docs(perf): close out the despeckle optimization round with final baselines

despeckle/docs/cleaner-baseline.md

@@ -5,28 +5,28 @@ Times each Leptonica primitive the page cleaner composes on a synthetic
 600-dpi A5 page (3496x4961 px, fixed seed). Re-run after any change to the
 cleaner or the imaging bindings and compare before merging.
 
-- Date (UTC): 2026-06-10 06:48:05
+- Date (UTC): 2026-06-10 06:57:51
 - Host: Linux amd64, 8 CPUs
-- Samples: median of 10 reps after 2 warmups; single-threaded.
+- Samples: median of 14 reps after 2 warmups; single-threaded.
 
 | op | median (ms) | min (ms) | calls/clean() | est. share of clean() |
 |---|---:|---:|---:|---:|
-| read TIFF-G4 | 2.58 | 2.54 | 1 | 2.0% |
-| selectBySize k=6 (page) | 15.22 | 14.89 | 1 | 11.6% |
-| selectBySize 15 (page) | 15.40 | 14.93 | 1 | 11.7% |
-| selectBySize k=6 (inverted) | 22.36 | 22.04 | 2 | 34.1% |
-| dilate 43x43 (text mask) | 14.08 | 13.74 | 1 | 10.7% |
-| open 7x7 (page) | 4.01 | 3.85 | 1 | 3.1% |
-| invert | 0.27 | 0.25 | 2 | 0.4% |
-| subtract | 0.40 | 0.38 | 5 | 1.5% |
-| and | 0.45 | 0.41 | 1 | 0.3% |
+| read TIFF-G4 | 2.55 | 2.52 | 1 | 1.9% |
+| selectBySize k=6 (page) | 15.34 | 14.99 | 1 | 11.7% |
+| selectBySize 15 (page) | 15.35 | 14.98 | 1 | 11.7% |
+| selectBySize k=6 (inverted) | 22.20 | 21.88 | 2 | 33.9% |
+| dilate 43x43 (text mask) | 14.36 | 13.62 | 1 | 11.0% |
+| open 7x7 (page) | 4.10 | 3.90 | 1 | 3.1% |
+| invert | 0.26 | 0.25 | 2 | 0.4% |
+| subtract | 0.49 | 0.43 | 5 | 1.9% |
+| and | 0.42 | 0.40 | 1 | 0.3% |
 | or | 0.40 | 0.36 | 3 | 0.9% |
-| countConnComp | 11.64 | 11.50 | 2 | 17.8% |
+| countConnComp | 11.80 | 11.57 | 2 | 18.0% |
 | countPixels | 0.42 | 0.41 | 2 | 0.6% |
-| write TIFF-G4 | 6.34 | 6.27 | 1 | 4.8% |
-| **Σ(median × calls)** | 130.66 | | | 99.6% |
-| **clean() end-to-end** | 131.15 | 129.19 | 1 | 100% |
-| **clean() without component stats** | 107.60 | 106.36 | 1 | 82.0% |
+| write TIFF-G4 | 6.42 | 6.30 | 1 | 4.9% |
+| **Σ(median × calls)** | 131.54 | | | 100.5% |
+| **clean() end-to-end** | 130.93 | 129.00 | 1 | 100% |
+| **clean() without component stats** | 106.76 | 105.29 | 1 | 81.5% |
 
 The Σ row landing near 100% means the table accounts for clean()'s real cost;
 a large gap points at untimed work (allocation churn, codec internals).

pipeline/docs/perf-baseline.md

@@ -6,7 +6,7 @@ of the installDist `pdfbook` launcher. Re-run after any change to the pipeline
 and compare against the previous run before merging (acceptance: ≥5% median
 total-wall improvement, or an explicit RSS/disk win, with output validated).
 
-- Date (UTC): 2026-06-10 04:46:07
+- Date (UTC): 2026-06-10 07:01:04
 - Host: Linux 6.8.0-124-generic amd64, 8 CPUs, RAM 16Gi
 - Launcher: `pipeline/app/build/install/pdfbook/bin/pdfbook`
 - Samples per measurement: cold (1st run) + warm median of 3.
@@ -21,8 +21,8 @@ total-wall improvement, or an explicit RSS/disk win, with output validated).
 
 | Input | Jobs | Pages | E2E wall | conv | extract | despeckle | register | spread | startup+init | Cold wall | Peak RSS (MiB) | Output (MiB) |
 |---|---|---:|---:|---:|---:|---:|---:|---:|---:|---:|---:|---:|
-| sample-scan-200p.pdf | 1 | 200 | 50.10s | 49.85s | 4.57s | 32.16s | 12.94s | 0.20s | 0.25s | 51.42s | 156 | 6.4 |
-| sample-scan-200p.pdf | 8 | 200 | 14.77s | 14.48s | 1.15s | 9.85s | 3.27s | 0.21s | 0.29s | 15.04s | 328 | 6.4 |
+| sample-scan-200p.pdf | 1 | 200 | 35.83s | 35.63s | 0.90s | 21.23s | 13.13s | 0.19s | 0.20s | 36.61s | 187 | 6.4 |
+| sample-scan-200p.pdf | 8 | 200 | 9.23s | 9.03s | 0.45s | 5.21s | 3.16s | 0.20s | 0.20s | 9.30s | 379 | 6.4 |
 
 ## Stage shares (of conv, warm median)
 
@@ -31,5 +31,5 @@ cannot pay for a parallelization rewrite no matter how elegant.
 
 | Input | Jobs | extract | despeckle | register | spread |
 |---|---|---:|---:|---:|---:|
-| sample-scan-200p.pdf | 1 | 9.2% | 64.5% | 26.0% | 0.4% |
-| sample-scan-200p.pdf | 8 | 7.9% | 68.0% | 22.6% | 1.5% |
+| sample-scan-200p.pdf | 1 | 2.5% | 59.6% | 36.9% | 0.5% |
+| sample-scan-200p.pdf | 8 | 5.0% | 57.7% | 35.0% | 2.2% |