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49 lines
2.1 KiB
Markdown
49 lines
2.1 KiB
Markdown
---
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title: partials.IncludeCached
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linkTitle: partialCached
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description: Allows for caching of partials that do not need to be re-rendered on every invocation.
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categories: [functions]
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keywords: []
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menu:
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docs:
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parent: functions
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function:
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aliases: [partialCached]
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returnType: any
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signatures: ['partials.IncludeCached LAYOUT CONTEXT [VARIANT...]']
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relatedFunctions:
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- partials.Include
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- partials.IncludeCached
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signatures:
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- partials.IncludeCached LAYOUT CONTEXT [VARIANT...]
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- partialCached LAYOUT CONTEXT [VARIANT...]
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aliases: [/functions/partialcached]
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---
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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.
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**Note:** Each Site (or language) has its own `partialCached` cache, so each site will execute a partial once.
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**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.
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Here is the simplest usage:
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```go-html-template
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{{ partialCached "footer.html" . }}
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```
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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:
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{{< code file="partial-cached-example.html" >}}
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{{ partialCached "footer.html" . .Section }}
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{{< /code >}}
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If you need to pass additional arguments to create unique variants, you can pass as many variant arguments as you need:
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```go-html-template
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{{ partialCached "footer.html" . .Params.country .Params.province }}
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```
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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.
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See also [The Full Partial Series Part 1: Caching!](https://regisphilibert.com/blog/2019/12/hugo-partial-series-part-1-caching-with-partialcached/).
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