Javascript Map()s compare object keys by identity, which means Map<[number, number], any> is a bad idea: const map = new Map(); const coordinates = [1, 3]; map.set(coordinates, 0); map.get([1, 3]); # undefined To avoid this, we commonly see keys set…
I'm using a postgresql (15.5) database with the following logic: We have "meters" who measure electrical consumption. We have "computer meters" who are calculation of the measurements of different meters. For exemple "computedMeterA" = "meterA" + "meterB" I have classical…
I am not sure on how to begin optimizing this High Latency SQL query that my platform runs. Other than reducing the datasets, what are some things that I can do? SELECT ctm.* FROM compound_transaction_map ctm JOIN bustransaction_map btm ON…
I'm seeking help regarding full-text searching in MySQL. I have two tables, Article and Keywords. Article: id int, description (varchar(600)) Keyword: id int, value (varchar(50)), article_id int An article can have multiple keywords. For example: id:1, keyword1, article_id: 1 id:2,…
Mysql 8 takes 2 minutes to sort an empty set The following table on 8.0.33 MySQL Community Server CREATE TABLE `eventiAcc` ( `chiave` int NOT NULL AUTO_INCREMENT, `tipo` tinyint NOT NULL, `account` int DEFAULT NULL, `utente` int DEFAULT NULL, `timestp`…
Some background: I'm running the following simple select statement on Postgres 15.3 server with 128GB memory, and contrary to my belief it takes ~6 minutes. The statement in involve two relations, big_table_70m with approximately 70M rows and other_table_50m with a…
The Problem To set the scene, I work on a PHP Laravel system that has taken a drupal-style approach where every field is its own MySQL table. Every table has optimum indexing making it very quick to fetch data for…
Running apps in debug mode has become noticeably slower in recent days. There are several posts about slow debug performance but no clear explanation on how to remedy the problem. The project doesn't have any breakpoints. Android Studio 2.2.1: Slow…
I am creating an application which will enable users to create posts and also like posts. I am using MySQL to store all the data. I have the tables users and posts. I want to prevent the situation where a…
I want to create a function to compare a list of objects in the fast way for (let i = 0; i < posts.length - 1; i++) { for (let j = i + 1; j < posts.length; j++) {…