Definition
Plain language
The memory-checkpoint half of DeltaBox that saves and restores running processes in milliseconds.
As stated in the literature
DeltaBox's process-state checkpointing component, which forks a frozen parent for fast restore while writing an incremental CRIU dump in the background for durability.
Why it matters: It delivers millisecond-scale process rollback for stateful agents, where standard checkpointing would be too slow to use in the inner loop.
For example, when an agent hits a checkpoint, DeltaCR forks the running process so a frozen copy waits to be restored, while a background CRIU dump quietly writes the state to disk.
Heard on the show
“So tell me how DeltaCR — the memory side — handles that.”Episode 068 — The OS Trick That Makes Tree Search Practical for Coding Agents