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callcount

io.WriteString

standard library

The 338th most-called standard-library function by production calls. Called 4,838 times across 417 modules; 2,599 of those run outside tests and generated code.

1% in production calls vs 2026-W37 (2,569 → 2,599)

All of io → Docs on pkg.go.dev ↗

prod calls
2,599
non-test, non-generated
all calls
4,838
total callsites
modules
417
distinct callers
in loop
15%
of prod calls
in tests
46%
2,237 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 WriteString from notable Go projects. Open one on the map to see what else it hammers.

where it's called

Callsites in the wild

12 representative callsites of 4,838, prioritizing in-loop and non-test usage. We link to source, never display it.

WriteString · 12 of 4,838 callsites

top callers

The modules that reach for it

The modules that call WriteString most in this snapshot.

  • github.com/bytebase/bytebase79216%
  • github.com/opensearch-project/opensearch-go/v43267%
  • github.com/esengine/DeepSeek-Reasonix1894%
  • github.com/infiniflow/ragflow1874%
  • github.com/GoesToEleven/GolangTraining1794%

siblings

More from io

The other most-called functions in this package. See all →