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Stan Hu authored
In Rails 5, including `ActionView::Context` can have a significant and hidden performance penalty because this module also includes `ActionView::CompiledTemplates`. This means that any module that includes ActionView::Context becomes a descendant of `CompiledTemplates`. When a partial is rendered for the first time, it runs `ActionView::CompiledTemplates#module_eval`, which will evaluate a string that defines a new method for that partial. For example, the source of partial might be this string: ``` def _app_views_project_show_html_haml___12345(local_assigns, output) "hello world" end ``` When this string is evaluated, the Ruby interpreter will define the method and clear the global method cache for all descendants of `ActionView::CompiledTemplates`. Previous to this change, we inadvertently made a number of modules fall into this category: * GroupChildEntity * NoteUserEntity * Notify * MergeRequestUserEntity * AnalyticsCommitEntity * CommitEntity *...
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