Go with the flow
Guoqing Harry Xu, Matthew Arnold, Nick Mitchell, Atanas Rountev, Gary Sevitsky · 2009
Many large-scale Java applications suffer from runtime bloat. They execute large volumes of methods, and create many temporary objects, all to execute relatively simple operations. There are large opportunities for performance optimizations in these applications, but most are being missed by existing optimization and tooling technology. While JIT optimizations struggle for a few percent, performance experts analyze deployed applications and regularly find gains of 2x or more.