Improved performance of hBytes increment.

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Change Log
 
+## v0.7.1 / 2017-10-31
+### Improved
+- performance of hBytes increment.
+
 ## v0.7.0 / 2017-10-31
 ### Fixed
 - incorrect result when file size >= 512M.

bower.json

@@ -1,6 +1,6 @@
 {
   "name": "js-sha256",
-  "version": "0.7.0",
+  "version": "0.7.1",
   "main": ["src/sha256.js"],
   "ignore": [
     "samples",

package.json

@@ -1,6 +1,6 @@
 {
   "name": "js-sha256",
-  "version": "0.7.0",
+  "version": "0.7.1",
   "description": "A simple SHA-256 / SHA-224 hash function for JavaScript supports UTF-8 encoding.",
   "main": "src/sha256.js",
   "devDependencies": {

src/sha256.js

@@ -1,7 +1,7 @@
 /**
  * [js-sha256]{@link https://github.com/emn178/js-sha256}
  *
- * @version 0.7.0
+ * @version 0.7.1
  * @author Chen, Yi-Cyuan [emn178@gmail.com]
  * @copyright Chen, Yi-Cyuan 2014-2017
  * @license MIT
@@ -208,10 +208,6 @@
 
       this.lastByteIndex = i;
       this.bytes += i - this.start;
-      while (this.bytes > 4294967295) {
-        ++this.hBytes;
-        this.bytes -= 4294967296;
-      }
       if (i >= 64) {
         this.block = blocks[16];
         this.start = i - 64;
@@ -221,6 +217,10 @@
         this.start = i;
       }
     }
+    if (this.bytes > 4294967295) {
+      this.hBytes += this.bytes / 4294967296 << 0;
+      this.bytes = this.bytes % 4294967296;
+    }
     return this;
   };