WIP core perf optimizations

bench/budget_opt-20260422-190901/results.csv

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+scenario,median_time_ms,p95_time_ms,p99_time_ms
+"sac,TX=6000,T=8",268.75913299999957,293.12935219999963,318.0013615999997
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bench/budget_opt-20260422-190901/stamp

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+Benchmark ledgers=200

bench/cache_budget-20260416-170151/results.csv

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+scenario,median_time_ms,p95_time_ms,p99_time_ms
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+"soroswap,TX=2000,T=8",315.9667809999992,351.90522820000075,397.0369427499969

bench/cache_budget-20260416-170151/stamp

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+Benchmark ledgers=200

bench/cache_xdr_size-20260411-002309/results.csv

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+scenario,median_time_ms,p95_time_ms,p99_time_ms
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bench/cache_xdr_size-20260411-002309/stamp

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+Benchmark ledgers=200

bench/create_upd_wo_loading-20260410-221400/results.csv

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bench/create_upd_wo_loading-20260410-221400/stamp

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bench/disable_meta-20260410-205536/results.csv

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bench/disable_meta-20260410-205536/stamp

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bench/garand-opt-20260420-220226/results.csv

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