Template

In Search Of Performance

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In addition to the expressiveness of the template, the number of supported data types and functions and the expandability, performance is a decisive criterion for a template engine. FreshMarker only evaluates the template output at runtime, so although the template engine is very flexible, it cannot compete with those that evaluate the templates at compile time. For historical reasons, FreshMarker also has no upfront type information about the data used, so some optimization options are not available.

Comparison operators for Strings

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FreshMarker allows you to overload a wide variety of operators for your own model types. These operators are multiplication, addition, negation and comparison operators. For strings, the addition operator + has so far been overloaded to realize a string concatenation. In this blog post, we want to implement comparison operators for strings.

Optimize Switch for Constants

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The FreshMarker Switch Directive is an unusual representative of its kind. Since it has been implemented according to the possibilities of its syntax description in the CongoCC example source code, it is capable of quite unusual working methods. Some special cases could be processed faster with an optimized version. Therefore, the Switch Directive is optimized for constants in this article.

List Directive Unrolled

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The Partial Template Reduction feature allows FreshMarker templates to be simplified. Part of the model is used to evaluate expressions in directives and interpolations and generate a new template. A template reduced in this way contains fewer dynamic and more static parts and can therefore be evaluated more quickly. Until now, list directives were excluded from the simplification options. This can now change under certain circumstances.