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

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The reason I wanted to ask is because of some code from Undertale that is responsible for choosing which dialogue set to use. It works something like this: switch (id) { case 0: msg[0] = &...
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I'm currently analyzing a process that is considered too slow. In summary, it's a task that loads a lot of data from Microsoft SQL Server, performs some basic stuff on it, and creates a report. It ...
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We have softwares that specify minimum hardware requirements. So, how to figure out what specs we need in case we want to scale up our systems. Like I'm working on server performance monitoring setup ...
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I have a task to merge set of files and each file contains words ( separated by new line ). Files contains words in sorted order. Once merged all the files, it needs to preserve the sorted order. ...
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All optimising Javascript runtimes use "shapes" (SpiderMonkey term) or "hidden classes" so that instead of objects being treated as the dictionaries or hashmaps they can instead be ...
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I am working on my DDD know-what/how and have the following questions related to the Specification Pattern, the Repository Pattern, persistence agnosticism, and performance. Consider, for the sake of ...
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I have a Web API in C# that receives data from various clients, which needs to be saved to the database. Each client sends data approximately every 10 seconds. To save this data, I need to base it on ...
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I am currently making a system for users to generate flashcards for Languages. This involves adding information such as the definition, pronunciation, and example sentences for a word. So far, I have ...
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I am developing a diagramming application and want to optimize operations with the Nodes and Relations of the diagram. Currently, I am using a relational database with tables for diagrams and nodes. ...
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let's say we're building an Ecommerce Marketplace. We have Sellers and each Seller has Products. We want to display a list of available Products across all Sellers to Buyers. But, we only need to ...
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Intro I'm writing an FPS game in c++. There is a timed game mode, players run around a map shoot from a variety of weapons which are either hitscan or projectile based, when a shot connects, based on ...
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We have a huge amount of queries hitting our API that request a minor or major extract of some huge files lying around on our mounted hard drives. The data needs to be extracted from the files and ...
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From Ch 12 (Resiliency) of the book "Building Microservices" In the context of how much resiliency is too much resiliency How long should various operations take? It can be useful to ...
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As mentioned in some StackOverflow posts (like this one), I'm dealing with a difficult situation: My company is developing some C# applications (being a client-server application). We have migrated ...
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I am writing my first application using DDD (in Node with TS) and I started writing all the domain first -- before starting the repositories/DB and then the application, while writing unit tests for ...
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I am writing a recursive function. Some of the parameter data is different for each recursive call but some of the data only need to have one copy existing at any one time during the recursive call. ...
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Lets say I have students and classes which are 2 entities. A student can take many classes and a class can have many students. This would be a many to many relationship. To solve this with an RDBMS my ...
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In C# and C++, an apparent trend is in place to reduce / avoid inheritance: C#: "Sealing types can improve performance." https://learn.microsoft.com/en-us/dotnet/fundamentals/code-analysis/...
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I've just accidentally came across this answer about inlined functions and I'd like to know how this affects call stack. But I can't add comments because I don't have enough rep so I decided to ask ...
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I am quite new to design software and especially graphs. So I am working on a full-stack app with a back-end built on FastAPI (python) et front-end on React. I need to create 4 graphs on a single page ...
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How can I make DRY (lacks repetitive patterns) code that also avoids inefficiencies from using intermediate values in a calculation that might not need to be used? Here is an example: In this code, I ...
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Consider Mastodon as an example - basically open source Twitter. Tweets can be up to 500 characters long. Of course, since it's open source, you can modify it to allow longer tweets. Unmodified ...
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I've been learning C recently. I've completed a number of coding challenges on websites like codewars in C, and I always find myself wishing I had something like Python's flexible data structures. In ...
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Most useful or reasonably complex applications need to save data such as user settings or saved games or browser history. I have been working on applications and games in C or C++ but I am not sure ...
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I have a DigitalOcean droplet on which I have deployed a Docker container (Docker version: 20.10.14), but my app is sometimes slow, therefore I would like to allocate more resources to it. The droplet ...
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We have 2 systems Legacy & New and I have to migrate the data from the legacy system to the new system. The legacy system exports the data in .csv format while the new system accepts the data in ...
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I have an algorithm that runs a search through every combination of a 5x5 grid where each cell can have 3 values, looking to see which combinations meet certain conditions. This gives 3^25 naive ...
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I'm working on an implementation of the "log transform" operator on an image for C++, and we currently have it formulated as follows (python code). Note we use log10 instead of the natural ...
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First question here, so preemptive apologies if I've committed some faux-pas. Additionally, I am aware that this question is about possibly the micro-est of micro-optimizations ever, and "micro-...
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I have a simple 2D game which has squares, player (teal) and enemies (red). class Game { List<List<Square>> map; Player player; List<Enemy> enemies; ... My problem is that I ...
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Objective: Designing a data intensive application(myApp) C++ on Linux/RTOS which runs on a single core cpu, there are also 150 other applications share the same core with high priority than myApp. How ...
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I wrote some script in Python that creates a giant 2D matrix (1000x1000 or bigger) and fills it with random numbers. And after that, it goes through every element of the matrix and changes the number ...
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We have a largeish .NET Core project which uses Mediatr and EF Core. Many of the queries look something like: public class GetSomeInformation : IRequest<string> { public int DocumentId { get;...
Lou's user avatar
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Let's assume we have a method that we want to run as fast as possible and it needs to loop on a 2D array, naturally we would do a nested for loop as such: int[][] arr = new int[3][3]; for(int ...
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I was reading a bit about garbage collectors and I am wondering if the garbage collector of a program scans the entire heap memory or what is allocated to it? If it reads the entire system memory, ...
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for example: const arr = [1,2,3,4]; const coordinate = [arr[0] + 2, arr[0] + 1]; here arr[0] is written out twice, when the code is executed would it literally go and find same value twice or would ...
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I have been using "Perf" when writing about performance of some pieces of software (in tools, pull requests, etc.) but was wondering recently if this was an appropriate practice. Can I ...
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Processors have come a long way in their handling of unaligned data - from crashing at the very notion of it, through suffering severe penalties, all the way to having almost no impact. I suppose it ...
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Relational database is mostly used for storing editable user data. But how about storing non-editable lists of information? Possible examples are: GUI-related: main menu items, selectbox options, ...
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I was asked to refactor some C++ code recently for the purposes of increasing unit testing coverage. The problem was that the code was tightly coupled on one compilation unit, so we had the equivalent ...
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An external consultant to our team advised us to rewrite our SaaS offering (essentially a CRUD API) in .NET because this is more "scalable" than using Node.js (or Ruby on Rails, Flask, etc.)....
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I am having difficulty understanding how denormalization results in more storage necessary. For example, let's say that in a normalized relation, there's Table 1 and Table 2. In order to join Table 1 ...
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Is there any performance detriment to assigning variables vs using them inline. I'm guessing this WOULD be worse if a method was returning primitive and I was 'boxing' it (e.g. method returning int, ...
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Might be a silly question or something I might have just messed up in my head but here we go... I saw a code example of someone using getPos() in their own class to retrieve the current position of an ...
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My application has big integration with the database. Classes that use the database are very crucial for the system, so I write small unit tests for classes that I call Repository. The reason behind ...
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We have an application producing 5k-10k datapoints per second. Each datapoint has more than one metric, alongside its time of creation. We are looking for an efficient, scalable way to store this huge ...
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I have a very big form - let's call it <MyForm> - consisting of the following: text fields and dropdowns custom selector made of selectable cards table input (for this example 50 rows with each ...
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I have been given the job of a colleague who has resigned and I don't know where to start. I hope you can give me some hints: It is about a CMS made from scratch (Javascript/jQuery/PHP/MySQL) which ...
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Here is the question. On a 2.2 GHz processor with 6 physical threads and 6 hyperthreads, I see performance on the order of 3-10s for a particular job involving OpenCV. I do not specify that the ...
Chris's user avatar
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I wrote a prioritized/weighted left shuffle algorithm (the code is copied from my open source C# project Fluent Random Picker). What does that mean? You've got some values and each of them has a ...
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