Question 1

How does fasttemplate compare to Go's text/template for speed?

Accepted Answer

fasttemplate is specifically optimized for placeholder substitution and benchmarks show it's much faster than text/template, making it ideal for performance-critical applications. However, it lacks the advanced features and safety mechanisms of text/template.

Question 2

Is fasttemplate safe for generating HTML without escaping?

Accepted Answer

No, fasttemplate doesn't perform any escaping, so you must manually escape values using functions like html.EscapeString to prevent XSS attacks when generating HTML. The README explicitly warns about this.

Question 3

Can I use loops or conditionals in fasttemplate templates?

Accepted Answer

fasttemplate doesn't support loops or conditionals natively; you need to handle such logic in your Go code and use custom tag handlers or pre-process the data before substitution, which can be more verbose.

Question 4

How to set custom delimiters like [ ] instead of {{ }} in fasttemplate?

Accepted Answer

You can specify custom delimiters when creating a template using fasttemplate.New(template, startTag, endTag), allowing flexibility to match different syntax preferences, as shown in the advanced usage example.

Question 5

When should I use fasttemplate over quicktemplate?

Accepted Answer

Use fasttemplate for simple placeholder substitution in non-HTML contexts where speed is critical, like configuration files or logs. Choose quicktemplate for HTML generation with built-in escaping and more template features, as mentioned in the README.

Question 6

What are the performance benchmarks for fasttemplate compared to strings.Replace?

Accepted Answer

According to the README benchmarks, fasttemplate is faster than strings.Replace, strings.Replacer, and fmt.Fprintf for placeholder substitution, with specific metrics like 349 ns/op for ExecuteFunc vs 3474 ns/op for strings.Replace.

fasttemplate

What is fasttemplate?

Overview

Use Cases

Best For

Related Projects

Found a gem we're missing?

Not Ideal For

Pros & Cons

Pros

Cons

Frequently Asked Questions