sync.RWMutex.RUnlock
standard libraryThe 55th most-called standard-library method by production calls. Called 23,571 times across 714 modules; 18,074 of those run outside tests and generated code.
- prod calls
- 18,074
- non-test, non-generated
- all calls
- 23,571
- total callsites
- modules
- 714
- distinct callers
- in loop
- 5%
- of prod calls
- in tests
- 9%
- 2,126 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 method82%A method on a value whose type is known exactly.
- Embedded method18%Reached through an embedded type.
- Method value<1%A method captured as a value, then called.
estimate
Estimated relative cost
Roughly 0.00× the estimated relative cost of fmt.Sprintf . Benchmarked at 3.94 ns/op × 18,074 production calls, normalized so fmt.Sprintf = 1.0.
This is not dollars and not a verdict. Per-op time depends heavily on inputs (argument sizes, contention, patterns), the benchmark ran on a single machine (darwin/arm64 (Apple Silicon), go1.26.0), and static call counts are not runtime frequency. How this is estimated →
who calls this
Notable callers
Production calls into RWMutex.RUnlock from notable Go projects. Open one on the map to see what else it hammers.
- Kubernetes 1,143 6%
- Grafana 885 5%
- NATS 856 5%
- InfluxDB 425 2%
- Cilium 413 2%
where it's called
Callsites in the wild
12 representative callsites of 23,571, prioritizing in-loop and non-test usage. We link to source, never display it.
- in loop
-
go/storage @v1.64.0
grpc_reader_multi_range.go:1360
in loop -
cockroachdb/cockroach @v19.2.12+incompatible
in loop -
miekg/dns @v0.6.90
cmd/atomdns/handlers/dbfile/retransfer.go:25
in loop - in loop
-
containerd/typeurl/v2 @v2.3.0
in loop - in loop
- in loop
-
moby/moby @v28.5.2+incompatible
in loop -
etcd-io/etcd @v2.3.8+incompatible
in loop -
fyne.io/fyne @v1.4.3
internal/driver/glfw/loop.go:127
in loop - in loop
top callers
The modules that reach for it
The modules that call RWMutex.RUnlock most in this snapshot.
- github.com/hyperledger/fabric2,0919%
- github.com/nats-io/nats-server/v21,4556%
- github.com/livekit/livekit1,2565%
- github.com/seaweedfs/seaweedfs6623%
- github.com/kubernetes/kubernetes5612%
siblings
More from sync
The other most-called members in this package. See all →