Jerónimo LópezBikeyIn this post I present Bikey, a Java library to create Maps and Sets whose elements have two keys, consuming from 70%-85% to 99% less…May 29, 2019May 29, 2019
Jerónimo LópezMeasuring actual memory consumption in Java: JMnemohistosyneTL;DR: in this post I present to you JMnemohistosyne, a small utility to calculate the histogram of classes with the memory consumed in a…Mar 24, 2019Mar 24, 2019
Jerónimo LópezComposite key HashMapsIn my last post I talked about the problems of using an incorrect hash function when you put an object with a composite key in a Java…Mar 13, 2019Mar 13, 2019
Jerónimo LópezHashing and mapsDon’t worry, I’m not going to talk about blockchain or geopositioning, but a more boring and basic topic: hash and hash map functions.Feb 10, 20191Feb 10, 20191
Jerónimo LópezPersisting fast in database: LOAD DATA and COPYIn previous articles, I talked about how to persist a lot of information as quickly as possible when you are constrained to JPA and how to…Jan 12, 2019Jan 12, 2019
Jerónimo LópezPersisting fast in database: JDBCIn my previous post I explained how to persist information when you are forced to use JPA, and how to make it run as fast as possible…Nov 11, 20183Nov 11, 20183
Jerónimo LópezPersisting fast in databaseWhen you have a lot of data to persist in a short time, you have to look for each inefficiency in your database access.Aug 24, 20185Aug 24, 20185