json - The location of the browser configuration file. It contains...
Git-Based Source Control in the Enterprise: Suggested Tools and Practices?
...f the Linux developers are using CLI git client, without any problem. Some Mac developers are successfully using
How to add a browser tab icon (favicon) for a website?
...con-16x16.png" sizes="16x16">
<!-- favicon-32x32.png - For Safari on Mac OS. -->
<link rel="icon" type="image/png" href="/content/images/favicon-32x32.png" sizes="32x32">
<!-- Android/Chrome -->
<!-- manifest-json - The location of the browser configuration file. It contains...
How do I clone a subdirectory only of a Git repository?
...-boilerplate/tree/master/src right into /etc/nginx
– mac
Apr 10 '14 at 5:40
25
@Chronial, @ErikE:...
How to profile a bash shell script slow startup?
...saves you from spawning an external executable for every line and works on Macs or elsewhere that doesn't have GNU date - as long as you have Bash 5, of course. Change the setting of PS4:
PS4='+ $EPOCHREALTIME\011 '
As pointed out by @pawamoy, you can use BASH_XTRACEFD to send the output of the t...
Cartesian product of x and y array points into single array of 2D points
...er of alternatives. All the tests shown here were performed on a quad-core machine, running Mac OS 10.12.5, Python 3.6.1, and numpy 1.12.1. Variations on hardware and software are known to produce different results, so YMMV. Run these tests for yourself to be sure!
Definitions:
import numpy
impor...