From 3952e27d644623ab3dd3e940752a7fda07e5d2c3 Mon Sep 17 00:00:00 2001
From: SukkaW <isukkaw@gmail.com>
Date: Sun, 23 Feb 2025 22:32:11 +0800
Subject: [PATCH] Perf: improve file comparision

---
 Build/lib/create-file.ts | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/Build/lib/create-file.ts b/Build/lib/create-file.ts
index 8fda87b3..3beed226 100644
--- a/Build/lib/create-file.ts
+++ b/Build/lib/create-file.ts
@@ -14,6 +14,10 @@ export async function fileEqual(linesA: string[], source: AsyncIterable<string>
   const linesABound = linesA.length - 1;
 
   let index = -1;
+
+  let aLen = 0;
+  let bLen = 0;
+
   for await (const lineB of source) {
     index++;
 
@@ -22,9 +26,11 @@ export async function fileEqual(linesA: string[], source: AsyncIterable<string>
     }
 
     const lineA = linesA[index];
+    aLen = lineA.length;
+    bLen = lineB.length;
 
-    if (lineA.length === 0) {
-      if (lineB.length === 0) {
+    if (aLen === 0) {
+      if (bLen === 0) {
         // both lines are empty, check next line
         continue;
       }
@@ -32,7 +38,7 @@ export async function fileEqual(linesA: string[], source: AsyncIterable<string>
       return false;
     }
     // now lineA can not be empty
-    if (lineB.length === 0) {
+    if (bLen === 0) {
       // lineB is empty but lineA is not
       return false;
     }
@@ -63,6 +69,10 @@ export async function fileEqual(linesA: string[], source: AsyncIterable<string>
       continue;
     }
 
+    if (aLen !== bLen) {
+      return false;
+    }
+
     if (lineA !== lineB) {
       return false;
     }