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Recent questions tagged optimization

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optimization - Most optimized way to calculate modulus in C

I have minimize cost of calculating modulus in C. say I have a number x and n is the number which will ... n == 65521 to calculate modulus. See Question&Answers more detail:os...

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

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optimization - How to Calculate single-vector Dot Product using SSE intrinsic functions in C

I am trying to multiply two vectors together where each element of one vector is multiplied by the element in the same ... 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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optimization - Do Images Load Faster in HTML or CSS?

If I load an image using this html on my sidebar <img src="http://fc06.deviantart.net/fs70/f/2012/099/d/f/ ... width="200px" alt="image" /> See Question&Answers more detail:os...

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

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optimization - Can GHC really never inline map, scanl, foldr, etc.?

I've noticed the GHC manual says "for a self-recursive function, the loop breaker can only be the ... s simultaneously fast and elegant? See Question&Answers more detail:os...

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

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optimization - How do I profile and optimize an XSLT?

I have an XSLT for viewing XML files in the browser. The XSLT is naively written and currently takes a ... apply the XSLT application side?) See Question&Answers more detail:os...

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

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539 views

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optimization - How to optimize for integer parameters (and other discontinuous parameter space) in R?

How does one optimize if the parameter space is only integers (or is otherwise discontinuous)? Using an integer check in optim ... (c(-2,1), fr) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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549 views

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optimization - C++ cache aware programming

is there a way in C++ to determine the CPU's cache size? i have an algorithm that processes a ... /multicore data processing)? Thanks! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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363 views

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optimization - Most Efficient Multipage RequireJS and Almond setup

I have multiple pages on a site using RequireJS, and most pages have unique functionality. All of them share a host ... way to carry this out. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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386 views

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optimization - What can I do to increase the performance of a Lua program?

I asked a question about Lua perfromance, and on of the responses asked: Have you studied general tips for ... per answer would be ideal. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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optimization - constrOptim in R - init val is not in the interior of the feasible region error

I am trying to use constrOptim package. Here is my set up: test_func <- function(x){ return((x%*%x)[1,1]) } ... 5,] 0.0000000 What am I missing? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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540 views

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optimization - R lpsolve binary find all possible solutions

I have a linear programming problem. All variables are binary and I want to get all possible solutions.I know that I ... TRUE, num.bin.solns=6) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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588 views

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optimization - three.js: how to control rendering order

Am using three.js How can I control the rendering order? Let's say I have three plane geometries, and ... of their spatial position. thanks See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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584 views

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optimization - Is it possible to guarantee code doing memory writes is not optimized away in C++?

C++ compilers are allowed to optimize away writes into memory: { //all this code can be eliminated char buffer[ ... ) compliant to C++ Standard? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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572 views

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optimization - 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 ... why they are declared final. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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373 views

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optimization - Python: speeding up geographic comparison

I've written some code that includes a nested loop where the inner loop is executed about 1.5 million ... to improve my haversine function? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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508 views

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optimization - page load time with Jquery

I want to calculate the page load time; This means from second 0 (a little jquery snippet was loaded) to second ... need a js solution thanks :) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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374 views

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optimization - What is this asm style "x | 0" some javascript programmers are now using?

I've seen some performance critical javascript code, like the one on this project that makes extensive use of ... works would be appretiated. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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520 views

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optimization - How Do You Profile & Optimize CUDA Kernels?

I am somewhat familiar with the CUDA visual profiler and the occupancy spreadsheet, although I am probably not ... CUDA kernels perform faster? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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474 views

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optimization - Why is Javascript's Math.floor the slowest way to calculate floor in Javascript?

I'm generally not a fan of microbenchmarks. But this one has a very interesting result. http://ernestdelgado.com/ ... any reason to use it? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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403 views

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optimization - Specifying size of enum type in C

Already read through this related question, but was looking for something a little more specific. Is there a ... int-sized value regardless? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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615 views

1 answer

optimization - What is the smallest possible valid PDF?

Out of simple curiosity, having seen the smallest GIF, what is the smallest possible valid PDF file? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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386 views

1 answer

optimization - How to determine which classes are used by a Java program?

Is there any tool that lists which and when some classes are effectively used by an app or, even-better, ... are both referenced and used? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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588 views

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optimization - JavaScript: document.getElementById slow performance?

I repetitively use document.getElementById a lot on common CSS elements. Would there be a significant performance gain if I ... = "none" ... See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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375 views

1 answer

optimization - Java: How to check for null pointers efficiently

There are some patterns for checking whether a parameter to a method has been given a null value. First, the classic ... do you prefer, and why? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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420 views

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optimization - -static option for gcc?

I'm wondering what the -static option on gcc does. I need this option when compiling a certain application, however when I ... 4.6.1-9) (GCC) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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472 views

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optimization - Why is a CPU branch instruction slow?

Since I started programming, I have read in every place to avoid wasteful branches at all costs. That's ... other instructions (like addition)? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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539 views

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optimization - Fastest way to loop through a 2d array?

I just stumbled upon this blog post. The author shows two code samples that loop through a rectangle and compute ... that one to me? Thanks. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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446 views

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optimization - Why is ''.join() faster than += in Python?

I'm able to find a bevy of information online (on Stack Overflow and otherwise) about how it's a ... to other Python concatenation methods? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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