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| partials.IncludeCached | partialCached | Allows for caching of partials that do not need to be re-rendered on every invocation. |
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The partialCached template function can offer significant performance gains for complex templates that don't need to be re-rendered on every invocation.
Note: Each Site (or language) has its own partialCached cache, so each site will execute a partial once.
Note: Hugo renders pages in parallel, and will render the partial more than once with concurrent calls to the partialCached function. After Hugo caches the rendered partial, new pages entering the build pipeline will use the cached result.
Here is the simplest usage:
{{ partialCached "footer.html" . }}
You can also pass additional arguments to partialCached to create variants of the cached partial. For example, if you have a complex partial that should be identical when rendered for pages within the same section, you could use a variant based upon section so that the partial is only rendered once per section:
{{< code file="partial-cached-example.html" >}} {{ partialCached "footer.html" . .Section }} {{< /code >}}
If you need to pass additional arguments to create unique variants, you can pass as many variant arguments as you need:
{{ partialCached "footer.html" . .Params.country .Params.province }}
Note that the variant arguments are not made available to the underlying partial template. They are only use to create a unique cache key. Since Hugo 0.61.0 you can use any object as cache key(s), not just strings.
See also The Full Partial Series Part 1: Caching!.