Graal
summary
Graal is an open source interpreter, optimizer and runtime that virtualizes language environments so multiple languages run in the same process using a single VM rather than via JSON RPC or pipes. It claims concrete wins: Twitter reports a 25% throughput boost for tweets on the same hardware. The system removes cross‑language encoding, exposes shared objects directly, and lets teams mix Java, JS and other languages while keeping ops simpler and performance higher.
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