[geodel]

There were 3 points mentioned in post with only 1 about GC. Performance and memory efficiency were major points not delivered by standard idiomatic Java code.

Considering the popularity of memory compact Java collections like Fastutils etc I feel that memory bloat of standard Java is very common issue plaguing Java applications.

[pcwalton]

If you read the comments, you'll find that the issue is in fact GC: specifically, the cost of tenuring objects.