Recent questions tagged Performance

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performance - How efficient is Python's max function

The function max() which returns the maximum element from a list . . . what is its running time (in Python 3) in terms of Big O notation? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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performance - In what circumstances can large pages produce a speedup?

Modern x86 CPUs have the ability to support larger page sizes than the legacy 4K (ie 2MB or 4MB), and ... a benefit in less exotic scenarios. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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performance - Why is Sieve of Eratosthenes more efficient than the simple "dumb" algorithm?

If you need to generate primes from 1 to N, the "dumb" way to do it would be to iterate through ... . Am I misunderstanding something here? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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performance - How to speed up / parallelize downloads of git submodules using git clone --recursive?

Cloning git repositories that have a lot submodules takes a really long time. In the following example are ~100 ... using git clone --recursive? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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689 views

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performance - How to load CSS asynchronously without using JavaScript?

Suppose if I have a website http://somethingsomething.com And I have 3 css file common.css homepage.css inner-pages ... JS way to do this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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performance - Why ASP.NET MVC default Model Binder is slow? It's taking a long time to do its work

In a current project the client asked for the possibility of answering a questionnaire in two ways: using a Wizard (one ... what it is... :) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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performance - async and await: are they bad?

We recently developed a site based on SOA but this site ended up having terrible load and ... ContentService.GetSupportedContentTypes(); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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779 views

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performance - Calculating the speed of routines?

What would be the best and most accurate way to determine how long it took to process a routine, such as ... some suggestions. Thanks. Craig. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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761 views

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performance - Efficient iteration over slice in Python

How efficient are iterations over slice operations in Python? And if a copy is inevitable with slices, is there ... over the existing list. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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performance - python operator, no operator for "not in"

This is a possibly silly question, but looking at the mapping of operators to functions I noticed that there ... and therefore execute faster. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.0k views

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performance - ListBox, VirtualizingStackPanel, and Smooth Scrolling in WPF

I have a ListBox that may have many rows of templated DB records, including an Image, bound ... VirtualizingStackPanel behavior and performance? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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613 views

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performance - Ping function makes the whole excel table slow/unresponsive

I have a function that pings computers from an excel list and gets the ping value of them. While the script was ... ] End If Next c End Sub See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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613 views

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performance - Checking if TWO SSE registers are not both zero without destroying them

I want to test if two SSE registers are not both zero without destroying them. This is the code I currently have: ... using up to SSE 4.2)? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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601 views

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performance - Good resources on how to program PEBS (Precise event based sampling) counters?

I have been trying to log all memory accesses of a program, which as I read seems to be impossible. I ... programming will be very helpful. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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781 views

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performance - Speeding up java deep copy operations

We have implemented a general purpose deep copy mechanism using serialization. import java.io.*; public class ... methods of cloning objects? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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582 views

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performance - Haskell: comparison of techniques for generating combinations

I was doing a few of the 99 Haskell Problems earlier and I thought that exercise 27 ("write a function to enumerate the ... :)) next ++ [[]]) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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779 views

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performance - Java: Concurrent reads on an InputStream

Been looking around for a little while now and I'm a bit confused on this issue. I want to be able to ... and thanks in advance, Alexei Blue. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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711 views

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performance - Java - Repeated function call reduces execution time

I have this following code public class BenchMark { public static void main(String args[]) { doLinear(); ... benchmark true execution time ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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704 views

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performance - How can I configure Sitecore so that it generates absolute links to media items?

<sc:Image> and <sc:FieldRenderer>, when rendering a MediaItem, generate html code that looks like the following: ... t seem to change anything. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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662 views

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performance - Why are (constant) expressions not evaluated at compile time in Haskell?

I am currently learning Haskell, and there is one thing that baffles me: When I build a complex expression ... and exit almost immediately. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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923 views

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performance - Fast modulo 3 or division algorithm?

is there a fast algorithm, similar to power of 2, which can be used with 3, i.e. n%3. Perhaps ... as those tend to inhibit vectorization thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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631 views

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performance - De Bruijn algorithm binary digit count 64bits C#

Im using the "De Bruijn" Algorithm to discover the number of digits in binary that a big number (up to 64bits) ... I hope this helps you too. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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811 views

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performance - Fastest way to remove all duplicates in R

I'd like to remove all items that appear more than once in a vector. Specifically, this includes character, numeric ... SO posts here and here. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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659 views

1 answer

performance - Does LLVM convert Objective-C methods to inline functions?

Does LLVM automatically convert Objective-C methods to inline functions when possible? (I.e., is it just as ... C method will be inlined? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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590 views

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performance - Assembly: Why are we bothering with registers?

I have a basic question about assembly. Why do we bother doing arithmetic operations only on registers if they can ... on the first good answer. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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852 views

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performance - Does var keyword in C# cause boxing?

My boss forbids me to use var as it would cause boxing and slowing down the app. Is that true? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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771 views

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performance - Vectorizing nested loops in matlab using bsxfun and with GPU

For loops seem to be extremely slow, so I was wondering if the nested loops in the code shown next could ... could be assumed as constants too. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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596 views

1 answer

performance - what is the best way to optimize my json on an asp.net-mvc site

i am currently using jqgrid on an asp.net mvc site and we have a pretty slow network (internal application) ... cut down on network traffic. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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