Member-only story

Multithreading in slow JavaScript compared to Java using Fibonacci series

Parallel calculation of Fibonacci numbers in Java and JavaScript

Marian C.
12 min readJan 1, 2022

Why to use multiple threads in JavaScript

Without I/O operations, JavaScript is slower than Java even several times. It is better to not to use JavaScript if you want that you code computes fast. However, compared to verbose Java, JavaScript is a very convenient language for data processing. What to do — to suffer with types and handicapped streams in Java or to try to make JavaScript code work faster? There are not so many options for increasing speed of JavaScript code.

Usually JavaScript applications use only one thread. Sometimes it is possible to upgrade code so that it uses all available processors. Code that runs in multiple threads will run even faster if even more processors are available.

In this post I use Fibonacci numbers, a classic sample use case for parallel computation, to compare multithreading in JavaScript and Java.

Multithreading in JavaScript

Worker threads are independent instances of a JavaScript engine

--

--

Marian C.
Marian C.

Written by Marian C.

Java, JavaScript and SQL developer. Interested in data collection and visualization.

Responses (3)