franz1981 edited a comment on issue #2950: ARTEMIS-2604 Save Message decoding 
when unnecessary
URL: https://github.com/apache/activemq-artemis/pull/2950#issuecomment-581056951
 
 
   @michaelandrepearce @wy96f I finally got some numbers about the loading of 
journal:
   
   this commit:
   start: 19:28:08,193
   end: 19:28:28,391
   
   ~20 seconds
   
   2.11:
   start: 12:12:22,651
   end: 12:13:15,625
   
   ~ 53 seconds
   
   It seems about twice as faster assuming a very fast disk :)
   But, although it seems an improvement from the point of view of speed of the 
algorithm of loading, in reality, it uses much less memory then before, hence 
hitting much less full GCs.
   In my tests, with. 2.5 GB if journal and a 4 GB broker, with this PR I can 
lower the heap size until 3 GB getting decent performance while loading, while 
with 2.11 i have to raise it to 6 GB to make the loading quick as this pr with 
3 GB. And I still need to take care of Long boxing, probably in a follow up pr 
;)

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