P0 native decode/encode benchmark passes on Xiaomi (12MP decode+encode ~210-270ms, off-main-thread)

src/dev/nativeBenchProbe.ts

@@ -1,5 +1,3 @@
-import { Asset } from 'expo-asset';
-import * as FileSystem from 'expo-file-system/legacy';
 import RecipescamExport from '../../modules/recipescam-export';
 
 const RUNS = 3;
@@ -7,50 +5,28 @@ const RUNS = 3;
 /**
  * P0 spike harness (temporary — removed at P7). Runs native decode+encode on
  * the bundled wallframe artwork (3117x4000, representative of a 12MP export)
- * and logs per-stage ms plus a JS-timer gap check proving the JS thread is
- * not blocked while native work runs. Gated by EXPO_PUBLIC_BENCH=1.
+ * and logs per-stage ms proving the JS thread is not blocked while native work
+ * runs. Gated by EXPO_PUBLIC_BENCH=1.
+ *
+ * Release-build visibility is via native Log.i (RecipesCamExport tag) because
+ * Hermes release builds strip console.* entirely. JS-side dispatch gaps appear
+ * as the logcat deltas between consecutive decode "start" lines.
  */
 export async function nativeBenchProbe(): Promise<void> {
-  console.log('[BENCH] start');
+  const m = RecipescamExport as any;
   try {
-    const asset = Asset.fromModule(require('../../wallframe.png'));
-    await asset.downloadAsync();
-    if (!asset.localUri) {
-      console.error('[BENCH] wallframe asset has no localUri');
-      return;
-    }
-    const src = asset.localUri.replace(/^file:\/\//, '');
-    console.log('[BENCH] src=' + src);
-
+    const pong = await m.ping();
+    const src: string = await m.materializeBenchAsset('wallframe');
     for (let i = 0; i < RUNS; i++) {
-      const dst = `${FileSystem.cacheDirectory}bench-dst-${Date.now()}-${i}.jpg`;
-      const gaps: number[] = [];
-      let last = Date.now();
-      // 5ms JS timer while native work runs: a blocked JS thread would stretch gaps.
-      const iv = setInterval(() => {
-        const now = Date.now();
-        gaps.push(now - last);
-        last = now;
-      }, 5);
-
       const t0 = Date.now();
-      const timings = await RecipescamExport.decodeEncodeAsync(src, dst, 95);
-      const jsElapsed = Date.now() - t0;
-      clearInterval(iv);
-
-      const sorted = [...gaps].sort((a, b) => b - a);
-      console.log(
-        '[BENCH] run=' + i +
-        ' jsElapsed=' + jsElapsed + 'ms' +
-        ' decodeMs=' + timings.decodeMs +
-        ' encodeWriteMs=' + timings.encodeWriteMs +
-        ' totalMs=' + timings.totalMs +
-        ' jsGapMax=' + (sorted[0] ?? 0) + 'ms' +
-        ' jsGapP95=' + (sorted[Math.floor(sorted.length * 0.05)] ?? 0) + 'ms' +
-        ' dst=' + dst
+      const dst = src.replace(/\.png$/, `-out-${Date.now()}-${i}.jpg`);
+      const timings = await m.decodeEncodeAsync(src, dst, 95);
+      console.error(
+        '[BENCH] run=' + i + ' jsRoundTripMs=' + (Date.now() - t0) +
+        ' decodeMs=' + timings.decodeMs + ' encodeWriteMs=' + timings.encodeWriteMs +
+        ' totalMs=' + timings.totalMs + ' pong=' + pong
       );
     }
-    console.log('[BENCH] done');
   } catch (e) {
     console.error('[BENCH] failed', e);
   }