isabella232 / template-compiler

Java compiler for primary Squarespace template language

Squarespace Template Compiler.

A Java template compiler based on JSON-Template.

License: Apache 2.0 (summary)

Copyright (c) 2014 SQUARESPACE, Inc.

Overview

Squarespace's template language is based on JSON-Template, a minimal declarative template language for Python and JavaScript, heavily influenced by google-ctemplate.

Objectives

The project was started with these objectives:

• Move away from using Node.js for backend template compilation.
• Must meet or exceed performance of the legacy system. The compiler can potentially execute several times for each page view, so it needs to be really fast.
• Improve performance over the legacy system.
• Minimize memory usage. For example, parsing can often create and discard a high number of temporary strings.
• Support additional features for server-side compilation.
• High test coverage.
• Support syntax error recovery.
• Support a template validation mode.

Measured Results

• Average 20x performance increase over previous Node.js + JSON-Template system.