RockteMQ-AI commented on issue #10522: URL: https://github.com/apache/rocketmq/issues/10522#issuecomment-4727491890
**Issue Evaluation** Category: `type/enhancement` | Status: **Evaluated** **Feasibility:** Feasible **Scope:** Remoting module — `FastCodesHeader`, `RocketMQSerializable`, header encode/decode path **Compatibility:** Backward compatible (additive changes only) Well-structured proposal targeting a genuine hot path. The observations are accurate: 1. **Primitive decimal writers** — Avoiding `Long.toString()` / `Integer.toString()` boxing on every RPC header encode is a valid micro-optimization. Writing decimal digits directly to `ByteBuf` eliminates transient `String` allocation. 2. **`SINGLE_BYTE_STRINGS` cache** — Reasonable for the common case of short ASCII header values. The 128-entry cache covers all single-byte ASCII and is small enough to have negligible memory footprint. 3. **HashMap capacity 128 → 24** — Typical Remoting headers have 5-15 entries; 24 (with 0.75 load factor = 32 buckets) is a better default. This reduces per-RPC memory waste without impacting larger headers (HashMap resizes as needed). 4. **`FastCodesHeader` primitive helpers** — Clean API extension that keeps the existing `writeIfNotNull` contract. This is consistent with the ongoing allocation-reduction effort (#10443, #10491, #10485, #10514, #10513, #10517). The changes are additive and low-risk. --- *Automated evaluation by RockteMQ-AI* -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
