Can Java cold-start?

An OpenLiberty based HTTP service

In this installment of the series we are using examples running on OpenLiberty to cold start the HTTP service.

If you want to run the experiment yourself you can download the example.tar.gz file.

Example	Process start	Process ready	Process total
Example 39 - OpenLiberty	1,137 ms	109 ms	1,246 ms
Example 40 - OpenLiberty (Docker)	2,020 ms	110 ms	2,130 ms

These numbers were collected on a Mac Mini M1 with 16GB using Java 17

Process start - the amount of time it takes before the JVM is executing your code.
Process ready time - the amount of time it takes for the HTTP server to be ready for processing.
Process total - the total time (process start + process ready).

If you have any comments, suggestions or concerns, please start a discussion on GitHub.

Posted November 5th, 2021