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callcount

regexp.Regexp.FindString

standard library

The 1673rd most-called standard-library method by production calls. Called 430 times across 184 modules; 373 of those run outside tests and generated code.

0% in production calls vs 2026-W37 (372 → 373)

All of regexp → Docs on pkg.go.dev ↗

prod calls
373
non-test, non-generated
all calls
430
total callsites
modules
184
distinct callers
in loop
26%
of prod calls
in tests
13%
57 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 method100%A method on a value whose type is known exactly.

estimate

Experimental

Estimated relative cost

Roughly 0.00× the estimated relative cost of fmt.Sprintf . Benchmarked at 149.6 ns/op × 373 production calls, normalized so fmt.Sprintf = 1.0.

This is not dollars and not a verdict. Per-op time depends heavily on inputs (argument sizes, contention, patterns), the benchmark ran on a single machine (darwin/arm64 (Apple Silicon), go1.26.0), and static call counts are not runtime frequency. How this is estimated →

who calls this

Notable callers

Production calls into Regexp.FindString 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 430, prioritizing in-loop and non-test usage. We link to source, never display it.

Regexp.FindString · 12 of 430 callsites

top callers

The modules that reach for it

The modules that call Regexp.FindString most in this snapshot.

  • github.com/fish2018/pansou399%
  • github.com/bytebase/bytebase123%
  • github.com/photoprism/photoprism113%
  • github.com/gitleaks/gitleaks102%
  • github.com/go-playground/locales92%

siblings

More from regexp

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