Lightning Talk: Continuations & Filters
summary
Proposal adds delimited continuation support directly to HotSpot so userland code implements a Java Fiber class that behaves like a thread but is scheduled by the JVM, not the OS. Claim: servers waiting on I/O can scale to a million concurrent connections because blocking becomes cheap and asynchronous I/O runs under the hood. Implementation plan: one HotSpot primitive that captures the stack, fibers built in pure Java, plus work on synchronization semantics, object weights and retrofitting IO.
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