[mkgmap-dev] Performance hints for Java JRE 9 + 10

Hi all, it seems that the new Garbage Collector (G1GC) that was introduced with Java JRE 9 causes longer run times for splitter and mkgmap. I've played with some options and found that the use of -XX:+AggressiveHeap seems to be a good idea when you use these newer JREs. Without this option the java programs tend to allocate more memory and thus the OS might start to swap. Gerd