[4.1.x] Update Partial Rendering - #1052
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The jakarta.faces.partial.render / .execute request parameters (and the jakarta.faces.source parameter) were split into client ids without any limit on the number or length of the ids. PartialVisitContext then retained one prefix substring per naming-container separator of each id, so a single very long id was expensive to process. Cap the parsed list to 256 ids of at most 256 chars each, collapse duplicates, and bound the naming-container depth registered per id in PartialVisitContext so that work stays linear in the id length. Update Partial Context comments
UIViewRoot.encodeChildren triggered partial rendering whenever PartialViewContext.isAjaxRequest() was true, even for a request without a jakarta.faces.ViewState. Such a request is not a postback and is not restoring a view, so additionally require FacesContext.isPostback() before partial-rendering; otherwise fall back to a normal render. Update UIViewRoot comments
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