Right now in the datacenter CPU usage is considerably more expensive than RAM usage. Ram consumes comparatively little power, whereas burning hot CPUs+GPUs are the reason datacenters are favored near cooling water and power stations. 2.48 vs 12.23 seconds for Java and Go is a big deal for how many solar panels or tons of coal are needed to run an app on Xeon or Epyc instances, whereas 1.7GB vs 0.4GB for Java and Go, a 4x difference in low-power memory usage, is not so big of deal.
At any rate I did link to the full table so everyone can see the mem usage, source listings, etc.
Just for fun set the Java heap to .4 Gigs or use GOGC to set the Go heap to 1.7 Gigs. If Go is faster then try some other sizes and draw a graph to see what the lines look like.
Further not mentioning memory used Java/Go programs makes it very fair comparison. Because GC perf does not depend on memory allocated.