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New posts in micro-optimization
Speed up large modular multiplication in base 2^8 without multiplier
Jun 29, 2022
assembly
multiplication
micro-optimization
riscv
modular-arithmetic
Is it faster to prepend to a string with substr?
Jun 22, 2022
perl
benchmarking
substr
micro-optimization
What is the fastest way to subtract two arrays in scala
Oct 02, 2021
scala
micro-optimization
scala-2.9
Should one use `if ($a != NULL)` or `if ($a !== NULL)` to control program flow?
Oct 13, 2020
php
performance
if-statement
micro-optimization
program-flow
Why does .NET Native compile loop in reverse order?
Sep 11, 2022
c#
assembly
x86
micro-optimization
.net-native
GEMM kernel implemented using AVX2 is faster than AVX2/FMA on a Zen 2 CPU
May 11, 2022
assembly
matrix-multiplication
simd
avx
micro-optimization
How do I optimize a loop which can be fully strict
Sep 22, 2022
performance
haskell
micro-optimization
Threshold an absolute value
Sep 14, 2022
c++
c
language-lawyer
undefined-behavior
micro-optimization
Why is strtolower slightly slower than strtoupper?
Feb 28, 2022
php
c
performance
micro-optimization
java micro-optimization: combine set of boolean instance variables to bit vector based on int
Feb 01, 2022
java
boolean
micro-optimization
bitvector
In Java, should Integer object be preferred over int primitive (same for other numeric types)?
Nov 12, 2022
java
performance
micro-optimization
C++ fixed size arrays vs multiple objects of same type
Aug 16, 2022
c++
c
micro-optimization
is i=(i+1)&3 faster than i=(i+1)%4
May 15, 2022
c++
micro-optimization
What is faster in Python, "while" or "for xrange"
Feb 09, 2022
python
micro-optimization
Is x >= 0 more efficient than x > -1?
Nov 06, 2022
c++
optimization
micro-optimization
How to improve performance on a function that operates on two arrays in clojure
Jun 10, 2021
clojure
micro-optimization
mathematical-optimization
Why move 32-bit register to stack then from stack to xmm register?
May 28, 2020
assembly
x86
sse
att
micro-optimization
Weird performance effects from nearby dependent stores in a pointer-chasing loop on IvyBridge. Adding an extra load speeds it up?
Jun 21, 2021
assembly
x86
micro-optimization
microbenchmark
micro-architecture
Ever any performance different between Java >> and >>> right shift operators?
Nov 15, 2022
java
performance
bit-shift
micro-optimization
Why does the compiler not always optimize away local variables?
Sep 22, 2022
c++
gcc
compiler-optimization
micro-optimization
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