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How can I store my users' passwords safely?
...usually stored together with the password hash" any additional storage and CPU requirements for a per-user salt are so microscopic, that they need not even be mentioned...)
– Inshallah
Mar 27 '10 at 21:55
...
Does anyone have benchmarks (code & results) comparing performance of Android apps written in Xamari
...droid nativly comes with multipe forms to execute code in:
RenderScript (CPU and GPU)
Java (SDK)
C++ (NDK)
OpenGL (GPU)
It is quite obvious that when executing code the more native the solution the faster it will be. A run-time based language will never beat a language that directly runs on the ...
How does Go compile so quickly?
...sform the text into binary.
The Go compiler targets only a small number of CPU architectures, while the GCC compiler targets a large number of CPUs
Compilers which were designed with the goal of high compilation speed, such as Jikes, are fast. On a 2GHz CPU, Jikes can compile 20000+ lines of Java co...
Difference between wait() and sleep()
...
@Geek - why in the world do you say wait() wastes CPU cycles?
– Robert Munteanu
Jun 24 '09 at 7:04
26
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Under what circumstances are linked lists useful?
...retty fast, because the array is filled sequentially (plays very nice with CPU cache).
Not to mention that a chaining hash table is expensive in terms of memory - and this "trick" cuts "pointer sizes" in half on x64.
Essentially, many linked lists are stored in an array. (one for each bucket used...
What are the pros and cons of performing calculations in sql vs. in your application
...tatements to avoid unnecessary data access)
don't push the database to its CPU limits with complex, concurrent calculations (in favour of pulling data into application memory and performing calculations there)
In my experience, with a decent DBA and some decent knowledge about your decent database...
How are everyday machines programmed?
...have 8 or 16 pins on the chip - compared to scores of pins in your regular CPU socket.
So the workflow is write some code (say, in C), compile it on your desktop machine. That compiler generates machine code for the embedded chip. Then that code is loaded onto the microprocessor (and you need speci...
What is data oriented design?
...rformance. This will only increase in importance as the difference between CPU and RAM speed widens.
How to layout the memory
In my ball example I simplified the issue a lot, because usually for any normal app you will likely access multiple variables together. E.g. position and radius will probab...
Can I use view pager with views (not with fragments)
....getView(context, collection);
break;
case 2:
view = CpuView.getView(context, collection);
break;
}
collection.addView(view);
return view;
}
@Override
public int getCount() {
return 3;
}
@Override
public boolean isViewFromObject(View view,...
Why is unsigned integer overflow defined behavior but signed integer overflow isn't?
...t used. C implementations usually used the same representation used by the CPU - so the overflow behavior followed from the integer representation used by the CPU.
In practice, it is only the representations for signed values that may differ according to the implementation: one's complement, two's c...