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How can I determine if a .NET assembly was built for x86 or x64?

I’ve got an arbitrary list of .NET assemblies. I need to programmatically check if each DLL was built for x86 (as opposed to ...

May 11, 2022
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What’s the purpose of the LEA instruction?

For me, it just seems like a funky MOV. What’s its purpose and when should I use it? 17 s 17

April 21, 2022
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Why does C++ code for testing the Collatz conjecture run faster than hand-written assembly?

I wrote these two solutions for Project Euler Q14, in assembly and in C++. They implement identical brute force approach for testing the ...

April 18, 2022
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Replacing a 32-bit loop counter with 64-bit introduces crazy performance deviations with _mm_popcnt_u64 on Intel CPUs

I was looking for the fastest way to popcount large arrays of data. I encountered a very weird effect: Changing the loop variable ...

April 12, 2022
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Why are elementwise additions much faster in separate loops than in a combined loop?

Suppose a1, b1, c1, and d1 point to heap memory, and my numerical code has the following core loop. const int n = ...

April 10, 2022
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