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quicktemplate

MITGo

A fast, powerful, and easy-to-use template engine for Go that compiles templates to Go code for optimal performance.

What is quicktemplate?

QuickTemplate is a template engine for Go that compiles templates directly into Go code for maximum performance. It solves the problem of slow template rendering in web applications by generating optimized Go functions, resulting in up to 20x faster execution compared to standard libraries like html/template. It supports HTML, JSON, and XML generation with built-in security features.

Target Audience

Go developers building high-performance web applications, APIs, or services that require fast template rendering, such as server-side HTML generation, JSON/XML marshalling, or dynamic content generation.

Value Proposition

Developers choose QuickTemplate for its exceptional speed, compile-time error checking, and familiar Go-like syntax. Its unique selling point is the compilation of templates to Go code, enabling zero memory allocations in hot paths and seamless integration with existing Go tooling.

Overview

Fast, powerful, yet easy to use template engine for Go. Optimized for speed, zero memory allocations in hot paths. Up to 20x faster than html/template

Use Cases

Best For

High-performance HTML generation in Go web servers

Related Projects

Community-curated · Updated weekly · 100% open source

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3.3k stars148 forks0 contributors

Fast JSON or XML marshalling without reflection overhead

Building web applications with server-side rendering

Generating dynamic content with minimal latency

Projects requiring compile-time template validation

Embedding templates into a single binary for deployment

Not Ideal For

Applications requiring live template updates without server restarts or recompilation
Teams with large, existing codebases deeply integrated with standard html/template syntax
Projects where template complexity is low and the performance boost doesn't justify the extra build step
Environments where Go toolchain access is restricted, preventing the use of the qtc compiler

Pros & Cons

Pros

Extreme Performance Gains

Benchmarks show it's over 20x faster than html/template with zero memory allocations in hot paths, as demonstrated in performance tests with detailed ns/op and allocs/op metrics.

Go-like Syntax Familiarity

Uses a syntax very close to Go, minimizing learning curve for Go developers, allowing them to leverage existing language knowledge without learning a new template language.

Compile-time Error Checking

Catches almost all bugs during template compilation, reducing runtime failures and improving reliability, which is a core feature highlighted in the README.

Powerful Template Inheritance

Supports inheritance via Go interfaces, enabling flexible and reusable template structures, as shown in examples like the basicserver for complex page layouts.

Cons

No Hot Reloading

Templates are compiled into the binary and cannot be updated on the fly without recompilation, a admitted drawback that limits dynamic template management in production.

Additional Compilation Step

Requires running the separate qtc compiler tool, adding complexity to build processes and development workflows compared to drop-in libraries like html/template.

Limited Ecosystem Adoption

Less widely used than standard html/template, resulting in fewer community plugins, integrations, and third-party resources, which can hinder troubleshooting and scalability.

Frequently Asked Questions

Home

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#fast

#server-side-rendering