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callcount

github.com/stretchr/testify/require.Len

third-party

The 1367th most-called third-party function by production calls. Called 24,427 times across 311 modules; 454 of those run outside tests and generated code.

13% in production calls vs 2026-W37 (403 → 454)

All of github.com/stretchr/testify/require → Docs on pkg.go.dev ↗

prod calls
454
non-test, non-generated
all calls
24,427
total callsites
modules
311
distinct callers
in loop
7%
of prod calls
in tests
98%
23,972 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 function99%A direct call to an exported package function, resolved by type.
  • Package function (by syntax)<1%A package function in a module outside the crawl, keyed by import path.

who calls this

Notable callers

Production calls into 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 24,427, prioritizing in-loop and non-test usage. We link to source, never display it.

Len · 12 of 24,427 callsites

top callers

The modules that reach for it

The modules that call Len most in this snapshot.

  • github.com/weaviate/weaviate1,7487%
  • github.com/hashicorp/consul1,3676%
  • github.com/influxdata/telegraf9474%
  • github.com/cilium/cilium8664%
  • github.com/prometheus/prometheus8033%

siblings

More from github.com/stretchr/testify/require

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