Can Java cold start?

A Piranha based HTTP service

In this installment of the series we are using examples running on Piranha 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 20 - Piranha Nano	78 ms	61 ms	139 ms
Example 21 - Piranha Embedded	79 ms	62 ms	141 ms
Example 22 - Piranha Micro	1,971 ms	6 ms	1,977 ms
Example 23 - Piranha Server	221 ms	19 ms	240 ms
Example 24 - Piranha Nano (Docker)	434 ms	70 ms	504 ms
Example 25 - Piranha Embedded (Docker)	448 ms	60 ms	508 ms
Example 26 - Piranha Micro (Docker)	12,256 ms	7 ms	12,263 ms
Example 27 - Piranha Server (Docker)	797 ms	79 ms	876 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 27th, 2021