Here is a piece of C++ code that seems very peculiar. For some strange reason, sorting the data miraculously makes the code almost six times faster:
#include <algorithm>
#include <ctime>
#include <iostream>
int main()
{
// Generate data
const unsigned arraySize = 32768;
int data[arr...
I knew about branch prediction and that newer CPUs do it much more intelligently, and knew about some of that optimization stuff (particularly the loop interchange) but had no clue it was such a big deal, or that Intel's compiler is so much smarter
I'm expecting LLVM and its superior architecture to make it easier for folks to write really robust micro optimizations into LLVM's codegen, such that it rivals or beats Intel's compiler and gcc
new Intel arches don't improve general computing perf all that much these days, though
they target very specific niches that have traditionally been slow
not, you know, MS Word's business logic
I wonder, if you had the source to some big M$ programs, if you built them with ICC instead of Visual Studio, would they run noticeably faster... would be funny for M$ to not use their own toolchain to build their stuff
the only reason I've heard that ICC is insanely fast is that "Intel knows their processors better than anyone"
another way to look at that: maybe the hardware designers collude with the ICC developers and give them tips based on their experience with the actual hardware
would certainly provide an interesting perspective
gcc, llvm, etc are probably not developed with that level of insight
@allquixotic: even if they don't collude, they have a smaller set of hardware to design for (they just optimise for X generations of new processors) and probably nearly perfect documentation
Move to comment superuser.com/a/753841/98855 . Can a Mod move this to a comment more elequently than my method of posting the comment myself with the users name?
OMG SO I WAS PISSED CUZ IHAVE TO COPY FROM THE WEB THAT ENYE LETTER BUT DAYYUUMMM I FUNALLY FOUND OUT HOW TO TYPE IT BY MYSELF ....SERIOUSLY SEARCHED EVRYWHERE BUT THOSE CODES ARE USELESS ...JUST HOLD SHIFT + ~ THEN LETTER "N" ..FOR THE SMALL LETTER JUST LET GO SHIFT RIGHT BEFFOR YOU TYPE LETTER N
@Boris_yo what is that? And where do suction cups work anyways ? The bathtub, and on a window, is about the only places left that are flat non-textured. I am not saying foam tape is better , just where did they ever intend for the suction cups to work?
Facebook have culled a lot of accounts the past 24 hours
and a lot of those have been marketers who have been
using scraping software for promoting or ads.
This also includes if you have used id's in the past and
I've seen others business and personal accounts closed.
The removed accounts are also going to be sued.
@Boris_yo In my state you cant stick anything to the front window anymore (driving safety) and the side windows go up and down. especially a drivers window which can have an automated full down action, for (things like) toll booth payments, and drive-through food.
I have tried sticking things to the drivers side window like the GPS mount (because they dont allow the front window) and it is nothing but a disaster. Close the door for example is a huge impact.
@Boris_yo According to some studies, they would have to remove 95% of the accounts on facebook if they are going to get rid of things like "like" scams, and paid flourishing of the place.
They are probably doing a token cleanup, to soothe complaints. Every fake like and ever fake friending and every fake account has only made the place Virtually rich. It is percieved way greater by and of advertising and promotion.
Our data center racks in New York unexpectedly lost connectivity. There was a failure in the UPS feeding our equipment that went undetected by our provider. Here is a timeline of major events so far: 06:43 UTC - The UPS feeding our racks in the New York data center stopped feeding utility power and failed to provider backup power 07:04 UTC - We learned the nature of the UPS issue and began fai…
I almost never use protected except as a protected abstract method in an abstract class that I want other packages to implement, or a protected field that I want them to be able to access
We are currently only line and running operations from the New York data center again after the power outage earlier this morning. We are in a holding pattern since the UPS system serving both our primary and backup power feeds (yes, we’re very excited to learn this too) is still being worked on. At 11:59 UTC The decision was made to move operations back to New York and risk a few second…
I noticed that several moderators have just changed their avatars in a similar style:
Is there any backstory behind this?
Here is a piece of C++ code that seems very peculiar. For some strange reason, sorting the data miraculously makes the code almost six times faster:
#include <algorithm>
#include <ctime>
#include <iostream>
int main()
{
// Generate data
const unsigned arraySize = 32768;
int data[arr...
