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callcount

bytes.Buffer.Len

standard library

The 406th most-called standard-library method by production calls. Called 5,129 times across 589 modules; 2,214 of those run outside tests and generated code.

0% in production calls vs 2026-W39 (2,212 → 2,214)

All of bytes → Docs on pkg.go.dev ↗

prod calls
2,214
non-test, non-generated
all calls
5,129
total callsites
modules
589
distinct callers
in loop
24%
of prod calls
in tests
51%
2,639 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 Buffer.Len 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 5,129, prioritizing in-loop and non-test usage. We link to source, never display it.

Buffer.Len · 12 of 5,129 callsites

top callers

The modules that reach for it

The modules that call Buffer.Len most in this snapshot.

  • github.com/minio/minio4579%
  • github.com/elastic/go-elasticsearch/v82545%
  • github.com/larksuite/cli2154%
  • github.com/parquet-go/parquet-go1493%
  • github.com/klauspost/compress1052%

siblings

More from bytes

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