Various performance improvements

benchmark/benchloop.js

@@ -0,0 +1,37 @@
+
+'use strict';
+
+/* IMPORT */
+
+var fs = require ('fs'),
+    path = require ('path'),
+    benchmark = require ('benchloop'),
+    mit = require ('..');
+
+/* HELPERS */
+
+var SAMPLES_PATH = path.join (__dirname, 'samples');
+var md = mit ('commonmark');
+
+/* BENCHMARK */
+
+benchmark.defaultOptions = Object.assign (benchmark.defaultOptions, {
+  iterations: 50,
+  log: 'compact'
+});
+
+fs.readdirSync (SAMPLES_PATH).forEach (function (sample) {
+
+  var samplePath = path.join (SAMPLES_PATH, sample),
+      content = fs.readFileSync (samplePath, 'utf-8');
+
+  benchmark ({
+    name: sample,
+    fn: function () {
+      md.render (content);
+    }
+  });
+
+});
+
+benchmark.summary ();

benchmark/profile.js

@@ -14,6 +14,8 @@ var md = require('../')({
 // var data = fs.readFileSync(path.join(__dirname, '/samples/lorem1.txt'), 'utf8');
 var data = fs.readFileSync(path.join(__dirname, '../test/fixtures/commonmark/spec.txt'), 'utf8');
 
-for (var i = 0; i < 20; i++) {
+console.time('profile');
+for (var i = 0; i < 200; i++) {
   md.render(data);
 }
+console.timeEnd('profile');

lib/common/utils.js

@@ -13,6 +13,14 @@ function has(object, key) {
   return _hasOwnProperty.call(object, key);
 }
 
+var _repeat = String.prototype.repeat || function (count) {
+  return new Array(count + 1).join (this);
+};
+
+function repeat(str, count) {
+  return _repeat.call (str, count);
+}
+
 // Merge objects
 //
 function assign(obj /*from1, from2, from3, ...*/) {
@@ -237,7 +245,7 @@ function isMdAsciiPunct(ch) {
   }
 }
 
-// Hepler to unify [reference labels].
+// Helper to unify [reference labels].
 //
 function normalizeReference(str) {
   // Trim and collapse whitespace
@@ -302,6 +310,7 @@ exports.lib.ucmicro         = require('uc.micro');
 exports.assign              = assign;
 exports.isString            = isString;
 exports.has                 = has;
+exports.repeat              = repeat;
 exports.unescapeMd          = unescapeMd;
 exports.unescapeAll         = unescapeAll;
 exports.isValidEntityCode   = isValidEntityCode;

lib/renderer.js

@@ -44,9 +44,14 @@ default_rules.fence = function (tokens, idx, options, env, slf) {
       highlighted, i, arr, tmpAttrs, tmpToken;
 
   if (info) {
-    arr = info.split(/(\s+)/g);
-    langName = arr[0];
-    langAttrs = arr.slice(2).join('');
+    if (!/\s/.test (info)) {
+      langName = info;
+      langAttrs = '';
+    } else {
+      arr = info.split(/(\s+)/g);
+      langName = arr[0];
+      langAttrs = arr.slice(2).join('');
+    }
   }
 
   if (options.highlight) {
@@ -55,7 +60,7 @@ default_rules.fence = function (tokens, idx, options, env, slf) {
     highlighted = escapeHtml(token.content);
   }
 
-  if (highlighted.indexOf('<pre') === 0) {
+  if (highlighted.slice(0, 4) === '<pre') {
     return highlighted + '\n';
   }
 
@@ -63,12 +68,12 @@ default_rules.fence = function (tokens, idx, options, env, slf) {
   // May be, one day we will add .deepClone() for token and simplify this part, but
   // now we prefer to keep things local.
   if (info) {
-    i        = token.attrIndex('class');
-    tmpAttrs = token.attrs ? token.attrs.slice() : [];
+    i = token.attrIndex('class');
 
     if (i < 0) {
-      tmpAttrs.push([ 'class', options.langPrefix + langName ]);
+      tmpAttrs = [ [ 'class', options.langPrefix + langName ] ];
     } else {
+      tmpAttrs = token.attrs.slice();
       tmpAttrs[i] = tmpAttrs[i].slice();
       tmpAttrs[i][1] += ' ' + options.langPrefix + langName;
     }
@@ -78,6 +83,12 @@ default_rules.fence = function (tokens, idx, options, env, slf) {
       attrs: tmpAttrs
     };
 
+    if (i < 0) {
+      return  '<pre><code' + slf.renderAttrs(token) + slf.renderAttrs(tmpToken) + '>'
+            + highlighted
+            + '</code></pre>\n';
+    }
+
     return  '<pre><code' + slf.renderAttrs(tmpToken) + '>'
           + highlighted
           + '</code></pre>\n';
@@ -293,13 +304,17 @@ Renderer.prototype.renderInline = function (tokens, options, env) {
  * instead of simple escaping.
  **/
 Renderer.prototype.renderInlineAsText = function (tokens, options, env) {
-  var result = '';
+  var type, token,
+      result = '';
 
   for (var i = 0, len = tokens.length; i < len; i++) {
-    if (tokens[i].type === 'text') {
-      result += tokens[i].content;
-    } else if (tokens[i].type === 'image') {
-      result += this.renderInlineAsText(tokens[i].children, options, env);
+    token = tokens[i];
+    type = token.type;
+
+    if (type === 'text') {
+      result += token.content;
+    } else if (type === 'image') {
+      result += this.renderInlineAsText(token.children, options, env);
     }
   }
 
@@ -317,17 +332,18 @@ Renderer.prototype.renderInlineAsText = function (tokens, options, env) {
  * this method directly.
  **/
 Renderer.prototype.render = function (tokens, options, env) {
-  var i, len, type,
+  var i, len, type, token,
       result = '',
       rules = this.rules;
 
   for (i = 0, len = tokens.length; i < len; i++) {
-    type = tokens[i].type;
+    token = tokens[i];
+    type = token.type;
 
     if (type === 'inline') {
-      result += this.renderInline(tokens[i].children, options, env);
+      result += this.renderInline(token.children, options, env);
     } else if (typeof rules[type] !== 'undefined') {
-      result += rules[tokens[i].type](tokens, i, options, env, this);
+      result += rules[type](tokens, i, options, env, this);
     } else {
       result += this.renderToken(tokens, i, options, env);
     }

lib/rules_block/blockquote.js

@@ -6,6 +6,9 @@ var isSpace = require('../common/utils').isSpace;
 
 
 module.exports = function blockquote(state, startLine, endLine, silent) {
+  // if it's indented more than 3 spaces, it should be a code block
+  if (state.sCount[startLine] - state.blkIndent >= 4) { return false; }
+
   var adjustTab,
       ch,
       i,
@@ -30,9 +33,6 @@ module.exports = function blockquote(state, startLine, endLine, silent) {
       pos = state.bMarks[startLine] + state.tShift[startLine],
       max = state.eMarks[startLine];
 
-  // if it's indented more than 3 spaces, it should be a code block
-  if (state.sCount[startLine] - state.blkIndent >= 4) { return false; }
-
   // check the block quote marker
   if (state.src.charCodeAt(pos++) !== 0x3E/* > */) { return false; }
 

lib/rules_block/code.js

@@ -4,10 +4,10 @@
 
 
 module.exports = function code(state, startLine, endLine/*, silent*/) {
-  var nextLine, last, token;
-
   if (state.sCount[startLine] - state.blkIndent < 4) { return false; }
 
+  var nextLine, last, token;
+
   last = nextLine = startLine + 1;
 
   while (nextLine < endLine) {

lib/rules_block/fence.js

@@ -4,14 +4,14 @@
 
 
 module.exports = function fence(state, startLine, endLine, silent) {
+  // if it's indented more than 3 spaces, it should be a code block
+  if (state.sCount[startLine] - state.blkIndent >= 4) { return false; }
+
   var marker, len, params, nextLine, mem, token, markup,
       haveEndMarker = false,
       pos = state.bMarks[startLine] + state.tShift[startLine],
       max = state.eMarks[startLine];
 
-  // if it's indented more than 3 spaces, it should be a code block
-  if (state.sCount[startLine] - state.blkIndent >= 4) { return false; }
-
   if (pos + 3 > max) { return false; }
 
   marker = state.src.charCodeAt(pos);

lib/rules_block/heading.js

@@ -6,13 +6,13 @@ var isSpace = require('../common/utils').isSpace;
 
 
 module.exports = function heading(state, startLine, endLine, silent) {
+  // if it's indented more than 3 spaces, it should be a code block
+  if (state.sCount[startLine] - state.blkIndent >= 4) { return false; }
+
   var ch, level, tmp, token,
       pos = state.bMarks[startLine] + state.tShift[startLine],
       max = state.eMarks[startLine];
 
-  // if it's indented more than 3 spaces, it should be a code block
-  if (state.sCount[startLine] - state.blkIndent >= 4) { return false; }
-
   ch  = state.src.charCodeAt(pos);
 
   if (ch !== 0x23/* # */ || pos >= max) { return false; }

lib/rules_block/hr.js

@@ -3,16 +3,17 @@
 'use strict';
 
 var isSpace = require('../common/utils').isSpace;
+var repeat = require('../common/utils').repeat;
 
 
 module.exports = function hr(state, startLine, endLine, silent) {
+  // if it's indented more than 3 spaces, it should be a code block
+  if (state.sCount[startLine] - state.blkIndent >= 4) { return false; }
+
   var marker, cnt, ch, token,
       pos = state.bMarks[startLine] + state.tShift[startLine],
       max = state.eMarks[startLine];
 
-  // if it's indented more than 3 spaces, it should be a code block
-  if (state.sCount[startLine] - state.blkIndent >= 4) { return false; }
-
   marker = state.src.charCodeAt(pos++);
 
   // Check hr marker
@@ -39,7 +40,7 @@ module.exports = function hr(state, startLine, endLine, silent) {
 
   token        = state.push('hr', 'hr', 0);
   token.map    = [ startLine, state.line ];
-  token.markup = Array(cnt + 1).join(String.fromCharCode(marker));
+  token.markup = repeat (String.fromCharCode(marker), cnt);
 
   return true;
 };

lib/rules_block/html_block.js

@@ -21,14 +21,14 @@ var HTML_SEQUENCES = [
 
 
 module.exports = function html_block(state, startLine, endLine, silent) {
-  var i, nextLine, token, lineText,
-      pos = state.bMarks[startLine] + state.tShift[startLine],
-      max = state.eMarks[startLine];
+  if (!state.md.options.html) { return false; }
 
   // if it's indented more than 3 spaces, it should be a code block
   if (state.sCount[startLine] - state.blkIndent >= 4) { return false; }
 
-  if (!state.md.options.html) { return false; }
+  var i, nextLine, token, lineText,
+      pos = state.bMarks[startLine] + state.tShift[startLine],
+      max = state.eMarks[startLine];
 
   if (state.src.charCodeAt(pos) !== 0x3C/* < */) { return false; }
 

lib/rules_block/lheading.js

@@ -4,13 +4,13 @@
 
 
 module.exports = function lheading(state, startLine, endLine/*, silent*/) {
+  // if it's indented more than 3 spaces, it should be a code block
+  if (state.sCount[startLine] - state.blkIndent >= 4) { return false; }
+
   var content, terminate, i, l, token, pos, max, level, marker,
       nextLine = startLine + 1, oldParentType,
       terminatorRules = state.md.block.ruler.getRules('paragraph');
 
-  // if it's indented more than 3 spaces, it should be a code block
-  if (state.sCount[startLine] - state.blkIndent >= 4) { return false; }
-
   oldParentType = state.parentType;
   state.parentType = 'paragraph'; // use paragraph to match terminatorRules
 

lib/rules_block/list.js

@@ -11,7 +11,6 @@ function skipBulletListMarker(state, startLine) {
   var marker, pos, max, ch;
 
   pos = state.bMarks[startLine] + state.tShift[startLine];
-  max = state.eMarks[startLine];
 
   marker = state.src.charCodeAt(pos++);
   // Check bullet
@@ -21,6 +20,8 @@ function skipBulletListMarker(state, startLine) {
     return -1;
   }
 
+  max = state.eMarks[startLine];
+
   if (pos < max) {
     ch = state.src.charCodeAt(pos);
 
@@ -84,13 +85,14 @@ function skipOrderedListMarker(state, startLine) {
 }
 
 function markTightParagraphs(state, idx) {
-  var i, l,
+  var i, l, token,
       level = state.level + 2;
 
   for (i = idx + 2, l = state.tokens.length - 2; i < l; i++) {
-    if (state.tokens[i].level === level && state.tokens[i].type === 'paragraph_open') {
+    token = state.tokens[i];
+    if (token.level === level && token.type === 'paragraph_open') {
       state.tokens[i + 2].hidden = true;
-      state.tokens[i].hidden = true;
+      token.hidden = true;
       i += 2;
     }
   }
@@ -98,6 +100,21 @@ function markTightParagraphs(state, idx) {
 
 
 module.exports = function list(state, startLine, endLine, silent) {
+  // if it's indented more than 3 spaces, it should be a code block
+  if (state.sCount[startLine] - state.blkIndent >= 4) { return false; }
+
+  // Special case:
+  //  - item 1
+  //   - item 2
+  //    - item 3
+  //     - item 4
+  //      - this one is a paragraph continuation
+  if (state.listIndent >= 0 &&
+    state.sCount[startLine] - state.listIndent >= 4 &&
+    state.sCount[startLine] < state.blkIndent) {
+    return false;
+  }
+
   var ch,
       contentStart,
       i,
@@ -129,21 +146,6 @@ module.exports = function list(state, startLine, endLine, silent) {
       isTerminatingParagraph = false,
       tight = true;
 
-  // if it's indented more than 3 spaces, it should be a code block
-  if (state.sCount[startLine] - state.blkIndent >= 4) { return false; }
-
-  // Special case:
-  //  - item 1
-  //   - item 2
-  //    - item 3
-  //     - item 4
-  //      - this one is a paragraph continuation
-  if (state.listIndent >= 0 &&
-      state.sCount[startLine] - state.listIndent >= 4 &&
-      state.sCount[startLine] < state.blkIndent) {
-    return false;
-  }
-
   // limit conditions when list can interrupt
   // a paragraph (validation mode only)
   if (silent && state.parentType === 'paragraph') {

lib/rules_block/reference.js

@@ -6,6 +6,9 @@ var isSpace              = require('../common/utils').isSpace;
 
 
 module.exports = function reference(state, startLine, _endLine, silent) {
+  // if it's indented more than 3 spaces, it should be a code block
+  if (state.sCount[startLine] - state.blkIndent >= 4) { return false; }
+
   var ch,
       destEndPos,
       destEndLineNo,
@@ -27,9 +30,6 @@ module.exports = function reference(state, startLine, _endLine, silent) {
       max = state.eMarks[startLine],
       nextLine = startLine + 1;
 
-  // if it's indented more than 3 spaces, it should be a code block
-  if (state.sCount[startLine] - state.blkIndent >= 4) { return false; }
-
   if (state.src.charCodeAt(pos) !== 0x5B/* [ */) { return false; }
 
   // Simple check to quickly interrupt scan on [link](url) at the start of line.

lib/rules_block/state_block.js

@@ -4,6 +4,7 @@
 
 var Token = require('../token');
 var isSpace = require('../common/utils').isSpace;
+var repeat = require('../common/utils').repeat;
 
 
 function StateBlock(src, md, env, tokens) {
@@ -173,15 +174,14 @@ StateBlock.prototype.skipCharsBack = function skipCharsBack(pos, code, min) {
 
 // cut lines range from source.
 StateBlock.prototype.getLines = function getLines(begin, end, indent, keepLastLF) {
-  var i, lineIndent, ch, first, last, queue, lineStart,
+  var i, lineIndent, ch, first, last, lineStart,
+      lines = '',
       line = begin;
 
   if (begin >= end) {
-    return '';
+    return lines;
   }
 
-  queue = new Array(end - begin);
-
   for (i = 0; line < end; line++, i++) {
     lineIndent = 0;
     lineStart = first = this.bMarks[line];
@@ -215,13 +215,13 @@ StateBlock.prototype.getLines = function getLines(begin, end, indent, keepLastLF
     if (lineIndent > indent) {
       // partially expanding tabs in code blocks, e.g '\t\tfoobar'
       // with indent=2 becomes '  \tfoobar'
-      queue[i] = new Array(lineIndent - indent + 1).join(' ') + this.src.slice(first, last);
+      lines += repeat (' ', lineIndent - indent) + this.src.slice(first, last);
     } else {
-      queue[i] = this.src.slice(first, last);
+      lines += this.src.slice(first, last);
     }
   }
 
-  return queue.join('');
+  return lines;
 };
 
 // re-export Token class to use in block rules

lib/rules_block/table.js

@@ -50,20 +50,20 @@ function escapedSplit(str) {
 
 
 module.exports = function table(state, startLine, endLine, silent) {
-  var ch, lineText, pos, i, l, nextLine, columns, columnCount, token,
-      aligns, t, tableLines, tbodyLines, oldParentType, terminate,
-      terminatorRules;
-
   // should have at least two lines
   if (startLine + 2 > endLine) { return false; }
 
-  nextLine = startLine + 1;
+  var nextLine = startLine + 1;
 
   if (state.sCount[nextLine] < state.blkIndent) { return false; }
 
   // if it's indented more than 3 spaces, it should be a code block
   if (state.sCount[nextLine] - state.blkIndent >= 4) { return false; }
 
+  var ch, lineText, pos, i, l, columns, columnCount, token,
+      aligns, t, tableLines, tbodyLines, oldParentType, terminate,
+      terminatorRules;
+
   // first character of the second line should be '|', '-', ':',
   // and no other characters are allowed but spaces;
   // basically, this is the equivalent of /^[-:|][-:|\s]*$/ regexp

lib/rules_core/linkify.js

@@ -17,13 +17,13 @@ function isLinkClose(str) {
 
 
 module.exports = function linkify(state) {
+  if (!state.md.options.linkify) { return; }
+
   var i, j, l, tokens, token, currentToken, nodes, ln, text, pos, lastPos,
       level, htmlLinkLevel, url, fullUrl, urlText,
       blockTokens = state.tokens,
       links;
 
-  if (!state.md.options.linkify) { return; }
-
   for (j = 0, l = blockTokens.length; j < l; j++) {
     if (blockTokens[j].type !== 'inline' ||
         !state.md.linkify.pretest(blockTokens[j].content)) {

lib/rules_core/normalize.js

@@ -4,18 +4,21 @@
 
 
 // https://spec.commonmark.org/0.29/#line-ending
-var NEWLINES_RE  = /\r\n?|\n/g;
-var NULL_RE      = /\0/g;
+var CRLF_RE = /\r\n?/g;
 
 
 module.exports = function normalize(state) {
-  var str;
+  var src = state.src;
 
-  // Normalize newlines
-  str = state.src.replace(NEWLINES_RE, '\n');
+  // Normalize CRLF newlines
+  src = src.replace(CRLF_RE, '\n');
 
   // Replace NULL characters
-  str = str.replace(NULL_RE, '\uFFFD');
+  for (var i = 0, l = src.length; i < l; i++) {
+    if (!src.charCodeAt(i)) {
+      src = src.slice (0, i) + '\uFFFD' + src.slice (i + 1);
+    }
+  }
 
-  state.src = str;
+  state.src = src;
 };

lib/rules_core/smartquotes.js

@@ -26,7 +26,7 @@ function process_inlines(tokens, state) {
   for (i = 0; i < tokens.length; i++) {
     token = tokens[i];
 
-    thisLevel = tokens[i].level;
+    thisLevel = token.level;
 
     for (j = stack.length - 1; j >= 0; j--) {
       if (stack[j].level <= thisLevel) { break; }

lib/rules_inline/autolink.js

@@ -9,11 +9,11 @@ var AUTOLINK_RE = /^([a-zA-Z][a-zA-Z0-9+.\-]{1,31}):([^<>\x00-\x20]*)$/;
 
 
 module.exports = function autolink(state, silent) {
+  if (state.src.charCodeAt(state.pos) !== 0x3C/* < */) { return false; }
+
   var url, fullUrl, token, ch, start, max,
       pos = state.pos;
 
-  if (state.src.charCodeAt(pos) !== 0x3C/* < */) { return false; }
-
   start = state.pos;
   max = state.posMax;
 

lib/rules_inline/backticks.js

@@ -4,12 +4,13 @@
 
 
 module.exports = function backtick(state, silent) {
-  var start, max, marker, token, matchStart, matchEnd, openerLength, closerLength,
-      pos = state.pos,
-      ch = state.src.charCodeAt(pos);
+  var ch = state.src.charCodeAt(state.pos);
 
   if (ch !== 0x60/* ` */) { return false; }
 
+  var start, max, marker, token, matchStart, matchEnd, openerLength, closerLength,
+      pos = state.pos;
+
   start = pos;
   pos++;
   max = state.posMax;

lib/rules_inline/emphasis.js

@@ -6,14 +6,14 @@
 // Insert each marker as a separate text token, and add it to delimiter list
 //
 module.exports.tokenize = function emphasis(state, silent) {
-  var i, scanned, token,
-      start = state.pos,
-      marker = state.src.charCodeAt(start);
-
   if (silent) { return false; }
 
+  var marker = state.src.charCodeAt(state.pos);
+
   if (marker !== 0x5F /* _ */ && marker !== 0x2A /* * */) { return false; }
 
+  var i, scanned, token;
+
   scanned = state.scanDelims(state.pos, marker === 0x2A);
 
   for (i = 0; i < scanned.length; i++) {

lib/rules_inline/entity.js

@@ -13,9 +13,9 @@ var NAMED_RE   = /^&([a-z][a-z0-9]{1,31});/i;
 
 
 module.exports = function entity(state, silent) {
-  var ch, code, match, pos = state.pos, max = state.posMax;
+  if (state.src.charCodeAt(state.pos) !== 0x26/* & */) { return false; }
 
-  if (state.src.charCodeAt(pos) !== 0x26/* & */) { return false; }
+  var ch, code, match, pos = state.pos, max = state.posMax;
 
   if (pos + 1 < max) {
     ch = state.src.charCodeAt(pos + 1);

lib/rules_inline/escape.js

@@ -13,9 +13,9 @@ for (var i = 0; i < 256; i++) { ESCAPED.push(0); }
 
 
 module.exports = function escape(state, silent) {
-  var ch, pos = state.pos, max = state.posMax;
+  if (state.src.charCodeAt(state.pos) !== 0x5C/* \ */) { return false; }
 
-  if (state.src.charCodeAt(pos) !== 0x5C/* \ */) { return false; }
+  var ch, pos = state.pos, max = state.posMax;
 
   pos++;
 

lib/rules_inline/html_inline.js

@@ -14,18 +14,18 @@ function isLetter(ch) {
 
 
 module.exports = function html_inline(state, silent) {
-  var ch, match, max, token,
-      pos = state.pos;
-
   if (!state.md.options.html) { return false; }
 
   // Check start
-  max = state.posMax;
-  if (state.src.charCodeAt(pos) !== 0x3C/* < */ ||
-      pos + 2 >= max) {
+  var max = state.posMax;
+  if (state.src.charCodeAt(state.pos) !== 0x3C/* < */ ||
+      state.pos + 2 >= max) {
     return false;
   }
 
+  var ch, match, token,
+      pos = state.pos;
+
   // Quick fail on second char
   ch = state.src.charCodeAt(pos + 1);
   if (ch !== 0x21/* ! */ &&

lib/rules_inline/image.js

@@ -7,6 +7,9 @@ var isSpace              = require('../common/utils').isSpace;
 
 
 module.exports = function image(state, silent) {
+  if (state.src.charCodeAt(state.pos) !== 0x21/* ! */) { return false; }
+  if (state.src.charCodeAt(state.pos + 1) !== 0x5B/* [ */) { return false; }
+
   var attrs,
       code,
       content,
@@ -24,9 +27,6 @@ module.exports = function image(state, silent) {
       oldPos = state.pos,
       max = state.posMax;
 
-  if (state.src.charCodeAt(state.pos) !== 0x21/* ! */) { return false; }
-  if (state.src.charCodeAt(state.pos + 1) !== 0x5B/* [ */) { return false; }
-
   labelStart = state.pos + 2;
   labelEnd = state.md.helpers.parseLinkLabel(state, state.pos + 1, false);
 

lib/rules_inline/link.js

@@ -7,6 +7,8 @@ var isSpace              = require('../common/utils').isSpace;
 
 
 module.exports = function link(state, silent) {
+  if (state.src.charCodeAt(state.pos) !== 0x5B/* [ */) { return false; }
+
   var attrs,
       code,
       label,
@@ -23,8 +25,6 @@ module.exports = function link(state, silent) {
       start = state.pos,
       parseReference = true;
 
-  if (state.src.charCodeAt(state.pos) !== 0x5B/* [ */) { return false; }
-
   labelStart = state.pos + 1;
   labelEnd = state.md.helpers.parseLinkLabel(state, state.pos, true);
 

lib/rules_inline/newline.js

@@ -6,11 +6,13 @@ var isSpace = require('../common/utils').isSpace;
 
 
 module.exports = function newline(state, silent) {
-  var pmax, max, pos = state.pos;
+  if (state.src.charCodeAt(state.pos) !== 0x0A/* \n */) { return false; }
 
-  if (state.src.charCodeAt(pos) !== 0x0A/* \n */) { return false; }
+  var pmax, max,
+      pending = state.pending,
+      pos = state.pos;
 
-  pmax = state.pending.length - 1;
+  pmax = pending.length - 1;
   max = state.posMax;
 
   // '  \n' -> hardbreak
@@ -18,12 +20,12 @@ module.exports = function newline(state, silent) {
   // Pending string is stored in concat mode, indexed lookups will cause
   // convertion to flat mode.
   if (!silent) {
-    if (pmax >= 0 && state.pending.charCodeAt(pmax) === 0x20) {
-      if (pmax >= 1 && state.pending.charCodeAt(pmax - 1) === 0x20) {
-        state.pending = state.pending.replace(/ +$/, '');
+    if (pmax >= 0 && pending.charCodeAt(pmax) === 0x20) {
+      if (pmax >= 1 && pending.charCodeAt(pmax - 1) === 0x20) {
+        state.pending = pending.replace(/ +$/, '');
         state.push('hardbreak', 'br', 0);
       } else {
-        state.pending = state.pending.slice(0, -1);
+        state.pending = pending.slice(0, -1);
         state.push('softbreak', 'br', 0);
       }
 

lib/rules_inline/strikethrough.js

@@ -6,14 +6,14 @@
 // Insert each marker as a separate text token, and add it to delimiter list
 //
 module.exports.tokenize = function strikethrough(state, silent) {
-  var i, scanned, token, len, ch,
-      start = state.pos,
-      marker = state.src.charCodeAt(start);
-
   if (silent) { return false; }
 
+  var marker = state.src.charCodeAt(state.pos);
+
   if (marker !== 0x7E/* ~ */) { return false; }
 
+  var i, scanned, token, len, ch;
+
   scanned = state.scanDelims(state.pos, true);
   len = scanned.length;
   ch = String.fromCharCode(marker);

lib/rules_inline/text_collapse.js

@@ -10,26 +10,27 @@
 
 
 module.exports = function text_collapse(state) {
-  var curr, last,
+  var curr, last, token,
       level = 0,
       tokens = state.tokens,
-      max = state.tokens.length;
+      max = tokens.length;
 
   for (curr = last = 0; curr < max; curr++) {
+    token = tokens[curr];
     // re-calculate levels after emphasis/strikethrough turns some text nodes
     // into opening/closing tags
-    if (tokens[curr].nesting < 0) level--; // closing tag
-    tokens[curr].level = level;
-    if (tokens[curr].nesting > 0) level++; // opening tag
+    if (token.nesting < 0) level--; // closing tag
+    token.level = level;
+    if (token.nesting > 0) level++; // opening tag
 
-    if (tokens[curr].type === 'text' &&
+    if (token.type === 'text' &&
         curr + 1 < max &&
         tokens[curr + 1].type === 'text') {
 
       // collapse two adjacent text nodes
-      tokens[curr + 1].content = tokens[curr].content + tokens[curr + 1].content;
+      tokens[curr + 1].content = token.content + tokens[curr + 1].content;
     } else {
-      if (curr !== last) { tokens[last] = tokens[curr]; }
+      if (curr !== last) { tokens[last] = token; }
 
       last++;
     }

package.json

@@ -49,6 +49,7 @@
     "@rollup/plugin-node-resolve": "^10.0.0",
     "ansi": "^0.3.0",
     "autoprefixer-stylus": "^1.0.0",
+    "benchloop": "^1.3.2",
     "benchmark": "~2.1.0",
     "chai": "^4.2.0",
     "coveralls": "^3.0.4",