From 689f8f504d03d47f184c45c85d0b3eb597fafe85 Mon Sep 17 00:00:00 2001
From: "Alex Lam S.L" <alexlamsl@gmail.com>
Date: Tue, 11 May 2021 16:41:32 +0100
Subject: enhance `mangle` (#4926)

---
 lib/scope.js | 15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)

(limited to 'lib')

diff --git a/lib/scope.js b/lib/scope.js
index f0d4c921..bb36583c 100644
--- a/lib/scope.js
+++ b/lib/scope.js
@@ -800,6 +800,7 @@ var base54 = (function() {
     var leading = init("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ$_");
     var chars, frequency;
     function reset() {
+        chars = null;
         frequency = Object.create(freq);
     }
     base54.consider = function(str, delta) {
@@ -811,19 +812,15 @@ var base54 = (function() {
         return frequency[b] - frequency[a];
     }
     base54.sort = function() {
-        chars = leading.sort(compare).concat(digits.sort(compare));
+        chars = leading.sort(compare).concat(digits).sort(compare);
     };
     base54.reset = reset;
     reset();
     function base54(num) {
-        var ret = "", base = 54;
-        num++;
-        do {
-            num--;
-            ret += chars[num % base];
-            num = Math.floor(num / base);
-            base = 64;
-        } while (num > 0);
+        var ret = leading[num % 54];
+        for (num = Math.floor(num / 54); --num >= 0; num >>= 6) {
+            ret += chars[num & 0x3F];
+        }
         return ret;
     }
     return base54;
-- 
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