...st repeatable, we want the interactions between the threads to happen in a predictable order. We don't want to externally synchronize the threads in the test, because that will mask bugs that could happen in production where the threads are not externally synchronized. That leaves the use of timin...

...and your program working, because that's how most drivers will behave in a predictable way. – datenwolf Sep 6 '12 at 11:51 ...

..., and if code reads that struct to a variable and modifies, one can safely predict that such action will not affect the object whose property was read unless or until the struct is written back. By contrast, if the property were a mutable class type, reading it and modifying it might update the und...

.... Basically, it is possible to write C++ programs that do not behave in a predictable way, even though many C++ compilers will not report any errors in the program! Let's look at a classic example: #include <iostream> int main() { char* p = "hello!\n"; // yes I know, deprecated convers...

...tomatic optimizations by the compiler are hurt, namely inlining and branch prediction. Please see Bill K's answer for a detailed explanation. The conclusion of these points is the following: For each single property that is implemented lazily, you should have considered these points. That means, t...

...cification is a core feature of robust statistical analysis. Let's try and predict a pitcher's ERA (Earned Runs Average, a measure of performance) using the small set of covariates available in the Pitching table. How does the (linear) relationship between W (wins) and ERA vary depending on which ot...

...e overhead of conditional move is much lower than overhead of false branch prediction. – Filip Navara May 19 '12 at 9:15 add a comment  |  ...

...xtra cycles latency vs. 100, but still a throughput penalty). As Ulrich predicted, every multi-socket system is NUMA these days: integrated memory controllers are standard, i.e. there is no external Northbridge. But SMP no longer means multi-socket, because multi-core CPUs are widespread. Intel...

...ing might require, but none of this should be in any way construed to be a prediction or a guarantee of any particular feature or future direction for C#. Now, if what you want is merely an annotation on the local variable that is a parameter that says "the value of this parameter doesn't change th...

...proves performance (branching/jmp instructions are expensive if they don't predict near-perfectly) but comes with the cost of memory. The code for all the compare instructions has some size, too, so especially with 32-bit pointers or offsets, a single jump table lookup might not cost a lot more siz...