hyperbuild

A fast one-pass in-place HTML minifier written in Rust with advanced whitespace handling.

Currently in beta, working on documentation and tests. Issues and pull requests welcome!

Features

• Minification is done in one pass with no backtracking or DOM/AST building.
• No dynamic memory is allocated during processing, which increases safety and performance.
• Advanced whitespace handling options allow maximum minification while retaining valid spaces.

Usage

TODO

Minification

Guide below is currently WIP.

Whitespace

hyperbuild has advanced whitespace minification that can allow strategies such as:

• leave whitespace untouched in pre and code, which are whitespace sensitive
• trim and collapse whitespace in content tags, as whitespace is collapsed anyway when rendered
• remove whitespace in layout tags, which allows the use of inline layouts while keeping formatted code

Beginning and end

<p>↵
··The·quick·brown·fox↵
</p>

Between text and tags

<p>The·quick·brown·fox·<strong>jumps</strong>·over·the·lazy·dog.</p>

Contiguous

<select>↵
··<option>Jan:·········1</option>↵
··<option>Feb:········10</option>↵
··<option>Mar:·······100</option>↵
··<option>Apr:······1000</option>↵
··<option>May:·····10000</option>↵
··<option>Jun:····100000</option>↵
</select>

Whole text

<p>↵
···↵
</p>

Tag classification

Type	Content
Formatting tags	Text nodes
Content tags	Formatting tags, text nodes
Layout tags	Layout tags, content tags
Content-first tags	Content of content tags or layout tags (but not both)

Specific tags

Tags not in one of the categories below are specific tags.

Formatting tags

<strong> moat </strong>

Content tags

<p>Some <strong>content</strong></p>

Content-first tags

<li>Anthony</li>

<li>
  <div>
  </div>
</li>

Layout tags

<div>
  <div></div>
</div>

Development

Currently, hyperbuild has a few limitations:

• Only UTF-8 is supported.
• Not aware of exotic Unicode whitespace characters.
• Follows HTML5 only.
• Only works on Linux.

Patches to change any of these welcome!