search you tried in the issue tracker

I looked at the title of all open issues, and searched for "identify types" in open/closed issues

describe your actual problem

Consider the following .pre-commit-config.yaml:

repos:
  - repo: local
    hooks:
    - id: try
      name: try
      language: unsupported
      entry: 'true'
      types: []
      types_or: []
      exclude_types: []

combined with the binutils-gdb repo, a repo with 44782 files.

For this hook, types are not used so there's no need to call identify, but it still is.

If identify is called (without #3725), we have:

$ for f in $(seq 1 5); do \
      ( time pre-commit run try --all-files > /dev/null ) 2>&1 | grep real; \
    done
real    0m0,634s
real    0m0,641s
real    0m0,638s
real    0m0,643s
real    0m0,642s

And if identify is not called (with #3725) we have instead:

real    0m0,244s
real    0m0,242s
real    0m0,240s
real    0m0,244s
real    0m0,245s

pre-commit --version

4.6.0