The Linux 6.11 kernel introduced getrandom() in the vDSO for faster yet secure user-space random number generation needs . In addition to patches pending for Glibc to make use of getrandom() vDSO support , Golang is now another early user of this functionality.

Golang has merged support for using the vDSO for getrandom() on Linux when running on a supported kernel version and architecture. Open-source developer Jason Donenfeld who pursued the getrandom() vDSO support also worked on the Golang runtime support and the follow-up patch for using vDSO for getrandom() on Linux.

Indeed the noted performance gains are there for using vDSO for getrandom():