How do you integrate performance tests into CI without bloating build time?

We want to add k6 performance tests to our CI pipeline but our PR pipeline is already 12 minutes and I don't want to make it longer. Options I see: 1. Run a short smoke performance test on PRs (low VUs, short duration, just checks nothing catastrophically broke) 2. Run full load tests only on merge to main (nightly or post-deploy) 3. Only run performance tests for PRs touching certain services Is a 2-minute smoke performance test in CI actually useful? Or does the limited load make it not representative enough to catch regressions?