Java Tip: Optimization Technique for Lists

Java Tip: Optimization Technique for Lists

The default size for a Java ArrayList class is 10. When an ArrayList reaches its capacity maximum (10), it increases its capacity by approximately half. That is why an ArrayList takes more time if it is not initialized with the proper size. When you add objects to an ArrayList and it reaches its maximum capacity, it creates another, bigger array (with a capacity of approximately 15) and copies the previous and new objects into the new array.

Obviously, creating a new array and copying objects is costly to performance. So, the best approach is to initialize the ArrayList with a proper size. To do this, you use constructors or ensureCapacity(int capacity), which results in better performance.

For example, use this code if you expect your ArrayList to store around 3000 objects:

List<String> str = new ArrayList(3000)
Share the Post:
Heading photo, Metadata.

What is Metadata?

What is metadata? Well, It’s an odd concept to wrap your head around. Metadata is essentially the secondary layer of data that tracks details about the “regular” data. The regular

XDR solutions

The Benefits of Using XDR Solutions

Cybercriminals constantly adapt their strategies, developing newer, more powerful, and intelligent ways to attack your network. Since security professionals must innovate as well, more conventional endpoint detection solutions have evolved

AI is revolutionizing fraud detection

How AI is Revolutionizing Fraud Detection

Artificial intelligence – commonly known as AI – means a form of technology with multiple uses. As a result, it has become extremely valuable to a number of businesses across

AI innovation

Companies Leading AI Innovation in 2023

Artificial intelligence (AI) has been transforming industries and revolutionizing business operations. AI’s potential to enhance efficiency and productivity has become crucial to many businesses. As we move into 2023, several

data fivetran pricing

Fivetran Pricing Explained

One of the biggest trends of the 21st century is the massive surge in analytics. Analytics is the process of utilizing data to drive future decision-making. With so much of

kubernetes logging

Kubernetes Logging: What You Need to Know

Kubernetes from Google is one of the most popular open-source and free container management solutions made to make managing and deploying applications easier. It has a solid architecture that makes

ransomware cyber attack

Why Is Ransomware Such a Major Threat?

One of the most significant cyber threats faced by modern organizations is a ransomware attack. Ransomware attacks have grown in both sophistication and frequency over the past few years, forcing