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Why does GCC generate such radically different assembly for nearly the same C code?
...different flavors of x86 if that is the native compiler you use, 32 bit vs 64 bit, etc? And then llvm (clang) for different targets?
Mystical has done an excellent job in the thought process required to work through the problem of analyzing/optimizing the code, expecting a compiler to come up with...
Android: Background Image Size (in Pixel) which Support All Devices
...ces/screens_support.html
xxxhdpi: 1280x1920 px
xxhdpi: 960x1600 px
xhdpi: 640x960 px
hdpi: 480x800 px
mdpi: 320x480 px
ldpi: 240x320 px
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What Every Programmer Should Know About Memory?
...FAIK, all the arch-independent stuff still applies generally, e.g. to AArch64 / ARM32.
See also the Latency Bound Platforms section of this answer for important details about the effect of memory/L3 latency on single-threaded bandwidth: bandwidth <= max_concurrency / latency, and this is actuall...
How do you run CMD.exe under the Local System Account?
...
I just tried on Vista x64 and got "The PsExec service running on ... is an incompatible version." Tried direct from \\live.sysinternals.com\tools\psexec and latest binary. There doesn't seem to be x64 version
– ZXX
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Pry: show me the stack
...ay the callstack (with show-stack), and so on:
see here:
Frame number: 0/64
From: /Users/johnmair/ruby/rails_projects/personal_site/app/controllers/posts_controller.rb @ line 7 PostsController#index:
5: def index
6: @posts = Post.all
=> 7: binding.pry
8: end
[1] pry(#<Pos...
Best way in asp.net to force https for an entire site?
...Startup.cs
app.UseHpkp(options => options
.Sha256Pins(
"Base64 encoded SHA-256 hash of your first certificate e.g. cUPcTAZWKaASuYWhhneDttWpY3oBAkE3h2+soZS7sWs=",
"Base64 encoded SHA-256 hash of your second backup certificate e.g. M8HztCzM3elUxkcjR2S5P4hhyBNf6lHkmjAHKhpGPWE=")
...
Is Java really slow?
...
nosnos
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How to send password securely over HTTP?
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The resulting string is encoded using
the RFC2045-MIME variant of Base64, except not limited to 76
char/line.
The authorization method and a space i.e. "Basic " is then
put before the encoded string.
source: Wikipedia: Authorization header
It might seem a bit complicated, but...
'float' vs. 'double' precision
...n't doubles
have 14 significant figures?
The encoding of a double uses 64 bits (1 bit for the sign, 11 bits for the exponent, 52 explicit significant bits and one implicit bit), which is double the number of bits used to represent a float (32 bits).
...
Difference between Visual Basic 6.0 and VBA
...ote that this is outdated. VBA has been updated to VBA 7, with support for 64-bits data types (LongLong, LongPtr) and more changes. VB is stuck at version 6, so it doesn't support these new features. This answer discusses more changes. In short, there are now things VB can't do, but VBA can.
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