From: Chris Duncan <chris@codecow.com>
Date: Thu, 2 Jul 2026 15:40:34 +0000 (-0700)
Subject: Refactor bytes-to-hex converter to eliminate function call overhead for big performan... 
X-Git-Url: https://git.codecow.com/?a=commitdiff_plain;h=08694358bb58258c972ef62b79ec05aaa69338f1;p=libnemo.git

Refactor bytes-to-hex converter to eliminate function call overhead for big performance boost.
---

diff --git a/src/lib/constants.ts b/src/lib/constants.ts
index 7889cb2..1706e69 100644
--- a/src/lib/constants.ts
+++ b/src/lib/constants.ts
@@ -12,6 +12,7 @@ export const BURN_PUBLIC_KEY = '000000000000000000000000000000000000000000000000
 export const DIFFICULTY_RECEIVE = 0xfffffe0000000000n
 export const DIFFICULTY_SEND = 0xfffffff800000000n
 export const HARDENED_OFFSET = 0x80000000
+export const HEXCHAR = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F']
 export const MAX_RAW = 0xFFFF_FFFF_FFFF_FFFF_FFFF_FFFF_FFFF_FFFFn
 export const MAX_SUPPLY = 133_248_297_920_938_463_463_374_607_431_768_211_455n
 export const NONCE_LENGTH = 24
diff --git a/src/lib/convert/bytes.ts b/src/lib/convert/bytes.ts
index acb6031..52e2d95 100644
--- a/src/lib/convert/bytes.ts
+++ b/src/lib/convert/bytes.ts
@@ -1,7 +1,7 @@
 //! SPDX-FileCopyrightText: 2025 Chris Duncan <chris@codecow.com>
 //! SPDX-License-Identifier: GPL-3.0-or-later
 
-import { ALPHABET } from '../constants'
+import { ALPHABET, HEXCHAR } from '../constants'
 
 const decoder: TextDecoder = new TextDecoder()
 
@@ -76,11 +76,11 @@ export const bytes = Object.freeze({
 	 */
 	toHex (bytes: ArrayBuffer | Uint8Array): string {
 		if (bytes instanceof ArrayBuffer) bytes = new Uint8Array(bytes)
-		if (bytes.buffer instanceof ArrayBuffer && bytes.buffer.byteLength === 0) return ''
-		return [...bytes]
-			.map(byte => byte.toString(16).padStart(2, '0'))
-			.join('')
-			.toUpperCase()
+		let hex: string = ''
+		for (const byte of bytes) {
+			hex += HEXCHAR[byte >> 4] + HEXCHAR[byte & 15]
+		}
+		return hex
 	},
 
 	/**