Stack Exchange

Eric Postpischil

edp.org

Senior software engineer in Apple’s Vector and Numerics Group.

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Top Questions
Top Answers
46
Why does gcc allow arguments to be passed to a function defined to be with no arguments?
stackoverflow.com

27
Why are standard string functions faster than my custom string functions?
stackoverflow.com

18
Can a near-zero floating value cause a divide-by-zero error?
stackoverflow.com

17
Why doesn't a compiler optimize floating-point *2 into an exponent increment?
stackoverflow.com

14
Is fast implementation of pow(x, 0.5f) faster than fast sqrt(x)?
stackoverflow.com

14
JVM lack of support for NaN vs scala Double.NaN
stackoverflow.com

14
Naive C++ Matrix Multiplication 100 times slower than BLAS?
codereview.stackexchange.com

12
new operator unable to allocate memory
stackoverflow.com

10
conversion from double to unsigned int
stackoverflow.com

10
How much cycles math functions take on modern processors
stackoverflow.com

10
What's the difference between “hello” and {“hello”}?
stackoverflow.com

10
What is this “denormal data” about ? - C++
stackoverflow.com

10
Function pointer equality in C
stackoverflow.com

10
want to understand a C array behaviour
stackoverflow.com

10
Increment in both side in C
stackoverflow.com

9
efficiency of pow(num,2)?
stackoverflow.com

9
why the char comparison “if(c>='a' && c<='z')” is not portable?
stackoverflow.com

8
C++: Pointer Arithmetic
stackoverflow.com

8
What is the probability that the array will remain the same?
stackoverflow.com

8
Sine computation inconsistency in Visual C++ 2012?
stackoverflow.com

8
What are the cases in which arrays decay to pointers?
stackoverflow.com

8
Floating point comparison revisited
stackoverflow.com

8
Do I get a performance bonus if I try to use arm math assembler commands instead of c
stackoverflow.com

8
Width of int64_t, is it always 64 bits?
stackoverflow.com

7
(Why) is using an uninitialized variable undefined behavior in C?
stackoverflow.com

7
Why does GLSL's arithmetic functions yield so different results on the iPad than on the simulator?
stackoverflow.com

7
Code or compiler: optimizing a IIR filter in C for the iPhone 4 and later
stackoverflow.com

7
Saving code space by altering a function call in C
stackoverflow.com

7
Will the two lines intersect in a Cartesian plane
stackoverflow.com

7
How can I compile and run this 1989 written C program?
stackoverflow.com

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