From 5b5767990bbe93a157bdb21dc221a5c83d9d090f Mon Sep 17 00:00:00 2001
From: SnapOtter <snapotter.hq@gmail.com>
Date: Mon, 11 May 2026 16:29:14 +0800
Subject: [PATCH] fix: tighten target-size compression tolerance from 5% to 1%

The binary search exited early at 5% tolerance, producing output like
48.3KB for a 50KB target. Reducing to 1% with 12 iterations makes the
output much closer to the requested target.
---
 packages/image-engine/src/operations/compress.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/packages/image-engine/src/operations/compress.ts b/packages/image-engine/src/operations/compress.ts
index bc3b2982..f84f65b4 100644
--- a/packages/image-engine/src/operations/compress.ts
+++ b/packages/image-engine/src/operations/compress.ts
@@ -58,8 +58,8 @@ async function findBestQuality(
   let low = 1;
   let high = 100;
   let bestQuality: number | null = null;
-  const maxIterations = 8;
-  const tolerance = 0.05;
+  const maxIterations = 12;
+  const tolerance = 0.01;
 
   for (let i = 0; i < maxIterations && low <= high; i++) {
     const mid = Math.min(100, Math.max(1, Math.round((low + high) / 2)));