Depends on which one, the Escape Analysis in java7 Hotspot is quite conservative. The one in Graal is very aggressive https://wiki.openjdk.java.net/display/Graa

Depends on which one, the Escape Analysis in java7 Hotspot is quite conservative. The one in Graal is very aggressive https://wiki.openjdk.java.net/display/Graal/Graal+Partial+Escape+Analysis https://wiki.openjdk.java.net/display/Graal/Graal+Partial+Es.... Not sure what other VMs do.