VPS latency: geography matters more than any optimisation

A technical brief published on 21 July by Contabo revisits a point that anyone configuring a VPS should keep in mind before touching a single line of code: the speed of light cannot be optimised. The physical distance between the data centre and the user imposes a floor on latency that no amount of server-side tuning can overcome, for all dynamic requests that cannot be served from cache.

The practical upshot, according to the document, is that the first step to addressing perceived high latency is often not "optimise the code" but "move the server closer".

Choosing the right region

The document proposes a simple criterion: identify the primary concentration of users and select the closest region, not the provider's default. For an audience on the US east coast, the recommendation is a region equivalent to New York; for the west coast, Seattle; for the centre, St. Louis; for western and central Europe, an EU hub; for the UK and Ireland, a dedicated UK data centre; for south-east Asia, Singapore. If your user base is split between the USA and Europe, there is no single-server solution: either accept the asymmetry in one of the two regions, or distribute instances across both and route traffic to the nearest.

Contabo's stated figures

For its own infrastructure, Contabo declares three active US regions — US East in New York, US West in Seattle, US Central in St. Louis — with declared ping times of up to 3 milliseconds to major North American cities. For Europe, the EU hub declares ping times of up to 4 milliseconds to major cities across the continent. UK and Singapore regions are also available.

In the regional coverage comparison presented, Hetzner covers the US (east), Germany and Finland; DigitalOcean covers more US and EU regions as well as Asia-Pacific and India; Vultr is described as having the broadest geographic coverage among the four providers cited.

Testing in practice

The document recommends not relying on a single test: run a ping from the target region for raw round-trip time, a traceroute to identify unusual hops on the path, and cross-check with a third-party service such as Speedtest by Ookla, repeating the measurement from multiple points within the same region — "US" can mean vastly different latencies between coasts and the centre of the country.

Region selection remains, in Contabo's offering, a checkbox choice at order time, not a separate product.