net/http.Header.Set
standard libraryThe 58th most-called standard-library method by production calls. Called 72,731 times across 806 modules; 18,131 of those run outside tests and generated code.
1% in production calls vs 2026-W39 (18,022 → 18,131)
- prod calls
- 18,131
- non-test, non-generated
- all calls
- 72,731
- total callsites
- modules
- 806
- distinct callers
- in loop
- 5%
- of prod calls
- in tests
- 29%
- 21,041 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 →
- Concrete method100%A method on a value whose type is known exactly.
who calls this
Notable callers
Production calls into Header.Set from notable Go projects. Open one on the map to see what else it hammers.
- Kubernetes 388 2%
- VictoriaMetrics 380 2%
- MinIO 348 2%
- Tailscale 295 2%
- Grafana 293 2%
where it's called
Callsites in the wild
12 representative callsites of 72,731, prioritizing in-loop and non-test usage. We link to source, never display it.
- in loop
- in loop
- in loop
-
charm.land/catwalk @v0.52.57
cmd/cortecs/main.go:93
in loop -
charm.land/fantasy @v0.45.2
providers/google/call_useragent.go:66
in loop - in loop
-
go/storage @v1.68.0
http_client.go:1787
in loop -
cockroachdb/cockroach @v19.2.12+incompatible
in loop -
hashicorp/consul @v1.22.7
in loop - in loop
- in loop
-
moby/moby @v28.5.2+incompatible
in loop
top callers
The modules that reach for it
The modules that call Header.Set most in this snapshot.
- google.golang.org/api18,75426%
- github.com/volcengine/volcengine-go-sdk8,97212%
- github.com/byteplus-sdk/byteplus-go-sdk-v24,1676%
- github.com/elastic/go-elasticsearch/v81,9443%
- github.com/IBM/platform-services-go-sdk1,3072%
siblings
More from net/http
The other most-called members in this package. See all →