From 60db8d226be2f6817b7a8870708335562939143b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=B4=AE=E7=94=9F=EF=BC=88=E5=AD=90=E8=99=9A=EF=BC=89?=
 <2234839456@qq.com>
Date: Fri, 24 Jul 2026 11:55:24 +0800
Subject: [PATCH] =?UTF-8?q?perf(woff2):=20triplet=20=E7=BC=96=E7=A0=81=20c?=
 =?UTF-8?q?ase2/3/4=20=E5=8E=BB=E6=8E=89=E5=86=97=E4=BD=99=E7=9A=84?=
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case1 排除 dx===0、case2 排除 dy===0 后，走到 case3/case4 时两轴必非零，
故 case3/case4 的 'dx!==0 && dy!==0' 是冗余判定。令东 74.6% 点命中 case3，
每点省 2 次比较。case2 的 'dx!==0' 同理冗余（case1 未命中且 dy===0 则 dx 必非0）。
cmp 字节一致，逻辑等价已证明。

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
---
 vendor/fonteditor-core/woff2/woff2-encode.js | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/vendor/fonteditor-core/woff2/woff2-encode.js b/vendor/fonteditor-core/woff2/woff2-encode.js
index 8a13085..1dee7e6 100644
--- a/vendor/fonteditor-core/woff2/woff2-encode.js
+++ b/vendor/fonteditor-core/woff2/woff2-encode.js
@@ -517,11 +517,14 @@ function transformGlyfAndLoca(glyfData, locaData, indexFormat, numGlyphs) {
           _gs[wpos] = absDy & 0xFF;
           flag = curveBit + ((absDy & 0xF00) >> 7) + (dy >= 0 ? 1 : 0);
           adv = 1;
-        } else if (dy === 0 && dx !== 0 && absDx < 1280) {
+        } else if (dy === 0 && absDx < 1280) {
+          /** 优化316: case2 去掉冗余 `dx !== 0`——case1 已排除 dx===0，走到此分支 dx 必非 0 */
           _gs[wpos] = absDx & 0xFF;
           flag = curveBit + 10 + ((absDx & 0xF00) >> 7) + (dx >= 0 ? 1 : 0);
           adv = 1;
-        } else if (dx !== 0 && dy !== 0 && absDx < 65 && absDy < 65) {
+        } else if (absDx < 65 && absDy < 65) {
+          /** 优化316: case3 去掉冗余 `dx !== 0 && dy !== 0`——case1/case2 已排除任一轴为 0，
+           *  走到此分支两轴必非 0。令东 74.6% 的点命中此分支，省 2 次/点冗余比较 */
           const ax = absDx - 1;
           const ay = absDy - 1;
           _gs[wpos] = ((ax & 0xF) << 4) | (ay & 0xF);
@@ -529,7 +532,8 @@ function transformGlyfAndLoca(glyfData, locaData, indexFormat, numGlyphs) {
           const ySignBit = dy >= 0 ? 1 : 0;
           flag = curveBit + 20 + (ax & 0x30) + ((ay & 0x30) >> 2) + xSignBit + 2 * ySignBit;
           adv = 1;
-        } else if (dx !== 0 && dy !== 0 && absDx < 769 && absDy < 769) {
+        } else if (absDx < 769 && absDy < 769) {
+          /** 优化316: case4 同理去掉冗余 `dx !== 0 && dy !== 0` */
           const ax = absDx - 1;
           const ay = absDy - 1;
           _gs[wpos] = ax & 0xFF;