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CPU architecture (x86_64, ARM)

The CPU architecture is the family of processors your server runs on. Each family understands its own kind of machine code. On web servers, the two common ones are x86_64 (also called amd64) and ARM, shown as aarch64 or arm64.

Why it matters

Section titled “Why it matters”

WordPress itself is written in PHP and runs on any architecture that PHP runs on. The architecture matters for compiled software: PHP itself, its extensions and any programs on the server must be built for it. That’s usually the hosting provider’s job, but it can surface when a plugin needs a special PHP extension or ships a helper program of its own.

The architecture says nothing about speed on its own. A modern ARM server can be faster or slower than an x86_64 server, depending on the processor and how many of them your site gets.

What influences it

Section titled “What influences it”

Server: The processors in the hosting provider’s machines, or the type of virtual server you chose. Some providers offer both families, often at different prices.

In Permo

Section titled “In Permo”

The architecture is in System info, tab Server & System, as a note on the web server card, after the operating system: the name PHP reports, such as x86_64 or aarch64. Permo doesn’t rate it.

Section titled “Related”

Sources