From e24608ffe14acd62508dc894ff4e77b19d825575 Mon Sep 17 00:00:00 2001
From: steveluscher <me+github@steveluscher.com>
Date: Thu, 13 Apr 2023 05:04:21 +0000
Subject: [PATCH] Improve decoding performance

This yields a performance improvement over indexing into `source` over and over. `source` is asserted to be a string, `psz` is monotonically increasing, and `psz >= source.length` is a good indication that you've run out of characters.

Originally proposed by @oscxc in #74.
---
 src/index.js    | 2 +-
 ts_src/index.ts | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/index.js b/src/index.js
index 11e1a13..3f4bcab 100644
--- a/src/index.js
+++ b/src/index.js
@@ -80,7 +80,7 @@ function base (ALPHABET) {
     var size = (((source.length - psz) * FACTOR) + 1) >>> 0 // log(58) / log(256), rounded up.
     var b256 = new Uint8Array(size)
         // Process the characters.
-    while (source[psz]) {
+    while (psz < source.length) {
             // Decode character
       var carry = BASE_MAP[source.charCodeAt(psz)]
             // Invalid character
diff --git a/ts_src/index.ts b/ts_src/index.ts
index 2e71501..8c91160 100644
--- a/ts_src/index.ts
+++ b/ts_src/index.ts
@@ -99,7 +99,7 @@ function base (ALPHABET: string): base.BaseConverter {
     const b256 = new Uint8Array(size)
 
     // Process the characters.
-    while (source[psz]) {
+    while (psz < source.length) {
       // Decode character
       let carry = BASE_MAP[source.charCodeAt(psz)]