As a consequence of Galleon RFEs EAP7-891 and mainly EAP7-1216 there is big difference in pod with EAP application start up time which requires S2I configuration.

This is an overview of quick comparison of average boot times of the application pods of the attached test app (we are not interested in build/deploy pod times etc):

pod time = time from the pod start until EAP is fully booted (log contains started in ..)
EAP boot = time of boot EAP itself == started in ..
config time = the difference of previou timess = anything before EAP boot begins

Again we are talking here about the time needed for prepared application image to full start. We can clearly see the EAP boot times are comparable between 17 and 18 images but the configs times are almost 4 times longer with CD18 images.

This is very unfortunate as in my point of view the pod boot time is the most critical time for our users - they would typically prepare the app images only once in a time but their application can scale up and down many times during its uptime.

The cause of this that when S2I is needed with image 18.0+ the part of the configuration that was previously done during S2I build just once is now processed on each pod start.