Elias sat in the dim glow of his monitors, the hum of the server room providing a steady baseline to his frustration. He was a digital archivist, a man who spent his days retrieving lost files from the "bit-rot" of old hard drives.
| Metric | Scalar (x86‑64) | SIMD (ARM‑Neon) | Remarks | |--------|-----------------|-----------------|---------| | Latency per call | ~18 ns (≈ 7 cycles) | ~7 ns (≈ 3 cycles) | SIMD version processes 4 values in parallel; per‑value latency is lower. | | Throughput (single core) | 55 M conversions / s | 130 M conversions / s | Sufficient for > 10 Gbps line‑rate (≈ 125 M packets / s). | | Power impact | Negligible (< 0.2 W) | Slightly higher due to NEON activation, still < 0.3 W. |
*out_converted = min + scaled; return 0;
| Release | Feature | Reason | |---------|---------|--------| | (2022‑09) | Added convert015838 | Needed a deterministic, reversible mapping for the 15‑bit‑to‑38‑bit counter expansion used by legacy DSL‑CPE firmware. | | PPPD 9.0.0 (2023‑04) | Introduced min_exclusive flag | Telemetry standards (RFC 8623) started to require strict “greater‑than” semantics for low‑value thresholds. | | PPPD 9.1.1 (2024‑01) | Optimised for SIMD on ARM‑Neon | Achieved ~2× throughput on 10 GbE line cards. | | PPPD 9.2‑beta (2025‑07) | Added compile‑time static‑assert for overflow protection. | Prevents silent wrap‑around on 32‑bit hosts. |
The phrase can be broken down into several components: