Benchmark: Markdown Performance Comparison January 2023

HTML Preparation code:

<script type="text/javascript" src="https://unpkg.com/showdown@2.1.0/dist/showdown.min.js"></script>
<script type="text/javascript" src="https://unpkg.com/marked@11.1.0/marked.min.js"></script>
<script type="text/javascript" src="https://unpkg.com/commonmark@0.30.0/dist/commonmark.min.js"></script>
<script type="text/javascript" src="https://unpkg.com/markdown-it@14.0.0/dist/markdown-it.min.js"></script>
<script type="text/javascript" src="https://unpkg.com/remarkable@2.0.1/dist/remarkable.min.js"></script>
<script type="text/javascript" src="https://unpkg.com/micromarkdown@0.3.4/dist/micromarkdown.min.js"></script>
<script type="text/javascript" src="https://unpkg.com/snarkdown@2.0.0/dist/snarkdown.umd.js"></script>
<script type="module">
  import {remark} from 'https://cdn.skypack.dev/remark@15?min'
  window.remark = remark;
</script>

Script Preparation code:

var conv = {
  showdown: new showdown.Converter(),
  marked: marked,
  cm: new commonmark.HtmlRenderer(),
  mdit: markdownit({ html: true }),
  remarkable: new remarkable.Remarkable(),
  micromarkdown: window.micromarkdown,
  snarkdown: window.snarkdown,
  remark: window.remark(),
};

var pars = {
  cm: new commonmark.Parser()
};

var md = [
		"---",
"__Advertisement :)__",
"",
"- __[pica](https://nodeca.github.io/pica/demo/)__ - high quality and fast image",
"  resize in browser.",
"- __[babelfish](https://github.com/nodeca/babelfish/)__ - developer friendly",
"  i18n with plurals support and easy syntax.",
"",
"You will like those projects!",
"",
"---",
"",
"# h1 Heading 8-)",
"## h2 Heading",
"### h3 Heading",
"#### h4 Heading",
"##### h5 Heading",
"###### h6 Heading",
"",
"",
"## Horizontal Rules",
"",
"___",
"",
"---",
"",
"***",
"",
"",
"## Typographic replacements",
"",
"Enable typographer option to see result.",
"",
"(c) (C) (r) (R) (tm) (TM) (p) (P) +-",
"",
"test.. test... test..... test?..... test!....",
"",
"!!!!!! ???? ,,  -- ---",
"",
"\"Smartypants, double quotes\" and 'single quotes'",
"",
"",
"## Emphasis",
"",
"**This is bold text**",
"",
"__This is bold text__",
"",
"*This is italic text*",
"",
"_This is italic text_",
"",
"~~Strikethrough~~",
"",
"",
"## Blockquotes",
"",
"",
"> Blockquotes can also be nested...",
">> ...by using additional greater-than signs right next to each other...",
"> > > ...or with spaces between arrows.",
"",
"",
"## Lists",
"",
"Unordered",
"",
"+ Create a list by starting a line with `+`, `-`, or `*`",
"+ Sub-lists are made by indenting 2 spaces:",
"  - Marker character change forces new list start:",
"    * Ac tristique libero volutpat at",
"    + Facilisis in pretium nisl aliquet",
"    - Nulla volutpat aliquam velit",
"+ Very easy!",
"",
"Ordered",
"",
"1. Lorem ipsum dolor sit amet",
"2. Consectetur adipiscing elit",
"3. Integer molestie lorem at massa",
"",
"",
"1. You can use sequential numbers...",
"1. ...or keep all the numbers as `1.`",
"",
"Start numbering with offset:",
"",
"57. foo",
"1. bar",
"",
"",
"## Code",
"",
"Inline `code`",
"",
"Indented code",
"",
"    // Some comments",
"    line 1 of code",
"    line 2 of code",
"    line 3 of code",
"",
"",
"Block code \"fences\"",
"",
"```",
"Sample text here...",
"```",
"",
"Syntax highlighting",
"",
"``` js",
"var foo = function (bar) {",
"  return bar++;",
"};",
"",
"console.log(foo(5));",
"```",
"",
"## Tables",
"",
"| Option | Description |",
"| ------ | ----------- |",
"| data   | path to data files to supply the data that will be passed into templates. |",
"| engine | engine to be used for processing templates. Handlebars is the default. |",
"| ext    | extension to be used for dest files. |",
"",
"Right aligned columns",
"",
"| Option | Description |",
"| ------:| -----------:|",
"| data   | path to data files to supply the data that will be passed into templates. |",
"| engine | engine to be used for processing templates. Handlebars is the default. |",
"| ext    | extension to be used for dest files. |",
"",
"",
"## Links",
"",
"[link text](http://dev.nodeca.com)",
"",
"[link with title](http://nodeca.github.io/pica/demo/ \"title text!\")",
"",
"Autoconverted link https://github.com/nodeca/pica (enable linkify to see)",
"",
"",
"## Images",
"",
"![Minion](https://octodex.github.com/images/minion.png)",
"![Stormtroopocat](https://octodex.github.com/images/stormtroopocat.jpg \"The Stormtroopocat\")",
"",
"Like links, Images also have a footnote style syntax",
"",
"![Alt text][id]",
"",
"With a reference later in the document defining the URL location:",
"",
"[id]: https://octodex.github.com/images/dojocat.jpg  \"The Dojocat\"",
"",
"",
"## Plugins",
"",
"The killer feature of `markdown-it` is very effective support of",
"[syntax plugins](https://www.npmjs.org/browse/keyword/markdown-it-plugin).",
"",
"",
"### [Emojies](https://github.com/markdown-it/markdown-it-emoji)",
"",
"> Classic markup: :wink: :crush: :cry: :tear: :laughing: :yum:",
">",
"> Shortcuts (emoticons): :-) :-( 8-) ;)",
"",
"see [how to change output](https://github.com/markdown-it/markdown-it-emoji#change-output) with twemoji.",
"",
"",
"### [Subscipt](https://github.com/markdown-it/markdown-it-sub) / [Superscirpt](https://github.com/markdown-it/markdown-it-sup)",
"",
"- 19^th^",
"- H~2~O",
"",
"",
"### [\<ins>](https://github.com/markdown-it/markdown-it-ins)",
"",
"++Inserted text++",
"",
"",
"### [\<mark>](https://github.com/markdown-it/markdown-it-mark)",
"",
"==Marked text==",
"",
"",
"### [Footnotes](https://github.com/markdown-it/markdown-it-footnote)",
"",
"Footnote 1 link[^first].",
"",
"Footnote 2 link[^second].",
"",
"Inline footnote^[Text of inline footnote] definition.",
"",
"Duplicated footnote reference[^second].",
"",
"[^first]: Footnote **can have markup**",
"",
"    and multiple paragraphs.",
"",
"[^second]: Footnote text.",
"",
"",
"### [Definition lists](https://github.com/markdown-it/markdown-it-deflist)",
"",
"Term 1",
"",
":   Definition 1",
"with lazy continuation.",
"",
"Term 2 with *inline markup*",
"",
":   Definition 2",
"",
"        { some code, part of Definition 2 }",
"",
"    Third paragraph of definition 2.",
"",
"_Compact style:_",
"",
"Term 1",
"  ~ Definition 1",
"",
"Term 2",
"  ~ Definition 2a",
"  ~ Definition 2b",
"",
"",
"### [Abbreviations](https://github.com/markdown-it/markdown-it-abbr)",
"",
"This is HTML abbreviation example.",
"",
"It converts \"HTML\", but keep intact partial entries like \"xxxHTMLyyy\" and so on.",
"",
"*[HTML]: Hyper Text Markup Language",
"---",
"__Advertisement :)__",
"",
"- __[pica](https://nodeca.github.io/pica/demo/)__ - high quality and fast image",
"  resize in browser.",
"- __[babelfish](https://github.com/nodeca/babelfish/)__ - developer friendly",
"  i18n with plurals support and easy syntax.",
"",
"You will like those projects!",
"",
"---",
"",
"# h1 Heading 8-)",
"## h2 Heading",
"### h3 Heading",
"#### h4 Heading",
"##### h5 Heading",
"###### h6 Heading",
"",
"",
"## Horizontal Rules",
"",
"___",
"",
"---",
"",
"***",
"",
"",
"## Typographic replacements",
"",
"Enable typographer option to see result.",
"",
"(c) (C) (r) (R) (tm) (TM) (p) (P) +-",
"",
"test.. test... test..... test?..... test!....",
"",
"!!!!!! ???? ,,  -- ---",
"",
"\"Smartypants, double quotes\" and 'single quotes'",
"",
"",
"## Emphasis",
"",
"**This is bold text**",
"",
"__This is bold text__",
"",
"*This is italic text*",
"",
"_This is italic text_",
"",
"~~Strikethrough~~",
"",
"",
"## Blockquotes",
"",
"",
"> Blockquotes can also be nested...",
">> ...by using additional greater-than signs right next to each other...",
"> > > ...or with spaces between arrows.",
"",
"",
"## Lists",
"",
"Unordered",
"",
"+ Create a list by starting a line with `+`, `-`, or `*`",
"+ Sub-lists are made by indenting 2 spaces:",
"  - Marker character change forces new list start:",
"    * Ac tristique libero volutpat at",
"    + Facilisis in pretium nisl aliquet",
"    - Nulla volutpat aliquam velit",
"+ Very easy!",
"",
"Ordered",
"",
"1. Lorem ipsum dolor sit amet",
"2. Consectetur adipiscing elit",
"3. Integer molestie lorem at massa",
"",
"",
"1. You can use sequential numbers...",
"1. ...or keep all the numbers as `1.`",
"",
"Start numbering with offset:",
"",
"57. foo",
"1. bar",
"",
"",
"## Code",
"",
"Inline `code`",
"",
"Indented code",
"",
"    // Some comments",
"    line 1 of code",
"    line 2 of code",
"    line 3 of code",
"",
"",
"Block code \"fences\"",
"",
"```",
"Sample text here...",
"```",
"",
"Syntax highlighting",
"",
"``` js",
"var foo = function (bar) {",
"  return bar++;",
"};",
"",
"console.log(foo(5));",
"```",
"",
"## Tables",
"",
"| Option | Description |",
"| ------ | ----------- |",
"| data   | path to data files to supply the data that will be passed into templates. |",
"| engine | engine to be used for processing templates. Handlebars is the default. |",
"| ext    | extension to be used for dest files. |",
"",
"Right aligned columns",
"",
"| Option | Description |",
"| ------:| -----------:|",
"| data   | path to data files to supply the data that will be passed into templates. |",
"| engine | engine to be used for processing templates. Handlebars is the default. |",
"| ext    | extension to be used for dest files. |",
"",
"",
"## Links",
"",
"[link text](http://dev.nodeca.com)",
"",
"[link with title](http://nodeca.github.io/pica/demo/ \"title text!\")",
"",
"Autoconverted link https://github.com/nodeca/pica (enable linkify to see)",
"",
"",
"## Images",
"",
"![Minion](https://octodex.github.com/images/minion.png)",
"![Stormtroopocat](https://octodex.github.com/images/stormtroopocat.jpg \"The Stormtroopocat\")",
"",
"Like links, Images also have a footnote style syntax",
"",
"![Alt text][id]",
"",
"With a reference later in the document defining the URL location:",
"",
"[id]: https://octodex.github.com/images/dojocat.jpg  \"The Dojocat\"",
"",
"",
"## Plugins",
"",
"The killer feature of `markdown-it` is very effective support of",
"[syntax plugins](https://www.npmjs.org/browse/keyword/markdown-it-plugin).",
"",
"",
"### [Emojies](https://github.com/markdown-it/markdown-it-emoji)",
"",
"> Classic markup: :wink: :crush: :cry: :tear: :laughing: :yum:",
">",
"> Shortcuts (emoticons): :-) :-( 8-) ;)",
"",
"see [how to change output](https://github.com/markdown-it/markdown-it-emoji#change-output) with twemoji.",
"",
"",
"### [Subscipt](https://github.com/markdown-it/markdown-it-sub) / [Superscirpt](https://github.com/markdown-it/markdown-it-sup)",
"",
"- 19^th^",
"- H~2~O",
"",
"",
"### [\<ins>](https://github.com/markdown-it/markdown-it-ins)",
"",
"++Inserted text++",
"",
"",
"### [\<mark>](https://github.com/markdown-it/markdown-it-mark)",
"",
"==Marked text==",
"",
"",
"### [Footnotes](https://github.com/markdown-it/markdown-it-footnote)",
"",
"Footnote 1 link[^first].",
"",
"Footnote 2 link[^second].",
"",
"Inline footnote^[Text of inline footnote] definition.",
"",
"Duplicated footnote reference[^second].",
"",
"[^first]: Footnote **can have markup**",
"",
"    and multiple paragraphs.",
"",
"[^second]: Footnote text.",
"",
"",
"### [Definition lists](https://github.com/markdown-it/markdown-it-deflist)",
"",
"Term 1",
"",
":   Definition 1",
"with lazy continuation.",
"",
"Term 2 with *inline markup*",
"",
":   Definition 2",
"",
"        { some code, part of Definition 2 }",
"",
"    Third paragraph of definition 2.",
"",
"_Compact style:_",
"",
"Term 1",
"  ~ Definition 1",
"",
"Term 2",
"  ~ Definition 2a",
"  ~ Definition 2b",
"",
"",
"### [Abbreviations](https://github.com/markdown-it/markdown-it-abbr)",
"",
"This is HTML abbreviation example.",
"",
"It converts \"HTML\", but keep intact partial entries like \"xxxHTMLyyy\" and so on.",
"",
"*[HTML]: Hyper Text Markup Language"].join("\n");

Tests:

Showdown.js
conv.showdown.makeHtml(md);
Marked
conv.marked.parse(md);
CommonMark
conv.cm.render(pars.cm.parse(md));
Markdown-it
conv.mdit.render(md);
Remarkable
conv.remarkable.render(md);
Micromarkdown
conv.micromarkdown.parse(md);
Snarkdown
conv.snarkdown(md);
Remark
conv.remark.processSync(md);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Showdown.js
Marked
CommonMark
Markdown-it
Remarkable
Micromarkdown
Snarkdown
Remark

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:121.0) Gecko/20100101 Firefox/121.0

Browser/OS: Firefox 121 on Ubuntu

View result in a separate tab

Remarkable

3K/s

Snarkdown

2K/s

CommonMark

2K/s

Markdown-it

2K/s

Marked

1K/s

Micromarkdown

1K/s

Showdown.js

374/s

Remark

105/s

View exact numbers

Test name	Executions per second
✓ Remarkable	2,915 Ops/sec
Snarkdown	2,187 Ops/sec
CommonMark	1,819 Ops/sec
Markdown-it	1,671 Ops/sec
Marked	1,448 Ops/sec
Micromarkdown	1,322 Ops/sec
Showdown.js	374 Ops/sec
Remark	105 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

LLMs can make mistakes. Check important info.

I'll provide the answer in the format requested, skipping the unnecessary text.

**Conv Benchmark Results**

### Test Cases

```
[
    {
        "Benchmark Definition": "conv.showdown.makeHtml(md);",
        "Test Name": "Showdown.js"
    },
    {
        "Benchmark Definition": "conv.marked.parse(md);",
        "Test Name": "Marked"
    },
    {
        "Benchmark Definition": "conv.cm.render(pars.cm.parse(md));",
        "Test Name": "CommonMark"
    },
    {
        "Benchmark Definition": "conv.mdit.render(md);",
        "Test Name": "Markdown-it"
    },
    {
        "Benchmark Definition": "conv.remarkable.render(md);",
        "Test Name": "Remarkable"
    },
    {
        "Benchmark Definition": "conv.micromarkdown.parse(md);",
        "Test Name": "Micromarkdown"
    },
    {
        "Benchmark Definition": "conv.snarkdown(md);",
        "Test Name": "Snarkdown"
    },
    {
        "Benchmark Definition": "conv.remark.processSync(md);",
        "Test Name": "Remark"
    }
]
```

### Latest Benchmark Result

```
[
    {
        "RawUAString": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:121.0) Gecko/20100101 Firefox/121.0",
        "Browser": "Firefox 121",
        "DevicePlatform": "Desktop",
        "OperatingSystem": "Ubuntu",
        "ExecutionsPerSecond": 2915.443359375,
        "TestName": "Remarkable"
    },
    {
        "RawUAString": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:121.0) Gecko/20100101 Firefox/121.0",
        "Browser": "Firefox 121",
        "DevicePlatform": "Desktop",
        "OperatingSystem": "Ubuntu",
        "ExecutionsPerSecond": 2187.36376953125,
        "TestName": "Snarkdown"
    },
    {
        "RawUAString": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:121.0) Gecko/20100101 Firefox/121.0",
        "Browser": "Firefox 121",
        "DevicePlatform": "Desktop",
        "OperatingSystem": "Ubuntu",
        "ExecutionsPerSecond": 1819.208984375,
        "TestName": "CommonMark"
    },
    {
        "RawUAString": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:121.0) Gecko/20100101 Firefox/121.0",
        "Browser": "Firefox 121",
        "DevicePlatform": "Desktop",
        "OperatingSystem": "Ubuntu",
        "ExecutionsPerSecond": 1670.716064453125,
        "TestName": "Markdown-it"
    },
    {
        "RawUAString": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:121.0) Gecko/20100101 Firefox/121.0",
        "Browser": "Firefox 121",
        "DevicePlatform": "Desktop",
        "OperatingSystem": "Ubuntu",
        "ExecutionsPerSecond": 1448.105224609375,
        "TestName": "Marked"
    },
    {
        "RawUAString": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:121.0) Gecko/20100101 Firefox/121.0",
        "Browser": "Firefox 121",
        "DevicePlatform": "Desktop",
        "OperatingSystem": "Ubuntu",
        "ExecutionsPerSecond": 1321.8226318359375,
        "TestName": "Micromarkdown"
    },
    {
        "RawUAString": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:121.0) Gecko/20100101 Firefox/121.0",
        "Browser": "Firefox 121",
        "DevicePlatform": "Desktop",
        "OperatingSystem": "Ubuntu",
        "ExecutionsPerSecond": 373.67822265625,
        "TestName": "Showdown.js"
    },
    {
        "RawUAString": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:121.0) Gecko/20100101 Firefox/121.0",
        "Browser": "Firefox 121",
        "DevicePlatform": "Desktop",
        "OperatingSystem": "Ubuntu",
        "ExecutionsPerSecond": 104.65116119384766,
        "TestName": "Remark"
    }
]
```

Markdown Performance Comparison January 2023 (version: 0) Benchmark.js

A performance comparison of leading Javascript Markdown implementations.

Comparing performance of: `Showdown.js vs Marked vs CommonMark vs Markdown-it vs Remarkable vs Micromarkdown vs Snarkdown vs Remark`

Created: 2 years ago by: Registered User

Go to the latest result

Showdown.js

Marked

CommonMark

Markdown-it

Remarkable

Micromarkdown

Snarkdown

Remark

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

Markdown Performance Comparison January 2023 (version: 0) Benchmark.js

A performance comparison of leading Javascript Markdown implementations.

Comparing performance of: Showdown.js vs Marked vs CommonMark vs Markdown-it vs Remarkable vs Micromarkdown vs Snarkdown vs Remark

Created: 2 years ago by: Registered User

Go to the latest result

Showdown.js

Marked

CommonMark

Markdown-it

Remarkable

Micromarkdown

Snarkdown

Remark

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

Related benchmarks

Comparing performance of: `Showdown.js vs Marked vs CommonMark vs Markdown-it vs Remarkable vs Micromarkdown vs Snarkdown vs Remark`