Optimize stroke cache and benchmark configurations

- Updated stroke cache to use parallel processing for pixel checks.
- Modified benchmark commands in notlar.txt to ensure consistent output and baseline comparisons.
- Created a plan for merging criterion directories and optimizing benchmark performance, including pre-allocation of buffers and various optimization strategies.
- Removed redundant output directory settings in benchmark files and ensured all benchmarks write to a single criterion directory.
- Updated documentation to reflect changes in benchmark paths and configurations.

notlar.txt

@@ -9,18 +9,34 @@ criterion Benchmark
 cargo bench -p hcie-engine-api
 
 # Mevcut mükemmel performansı kalıcı bir baseline (referans) olarak kaydetmek için:
-# (Not: Hata almamak için hcie-engine-api/Cargo.toml'da [lib] altına bench = false eklendi)
-cargo bench -p hcie-engine-api -- --save-baseline gold_standard
+# (Not: bench = false kaldırıldı, [[bench]] target'ları doğrudan çalışıyor)
+cargo bench -p hcie-engine-api --bench stroke_mask_pooling -- --save-baseline gold_standard
+cargo bench -p hcie-engine-api --bench composite_scratch_pooling -- --save-baseline gold_standard
+cargo bench -p hcie-engine-api --bench below_cache_reuse -- --save-baseline gold_standard
+cargo bench -p hcie-engine-api --bench effects_skip -- --save-baseline gold_standard
 
 # Kaydedilen 'gold_standard' baseline'ı ile karşılaştırma (regresyon testi) yapmak için:
-cargo bench -p hcie-engine-api -- --baseline gold_standard
+cargo bench -p hcie-engine-api --bench stroke_mask_pooling -- --baseline gold_standard
+cargo bench -p hcie-engine-api --bench composite_scratch_pooling -- --baseline gold_standard
 cargo bench -p hcie-engine-api --bench below_cache_reuse -- --baseline gold_standard
+cargo bench -p hcie-engine-api --bench effects_skip -- --baseline gold_standard
 
-# Criterion sonuçları ./criterion/ dizinine kaydedilir (CRITERION_HOME=criterion)
+# Criterion sonuçları ./criterion/ dizinine kaydedilir
+# CRITERION_HOME, .cargo/config.toml içinde ayarlanmıştır (relative = true)
 # Rapor: ./criterion/report/index.html
 #criterion açıklamaları
 criterion.md
 
+# Gold Standard Baseline (2026-07-25, par_chunks_exact optimization):
+# stroke_mask_pooling/cold_first_stroke:  39.74 ms
+# stroke_mask_pooling/warm_10th_stroke:   17.34 ms
+# composite_scratch_pooling/cold_composite: 770.86 ms
+# composite_scratch_pooling/warm_composite: 10.43 ms
+# below_cache_reuse/first_stroke_cache_build: 781.66 ms
+# below_cache_reuse/second_stroke_cache_reuse: 16.33 ms
+# effects_skip/no_effects_composite:      17.15 ms
+# effects_skip/with_one_dropshadow:       15.16 ms
+
 ##test
 Running the Tests Automatically
 To run only the new proximity dedup tests: