GreptimeDB speeds Prometheus remote-read conversion up to 16× by reusing Arrow strings
GreptimeDB rewrote the recordbatches_to_timeseries function to borrow string slices directly from Apache Arrow arrays and eliminate per-row allocations, cutting CPU usage and boosting conversion speed 4–16× for large remote‑read workloads. This makes Prometheus remote‑read queries far cheaper and improves observability performance for users of GreptimeDB.