Jaguar to the Rescue

JNI is a bad match for implementing Java VIA
Too slow:
Extra data copy on send/recv
Wrong model:
VIA is about fast access to NIC resources

My solution: Jaguar
"Java Access to Generic Underlying Architectural Resources"
Close gap between Java and low-level machine operations
Idea: map Java bytecode to inlined machine code
Maintain type- and reference-safety
Fast, protected access to system resources

Extensible Just-in-Time Compiler
"Pluggable" bytecode -> machine code transformations
Sidecar to JVM
No need to reengineer JVM itself