<p></p>
<p dir="auto">Example of slow request</p>
<p dir="auto"><code class="notranslate">https://api.openstreetmap.org/api/0.6/changesets.json?limit=10&time=20200501T000000Z&order=oldest</code></p>
<p dir="auto">It probably goes through almost the entire created_at index because there's no condition created_at. The lower bound is checked only on closed_at. In the fix I added a condition that skips changesets that are definitely too old to be open at the lower bound (2 * max age).</p>

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