net/http.CanonicalHeaderKey
standard libraryThe 1804th most-called standard-library function by production calls. Called 728 times across 132 modules; 344 of those run outside tests and generated code.
1% in production calls vs 2026-W37 (342 → 344)
- prod calls
- 344
- non-test, non-generated
- all calls
- 728
- total callsites
- modules
- 132
- distinct callers
- in loop
- 47%
- of prod calls
- in tests
- 51%
- 370 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 CanonicalHeaderKey from notable Go projects. Open one on the map to see what else it hammers.
- Kubernetes 24 7%
- MinIO 24 7%
- Docker 17 5%
- Traefik 17 5%
- Grafana 14 4%
where it's called
Callsites in the wild
12 representative callsites of 728, prioritizing in-loop and non-test usage. We link to source, never display it.
-
connectrpc.com/connect @v1.21.0
protocol_connect.go:895
in loop -
connectrpc.com/otelconnect @v0.9.0
option.go:241
in loop -
moby/buildkit @v0.33.0
in loop -
encr.dev @v1.58.6
internal/httpcache/httpcache.go:122
in loop -
Azure/azure-sdk-for-go @v68.0.0+incompatible
in loop -
Azure/go-autorest/autorest @v0.11.30
preparer.go:150
in loop - in loop
- in loop
-
apernet/quic-go @v0.62.0
in loop - in loop
-
aws/aws-sdk-go-v2/service/s3 @v1.113.1
serializers.go:507
in loop - in loop
top callers
The modules that reach for it
The modules that call CanonicalHeaderKey most in this snapshot.
- github.com/baidubce/bce-sdk-go9713%
- github.com/grafana/dskit507%
- github.com/IBM/ibm-cos-sdk-go497%
- github.com/aws/aws-sdk-go497%
- github.com/Azure/go-autorest/autorest304%
siblings
More from net/http
The other most-called functions in this package. See all →