[Pkg-javascript-commits] [node-acorn-jsx] 435/484: Optimize JSX text reading.

[Bastien Roucariès]

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rouca pushed a commit to branch master
in repository node-acorn-jsx.

commit 95479ab6aa69bb4162500700ccebe359028aef70
Author: Ingvar Stepanyan <me at rreverser.com>
Date:   Tue Jan 27 16:51:45 2015 +0200

    Optimize JSX text reading.
---
 acorn.js | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/acorn.js b/acorn.js
index 1507882..2447814 100644
--- a/acorn.js
+++ b/acorn.js
@@ -1534,35 +1534,43 @@
   // Reads inline JSX contents token.
 
   function readJSXToken() {
-    var out = "", start = tokPos;
+    var out = "", chunkStart = tokPos;
     for (;;) {
       if (tokPos >= inputLen) raise(tokStart, "Unterminated JSX contents");
       var ch = input.charCodeAt(tokPos);
       switch (ch) {
         case 123: // '{'
         case 60: // '<'
-          if (tokPos === start) {
+          if (tokPos === tokStart) {
             return getTokenFromCode(ch);
           }
+          out += input.slice(chunkStart, tokPos);
           return finishToken(_jsxText, out);
 
         case 38: // '&'
+          out += input.slice(chunkStart, tokPos);
           out += readJSXEntity();
+          chunkStart = tokPos;
           break;
 
         default:
-          ++tokPos;
           if (isNewLine(ch)) {
+            out += input.slice(chunkStart, tokPos);
+            ++tokPos;
             if (ch === 13 && input.charCodeAt(tokPos) === 10) {
               ++tokPos;
-              ch = 10;
+              out += "\n";
+            } else {
+              out += String.fromCharCode(ch);
             }
             if (options.locations) {
               ++tokCurLine;
               tokLineStart = tokPos;
             }
+            chunkStart = tokPos;
+          } else {
+            ++tokPos;
           }
-          out += String.fromCharCode(ch);
       }
     }
   }

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