[wip] Rkuris/bumpalo

[rkuris]

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[github-actions]

Metrics Change Detection ⚠️

This PR contains changes related to metrics:

+        firewood_counter!("firewood.flush_nodes", "amount flushed nodes").increment(flush_time);
-        firewood_counter!("firewood.flush_nodes", "amount flushed nodes").increment(flush_time);

However, the dashboard was not modified.

You may need to update benchmark/Grafana-dashboard.json accordingly.

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This check is automated to help maintain the dashboard.