Replacing Default Tomcat Server With Jetty or Undertow in Spring Boot 3: A Guide

Migration is relatively a straightforward process, but it's important ensure adequate testing is done before deploying it to production. 

Here is my take:

Memory footprint-  All three comparable. Jetty takes lowest among all.
Performance- Undertow is the winner, followed by tomcat and jetty.
Ability to handle request per seconds- Jetty and undertow has a slight edge over tomcat.

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Overall all three are quite mature embedded servers and widely accepted. It boils down to personal preferences.

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