bytes.LastIndex
standard libraryThe 8528th most-called standard-library function by production calls. Called 72 times across 57 modules; 71 of those run outside tests and generated code.
3% in production calls vs 2026-W37 (69 → 71)
- prod calls
- 71
- non-test, non-generated
- all calls
- 72
- total callsites
- modules
- 57
- distinct callers
- in loop
- 31%
- of prod calls
- in tests
- 1%
- 1 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 LastIndex from notable Go projects. Open one on the map to see what else it hammers.
- Docker 5 7%
- Go (golang.org/x) 3 4%
- Grafana 3 4%
- Gitea 2 3%
- Istio 2 3%
where it's called
Callsites in the wild
12 representative callsites of 72, prioritizing in-loop and non-test usage. We link to source, never display it.
-
cilium/ebpf @v0.22.0
in loop - in loop
- in loop
-
gitea.dev @v1.27.3
modules/references/references.go:485
in loop - in loop
-
XTLS/Xray-core @v1.260327.0
in loop - in loop
-
coreos/go-systemd @v0.0.0-20191104093116-d3cd4ed1dbcf
in loop -
dop251/goja @v0.0.0-20260917113740-793a2a65c13b
in loop -
klauspost/compress @v1.20.0
in loop -
ledongthuc/pdf @v0.0.0-20260907135840-6c8c28e0e8a0
in loop - in loop
top callers
The modules that reach for it
The modules that call LastIndex most in this snapshot.
- github.com/PaloAltoNetworks/pango34%
- github.com/grafana/alloy34%
- gitea.dev23%
- github.com/IceWhaleTech/CasaOS23%
- github.com/docker/docker23%
siblings
More from bytes
The other most-called functions in this package. See all →