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  optimize-link-performance-benchmarks
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perf(router): meet the original Link bundle budgets Move the bounded pathname cache onto RouterCore and reuse one interpolation traversal for pathname generation, cache keys, and optional public metadata. Remove the factory and per-parameter metadata callbacks, preserve decoder invalidation and development server/client overrides, and simplify React Link active-state and state-prop assembly. Public APIs and routing features remain unchanged. Official gzip measurements against parent 37bd31e4e2: - React minimal: 86000 -> 85772 bytes (-228), equal to origin/main. - React full: 89601 -> 89356 bytes (-245), 6 below origin/main. - All 18 Router/Start fixtures shrink by 130-245 gzip bytes. Link remains included; fixtures and the existing Link workload are unchanged. - Independent Link-only changes save 78/86 bytes; core-only changes save 174/169. Combined gzip effects are not additive. Fresh existing production Link benchmark, Apple M4 / Node 24.20.0 / Vitest 4.1.4: 200 persistent Links, eight navigations per batch, 50 warm-up iterations and 10-second measurements, with separate processes in counterbalanced order. - Parent means: 2.903316, 2.908833, 2.945163, 2.955386 ms. - This commit means: 2.941129, 2.941699, 2.920172, 2.970072 ms. - Median run means: 2.926998 -> 2.941414 ms (+0.49% time, near process-to-process noise; no incremental Link speedup claimed). Maximum within-run RME: 0.84%. - Fresh original-baseline comparison: 4.283454 -> 3.016571 ms (-29.58% time). This is the whole-series improvement, not the incremental effect of this commit. Identical focused before/after benchmarks show public helper regressions eliminated, server public families 4.68-12.85% faster, and cached mixed/missing cases 6.50-10.43% faster. Removing the redundant last-template shortcut makes isolated single-template cache hits slower (5.93 -> 7.21 us client per 200 calls; 5.99 -> 6.83 us server). The real Link workload remains effectively flat for this size-reduction step. Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

nx affected --targets=test:eslint,test:unit,test:e2e,test:types,test:build,build --parallel=3

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routerWorkspace