micro-optimization

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_mm256_fmadd_ps is slower than _mm256_mul_ps + _mm256_add_ps?
user_14226240
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2
1
1220
avx micro-optimization simd sse gcc
Why does a high percentage of identical input data reduce performance?
user_83115670
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2
0
83
branch-prediction micro-optimization optimization
Why does does a NOP (as a 5th uop) speed up a 4 uop loop on Ice Lake?
user_113221310
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10
0
281
x86-64 micro-optimization assembly cpu-architecture
Avoiding self-modifying code (SMC) machine clears when writing to executable memory
user_85280140
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2
0
146
self-modifying jit micro-optimization x86 assembly
branch vs memory access - what is generally more preferred in AArch64 mode?
user_26537750
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2
0
88
arm64 micro-optimization assembly
Inconsistent `perf annotate` memory load/store time reporting
user_4853430
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2
1
149
perf x86-64 micro-optimization assembly performance
ADD slower than ADC in the first step of a bigint multiply on Coffee Lake (Skylake)
user_8992550
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12
0
262
micro-optimization x86 assembly cpu-architecture performance
Why does some Windows booloader code zero registers with `sub` instead of `xor`?
user_150479740
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2
2
109
zero-initialization micro-optimization x86 assembly
How fast is accessing a struct member in C?
Admin1
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6
3
722
micro-optimization struct c performance
Optimizing this "coincidence search" algorithm, for speed
user_140731820
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4
1
107
micro-optimization optimization algorithm c++ performance
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