RSS Feed/News CSS delivery from cache is inefficient

[ENXF NET]

If configured and possible, XenForo stores rendered CSS in a cache using the configured provider (Memcached, Redis, etc.) in \XF\CssRenderer::cacheFinalOutput
PHP:

protected function cacheFinalOutput(array $templates, $output)
{
        if (!is_string($output) || !strlen($output))
        {
                return;
        }

if ($this->allowCached && $this->allowFinalCacheUpdate && $this->cache && $this->includeExtraParams)
        {...

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