loop-benchmarking

commit 6efe39f4df77be4a438d956fcbd95f2f401f54d4
parent 8dd7988310718f814aa96b5206b913e4b94b6491
Author: Brian Graham <brian@buildingbetterteams.de>
Date:   Tue,  7 Apr 2026 20:57:40 +0200

Fix falling piece detector: faster polling, longer settle time

- 5 frames at 200ms (was 3 at 800ms) for faster piece detection
- 1.5s post-trigger wait (was 300ms) to let overlays dismiss and
  first piece spawn before checking for downward movement

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Diffstat:
M
tasks/tetris/eval/gameplay-bot/calibrate.ts
 | 
12
++++++------

1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/tasks/tetris/eval/gameplay-bot/calibrate.ts b/tasks/tetris/eval/gameplay-bot/calibrate.ts
@@ -158,7 +158,7 @@ async function measureGridConfidence(
 }
 
 /**
- * Detect a falling piece by taking 3 screenshots ~800ms apart and looking
+ * Detect a falling piece by taking 5 screenshots ~200ms apart and looking
  * for a cluster of colored pixels that moved downward between frames.
  *
  * This works for canvas, DOM, SVG, WebGL -- any rendering approach.
@@ -173,8 +173,8 @@ async function measureGridConfidence(
 async function detectFallingPiece(page: Page): Promise<boolean> {
   const SAMPLE_COLS = 20;
   const SAMPLE_ROWS = 40;
-  const SCREENSHOTS = 3;
-  const INTERVAL_MS = 800;
+  const SCREENSHOTS = 5;
+  const INTERVAL_MS = 200;
   // Minimum downward shift in sample-grid rows to count as "falling"
   const MIN_DOWN_SHIFT = 1;
   // Cluster size bounds (roughly a tetromino: 3-6 sample points)
@@ -489,8 +489,8 @@ async function detectStartMechanism(page: Page): Promise<StartMechanism> {
   for (const trigger of triggers) {
     try {
       await trigger.action();
-      // Give the game a moment to react before checking for a falling piece
-      await page.waitForTimeout(300);
+      // Wait for overlay to dismiss and first piece to start falling
+      await page.waitForTimeout(1500);
 
       if (await detectFallingPiece(page)) {
         return trigger.name;
@@ -574,7 +574,7 @@ async function recalibrateWithRetry(
   for (const attempt of attempts) {
     try {
       await attempt.action();
-      await page.waitForTimeout(500);
+      await page.waitForTimeout(1500);
 
       // Use falling piece detector instead of screenshot comparison
       if (startMechanism === "unknown") {