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Patternia v0.7.3 Release Note

Release Date: February 16, 2026
Version: 0.7.3

🎆Happy Chinese NewYear!🎆

Overview

Patternia v0.7.3 is a performance-focused patch release. Compared with v0.7.2, this version reduces unnecessary value copies in binding paths and adds a repeatable heavy-bind benchmark workflow for regression tracking.

Highlights

Binding Path Performance Optimization

  • bind() now binds the subject by reference instead of materializing an eager value copy.
  • bind(subpattern) now composes the subject binding by reference with subpattern bindings.
  • Structural binding (bind(has<...>)) now binds member fields by reference, avoiding extra copies for large payload members.

Heavy-Bind Benchmark Scenario

  • Added BM_Patternia_PacketMixedHeavyBind to stress large payload binding paths where copy/reference behavior is most visible.
  • Added BM_Switch_PacketMixedHeavyBind as baseline for the same workload.

Benchmark Comparison Tooling

  • Added scripts/bench_stage_results.py to normalize two result.json files into a standard local layout.
  • Added/updated scripts/bench_compare.py to render chart + markdown reports with labels, filtering, and single-benchmark summary layout.

Performance Comparison vs v0.7.2

For the heavy-bind scenario (PacketMixedHeavyBind), v0.7.3 is designed to highlight the effect of copy elimination in binding paths.

Reference visualization generated from local compare workflow:

Patternia v0.7.3 Heavy Bind Benchmark

Note: absolute numbers vary by machine and run conditions. Use the staged compare scripts to evaluate your local baseline and current build under the same environment.

Compatibility Notes

  • API surface: unchanged.
  • Source compatibility: generally unchanged.
  • Behavioral detail: bindings from bind()/structural bind paths are now reference-oriented by default, reducing implicit copies.

Implementation Notes

  • include/ptn/pattern/bind.hpp
  • Updated binding construction to reference-based tuples.
  • bench/bench_match_variant.cpp
  • Added heavy-bind packet workload and benchmark pairs.
  • scripts/bench_stage_results.py
  • Added benchmark result staging utility.
  • scripts/bench_compare.py
  • Added improved comparison rendering and filtering.