log.SetFlags
standard libraryThe 1847th most-called standard-library function by production calls. Called 423 times across 167 modules; 336 of those run outside tests and generated code.
No change in production calls since 2026-W37.
- prod calls
- 336
- non-test, non-generated
- all calls
- 423
- total callsites
- modules
- 167
- distinct callers
- in loop
- <1%
- of prod calls
- in tests
- 21%
- 87 calls
- resolved
- 100%
- to a known target
resolution mix
How each call resolves
How each call was attributed. Only resolved kinds, where the target function is known, count toward the ranking. Interface dispatch and unresolved receivers are reported separately and never guessed. Read the taxonomy →
- Package function100%A direct call to an exported package function, resolved by type.
who calls this
Notable callers
Production calls into SetFlags from notable Go projects. Open one on the map to see what else it hammers.
- Go (golang.org/x) 42 13%
- Tailscale 28 8%
- NATS 11 3%
- Kubernetes 8 2%
- Uber Go 7 2%
where it's called
Callsites in the wild
12 representative callsites of 423, prioritizing in-loop and non-test usage. We link to source, never display it.
- in loop
-
tailscale/tailscale @v1.102.4
in loop -
tailscale.com @v1.102.4
tstest/mts/mts.go:179
in loop - in loop test
-
packethost/packngo @v0.31.0
in loop test - in loop test
-
packethost/packngo @v0.31.0
in loop test -
go/protovalidate @v1.4.0
internal/cmd/protovalidate-conformance-go/main.go:41
-
CCTV/age @v0.0.0-20260829155415-4448f2097b2d
internal/generate.go:21
-
-
-
top callers
The modules that reach for it
The modules that call SetFlags most in this snapshot.
- github.com/tailscale/tailscale307%
- tailscale.com307%
- golang.org/x/tools297%
- github.com/u-root/u-root174%
- github.com/olivere/elastic133%
siblings
More from log
The other most-called functions in this package. See all →