os.File.ReadAt
standard libraryThe 3904th most-called standard-library method by production calls. Called 221 times across 74 modules; 157 of those run outside tests and generated code.
1% in production calls vs 2026-W39 (156 → 157)
- prod calls
- 157
- non-test, non-generated
- all calls
- 221
- total callsites
- modules
- 74
- distinct callers
- in loop
- 30%
- of prod calls
- in tests
- 29%
- 64 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 method98%A method on a value whose type is known exactly.
- Embedded method2%Reached through an embedded type.
who calls this
Notable callers
Production calls into File.ReadAt from notable Go projects. Open one on the map to see what else it hammers.
- etcd 10 6%
- Dgraph 4 3%
- Kubernetes 4 3%
- NATS 4 3%
- containerd 3 2%
where it's called
Callsites in the wild
12 representative callsites of 221, prioritizing in-loop and non-test usage. We link to source, never display it.
-
moby/moby @v28.5.2+incompatible
in loop -
go.etcd.io/bbolt @v1.5.0
db.go:407
in loop - in loop
- in loop
-
benbjohnson/litestream @v0.5.17
in loop - in loop
- in loop
- in loop
- in loop
- in loop
- in loop
-
sagernet/bbolt @v0.0.0-20231014093535-ea5cb2fe9f0a
in loop
top callers
The modules that reach for it
The modules that call File.ReadAt most in this snapshot.
- github.com/seaweedfs/seaweedfs4319%
- github.com/u-root/u-root136%
- github.com/ethereum/go-ethereum115%
- github.com/diskfs/go-diskfs105%
- github.com/benbjohnson/litestream84%
siblings
More from os
The other most-called members in this package. See all →