The value returned can be inaccurate in some

rare virtualization cases. The issue arises when the virtualized

guest instance shares the kernel with the host system.

Due to the fact that libuv uses a syscall that

provides host's uptime instead of guest's

uptime on OpenVZ, `os.uptime()` may also provide

erroneous result.

Please refer to <https://github.com/nodejs/node/issues/36244> and

<https://github.com/libuv/libuv/issues/3068> for an exploration of

this issue, until it is resolved by libuv.