Questions related to improving application performance, this can be range from selection software architecture to selection of algorithms.

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2
votes
2answers
263 views

Will using multiple recordsets in one database request be more efficient?

I am redeveloping an old ecommerce website which is currently written in C# ASP.NET 2.0. Because this is a reasonably high volume website and has suffered performance issues I want to develop in the ...
0
votes
3answers
210 views

Indirection: Readability vs Performance [closed]

(I see there are a lot of similar questions, but answers are not really what I am interested at.) The thing that is bugging me is indirection. If I'm writing something, I do tend to inline as much ...
0
votes
1answer
83 views

Mail Server Caching

I'm currently working on a web mail client. When a user logs in, I'm fetching all the mails from the INBOX from the beginning of time. As expected this is pretty darn slow. I'm planning to implement ...
3
votes
3answers
254 views

Iteratively improve software architecture & quality in an agile process?

Or to put it another way how to ensure that architecture or quality doesn't suffer, doing agile. Some of the understandings in handling architecture in agile are below(generally applies to testing as ...
0
votes
3answers
433 views

Advantage of monitoring file change using Windows API rather than manually

I developed a Windows software about an year ago. Part of it was to monitor few configuration files for manual changes by user and if any of these change restart a particular service. So, I used the ...
3
votes
1answer
688 views

Hadoop and Object Reuse, Why?

In Hadoop, objects passed to reducers are reused. This is extremely surprising and hard to track down if you're not expecting it. Furthermore, the original tracker for this "feature" doesn't offer any ...
2
votes
3answers
580 views

Is Python suitable for a statistical modeling application looking over thousands of past events?

I'm currently working on a project with a partner where we analyze large datasets of past sporting events. There are approximately 30,000 events per year and we have historical data for five years. ...
0
votes
1answer
933 views

Most efficient multiple condition IF statement

I am using a function to compare over 100 variables inside of classes to each other an am curious if one method of comparing multiple condition statements is more efficient than another. I am ...
2
votes
3answers
3k views

Super Fast File Storage Engine

I basically have one big gigantic table (about 1.000.000.000.000 records) in a database with these fields: id, block_id, record id is unique, block_id is not unique, it contains about 10k (max) ...
2
votes
1answer
812 views

How many Angular Controllers and/or Directives is too many?

I'm building a large, editable data table with angular, and I'm trying to figure out what the best practice is. The table will be a couple of hundred rows, with a couple of dozen columns, so upwards ...
0
votes
1answer
1k views

Console Application vs GUI? [closed]

I'm trying to develop a minimal MP3 player with some cool but light features. It is so simple that it doesn't matter if it is console application or not. Since my purpose is to consume the sources as ...
5
votes
7answers
9k views

How important is to initialize a variable

How important is it to initialize variables? Does proper initializing avoid memory leaks or have performance advantages?
1
vote
0answers
1k views

Best method for async initialization of view model in MVVM pattern (WPF)

I'm working on a business application (C#, WPF, EF, MVVM). I need to load a bunch of items from database, create view models for them and put them in a window. Is there a way to create the view model ...
12
votes
5answers
3k views

Why did the team at LMAX use Java and design the architecture to avoid GC at all cost?

Why did the team at LMAX design the LMAX Disruptor in Java but all their design points to minimizing GC use? If one does not want to have GC run then why use a garbage collected language? Their ...
6
votes
3answers
15k views

Quickest way to split a delimited String in Java

I am building a Comparator that provides multi-column sort capability on a delimited String. I am currently using the split method from String class as my preferred choice for splitting the raw String ...
-3
votes
2answers
6k views

Why is Javascript faster than Jquery? [closed]

I was reading a thread and saw this post, which says that Javascript is faster than Jquery because it uses native code. But why is the use of native code faster? Is this always the case? What ...
2
votes
1answer
112 views

How to know, with good performance, which areas a certain point is in? [duplicate]

I'm interested in build a prototype that needs this sort of thing: Point A (xa, ya) with a radius of 500 meters. Point B (xb, yb) with a radius of 700 meters. Point C (xc, yc) with a radius of 1200 ...
4
votes
2answers
767 views

Build times for small incremental changes to C# Web Applications

I have recently been moving away from ASP.NET Websites in favor of Web Applications. More specifically I have recently been picking up MVC as an alternative to developing ASP.NET Forms websites. ...
0
votes
1answer
403 views

Search for object in loop or query? Who has better performance?

I have a DB that stores some complex objects of my app. When my app starts I load the objects into list and store them on the RAM. But sometimes I would like to search for an objects that fulfills ...
1
vote
3answers
220 views

The clock problem - to if or not to if?

Let's say, we have a simple digital clock. To "power" it, we use a routine executed every second. We update seconds part in it. But, what about minutes and hours part? What is better / more ...
3
votes
2answers
267 views

Improving the performance of a db import process

I have a program in Microsoft Access that processes text and also inserts data in MySQL database. This operation takes 30 mins or less to finished. I translated it into VB.NET and it takes 2 hours ...
5
votes
2answers
626 views

Buzzword for “performance-aware” software development [closed]

There seems to be an overabundance of buzzwords for software development styles and methodologies: Agile development, extreme programming, test-driven development, etc... well, is there any sort of ...
1
vote
2answers
198 views

Setter Validation can affect performance?

In a scenario where you use an ORM to map your entities to the DB and you have setter validations (nullable, date lower than today validation, etc), every time the ORM gets a result, it will pass into ...
3
votes
2answers
291 views

Implementing set of processes in a stored procedure or through the code?

I want to know what's the suitable method to implement the following case (best practice). If i make a set of processes like this: select data from set of DB tables. loop on the selected result. ...
1
vote
1answer
552 views

Will JVisualVM degrade application performance?

I have doubts in JVisual VM profiler tool related to performance. I have requirement to implement a JVM Monitoring tool for my enterpise java application. I have gone through some profiling tools in ...
-1
votes
2answers
91 views

Applications affected by memory performance [closed]

I'm writing a paper on the topic of applications affected more by memory performance than processor performance. I've got a lot written regarding the gap between the two, however I can't seem to find ...
0
votes
2answers
237 views

Perfomance of 8 bit operations on 64 bit architechture

I am usually a Python / Database programmer, and I am considering using C for a problem. I have a set of sequences, 8 characters long with 4 possible characters. My problem involves combining sets of ...
1
vote
3answers
2k views

Storing a value vs calling reference for repeated use in Java

I have an old habit of avoiding calling references multiple times, both for easier to read/maintain code, and for possible efficiency. But I'm wondering which is more efficient (memory, performance, ...
3
votes
4answers
2k views

Database is performing slow, even all the tables are having normalization

An interviewer asked me this question: Tables are created with appropriate normalization rules, However the database is performing slow. [Ie.: The select, insert statements are taking time to do ...
5
votes
4answers
579 views

What are the reasons for great performance differences running the same program?

I wrote a Python program that has to perform some expensive spatial searches while holding lots of data in memory. I tried to improve the performance, that is tried different approaches (see my ...
3
votes
2answers
449 views

How relevant are “Requests per second” benchmarks?

Whenever a new framework is released it is a given that someone somewhere will benchmark it against other available solutions. One interesting benchmark is the "Requests per second" benchmark. For ...
2
votes
2answers
1k views

Recommended guidelines for declaring bash/sh variables

I have been programming in BASH for a while now and the scripts that I write are starting to get more complicated. I realized that I started to bring in some habits from C/C++ and wanted to get ...
8
votes
4answers
6k views

How to find bottlenecks in an application? [duplicate]

I'm building an application with lots of components, a lot of which are third-party so I only know what I can get from their documentation. From time to time, by pure luck, I find out one of these ...
3
votes
4answers
333 views

Should We Code for Performance or Stability? [duplicate]

There is a point in time where you make design choices and debate them with management. In my case I have to debate my positions and design choices with senior management but it is frustrating that ...
3
votes
2answers
2k views

CA1819: Properties should not return arrays. Does this happen only with arrays? If yes, why?

I have a question about CA1819 msdn performance warning. The rule is: Arrays returned by properties are not write-protected, even if the property is read-only. To keep the array tamper-proof, the ...
5
votes
4answers
1k views

Performance related doubt in Java with Hibernate

Suppose in some ORM based project (say Hibernate) I am trying to fetch only few columns rather then the whole Object with may be more than 20 attributes. I am writing HQL like "select attr1, attr2 ...
10
votes
5answers
4k views

Is try-finally expensive

In case of code where you have to do a resource cleanup before exiting a function, is there a major performance difference between these 2 ways of doing it. Cleaning the resource before every return ...
4
votes
2answers
5k views

Is rewriting some Java code to C++ using JNI to improve performance a good idea? [closed]

I've tried rewriting some Java functions in C++ and called them using JNI. I observed that it takes longer time to execute the native C++ functions as compared to Java functions, due to the JNI ...
0
votes
1answer
311 views

Will having ClassA extend ClassB slow down my runtime performance compared to having classC which contains all the members of ClassC?

I have a class with a lot of methods. I would like to group similar methods together in their own class, but all of the methods need to extend another class, ClassC. So I was thinking of having ...
2
votes
1answer
2k views

best way to store data from ajax call

I am writing a web-application in which I am retrieving data's from server through AJAX requests and the generate HTML content dynamically. I have some data to load, generate HTML from it and append ...
39
votes
12answers
2k views

Documentation in OOP should avoid specifying whether or not a “getter” performs any computation?

My school's CS program avoids any mention of object oriented programming, so I've been doing some reading on my own to supplement it -- specifically, Object Oriented Software Construction by Bertrand ...
2
votes
2answers
779 views

Methods to identify and resolve memory leaks in the JVM [closed]

As the data is migrated via the object level, there has been a slow upwards trend in memory usage. I can see the periodic gc activity, but the memory trend is still going up slowly. I have currently ...
0
votes
2answers
558 views

How fast should a Python factoring script be?

Just how efficient is "good enough" for all intents and purposes? I wrote a script to simply list off all numbers that divide into an input, x, as pairs (i, n//i) and was just curious how efficient I ...
11
votes
5answers
6k views

Java Heap Allocation Faster than C++

I already posted this question on SO and it did ok. It was unfortunately closed though(only needs one vote to reopen) but someone suggested I post it on here as it is a better fit so the following is ...
2
votes
6answers
2k views

Benchmark of asynchronous code

Asynchronous programming seems to be getting quite popular these days. One of the most quoted advantages is performance gain from removing operations that block threads. But I also saw people saying ...
1
vote
3answers
686 views

Add javascript to all pages (for caching), or only to the pages that require the scripts (for a smaller page size)?

I'm using bits of javascript on my website for an image gallery, smooth scrolling, etc. These scripts are not used on every page (not every page has an image gallery for example). However, the scripts ...
6
votes
1answer
645 views

How to see what parts of your code are run most often?

I would like to be able to see what code in thousands of lines of source code is run most often and takes the longest. The purpose of this would be for optimization. Being able to see what parts of ...
0
votes
2answers
2k views

Is this a good measure of PHP script usage of the system?

I've been trying to see a way to get a measure of how much a PHP script costs of memory to the server. Well, I've found some solutions out there that requires some software to make tests and even ...
2
votes
2answers
343 views

Improving the efficiency of containers with dynamically allocated objects

This is not strictly related to C++ but its type system serves to illustrate the problem well. Assume: We have a generic template Container<T> (such as a std::vector<T>) which stores an ...
2
votes
4answers
573 views

Will object reuse optimize this often-called function?

Suppose I have a function that I need to call a lot, maybe a few thousand times on every mouse down or mouse move. It uses an instance of a function (class), called Transform: function func1(a, b, c) ...