Can Java cold start?

A Tomcat based HTTP service

In this installment of the series we are using examples running on Tomcat 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 18 - Tomcat	465 ms	104 ms	569 ms
Example 19 - Tomcat (Docker)	2,020 ms	542 ms	2,562 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 October 26th, 2021