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2 Commits

Author SHA1 Message Date
Brad Fitzpatrick 7c1d6e35a5 all: use Go 1.22 range-over-int 
Updates #11058

Change-Id: I35e7ef9b90e83cac04ca93fd964ad00ed5b48430
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2024-04-16 15:32:38 -07:00
James Tucker d0f3fa7d7e util/fastuuid: add a more efficient uuid generator 
This still generates github.com/google/uuid UUID objects, but does so
using a ChaCha8 CSPRNG from the stdlib rand/v2 package. The public API
is backed by a sync.Pool to provide good performance in highly
concurrent operation.

Under high load the read API produces a lot of extra garbage and
overhead by way of temporaries and syscalls. This implementation reduces
both to minimal levels, and avoids any long held global lock by
utilizing sync.Pool.

Updates tailscale/corp#18266
Updates tailscale/corp#19054

Signed-off-by: James Tucker <james@tailscale.com>
 2024-04-09 14:05:20 -07:00