micro-optimization

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On improving Haskell's performance compared to C in fibonacci micro-benchmark

I came across this question, which compared the performance of various compilers on computing fibonaci numbers the naive way.[详细]

2023-03-20 14:01 分类：问答
Performance / Space implications when ordering SQL Server columns?

Are there any considerations that should be taken into account when designing a new table with regards to the order in which columns should be declared? I tend to put the primary key first, followed b[详细]

2023-03-20 01:43 分类：问答
Extreme optimization of integer binary search

I\'m writing a program which will need to do a very large number of binary searches—at least 1015—in a tight loop.These together with a small number of bitwise operations will make up over[详细]

2023-03-19 04:16 分类：问答
Final variables in onDraw() method

I have a class that extends View and overrides the onDraw(Canvas canvas) method. This view runs animations, so onDraw will be called many times per second. Consider the following example...[详细]

2023-03-18 01:16 分类：问答
Is it faster to access final local variables than class variables in Java?

I\'ve been looking at at some of the java primitive collections (trove, fastutil, hppc) and I\'ve noticed a pattern that class variables are sometimes declared as final local variables. For example:[详细]

2023-03-18 00:56 分类：问答
Does it make a difference if I put a bunch code inside a single php tag vs breaking it up?

Besides personal preference, does it make any difference? <?php $meta = get_post_meta开发者_C百科(get_the_ID(), \'rw_strNum\', true);[详细]

2023-03-16 21:15 分类：问答
Is there any performance difference between the following two cases?

is there any performance difference between the following two cases: First: int test_some_condition(void);[详细]

2023-03-16 08:35 分类：问答
Which is the best way, in C, to see if a number is divisible by another?

Which is the best way, in C, to see if a number is divisible by another? I use this: if (!(a % x)) { // this will be executed if a is divisible by x[详细]

2023-03-08 04:39 分类：问答
Fast search and replace some nibble in int [c; microoptimisation]

This is variant of Fast search of some nibbles in two ints at same offset (C, microoptimisation) question with different task:[详细]

2023-03-06 12:11 分类：问答
How expensive it is to cast from int to short in Java

In terms of runtime performance, how expensive it is to cast int to short in Java? There may be thousands of such c开发者_JS百科asting, hence I wonder if it would impact the performance or not. Thanks[详细]

2023-03-05 18:10 分类：问答