micro-optimization

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How to test what method implementation runs faster

While the question check if input is type of string has b开发者_Python百科een closed two of the answers spiked a micro-optimization question in my mind: which of the below two solutions would perform[详细]

2023-01-08 19:25 分类：问答
One instruction to clear PF (Parity Flag) -- get odd number of bits in result register

In x86 开发者_如何学JAVAassembly, is it possible to clear the Parity Flag in one and only one instruction, working under any initial register configuration?[详细]

2023-01-07 18:07 分类：问答
Java: micro-optimizing array manipulation

I am trying to make a Java port of a simple feed-forward neural network. This obviously involves lots of numeric calculations, so I am trying to optimize my central loop as much as possible. The resul[详细]

2023-01-03 03:42 分类：问答
Optimizing big import in php

I have a simple importer, it goes through each line of a rather big csv and imports it to the database.[详细]

2023-01-01 23:55 分类：问答
C++ Adding 2 arrays together quickly

Given the arr开发者_StackOverfloways: int canvas[10][10]; int addon[10][10]; Where all the values range from 0 - 100, what is the fastest way in C++ to add those two arrays so each cell in canvas e[详细]

2023-01-01 18:33 分类：问答
Why does n++ execute faster than n=n+1?

In C language, Why does n+开发者_运维知识库+ execute faster than n=n+1? (int n=...;n++;) (int n=...;n=n+1;)[详细]

2022-12-31 19:54 分类：问答
How to do inline assembly in C++ (Visual Studio 2010)

I\'m writing a performance-critical, number-crunching C++ project where 70% of the time is used by the 200 line core module.[详细]

2022-12-30 22:50 分类：问答
Most Efficient way to set Register to 1 or (-1) on original 8086

I am taking an assembly course now, and the guy who checks our home assignments is a very pedantic old-school optimization freak. For example he deducts 10% if he sees开发者_运维百科:[详细]

2022-12-30 17:51 分类：问答
time required in java

i would like to know how much time is required to execute the conditional loops individually. Like if i had an option to use \"if else\", \"while\",\"for\", or \"foreach\" loop then which loop would g[详细]

2022-12-29 09:58 分类：问答
Function-Local Static Const variable Initialization semantics

The questions are in bold, for those that cannot be bothered reading a question in depth. This is a followup to this question. It is to do with the initialization semantics of static variables in fun[详细]

2022-12-27 03:40 分类：问答