 before but without
any requests flowing through Istio&rsquo;s Mixer.</p><h2 id=differences-with-mixer-based-generation>Differences with Mixer-based generation</h2><p>Small differences between the in-proxy generation and Mixer-based generation of service-level metrics
persist in Istio 1.3. We won&rsquo;t consider the functionality stable until in-proxy generation has full feature-parity with
Mixer-based generation.</p><p>Until then, please consider these differences:</p><ul><li>The <code>istio_request_durat