After setting up an LXC on my aging "core" router at home, starfire, I started thinking it might be time for an upgrade.  starfire has been a Celeron-based Dell Dimension 2350 with 4x Intel Gigabit Ethernet and 1x Broadcom Fast Ethernet NICs.  Rather than replacing the whole box, I figured it would be cost-effective to get a boost in performance by spending $23 on eBay and upgrading it to a Pentium 4 2.5 GHz CPU (SL6PN).

After the upgrade, transit latency dropped quite a bit:

Good enough.  Apt seems slight faster, too, although I suspect that's because of the larger L2 cache vs. clock speed.

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