$ fastly compute serve --help
USAGE
  fastly compute serve [<flags>]

Build and run a Compute@Edge package locally

OPTIONAL FLAGS
  --addr="127.0.0.1:7676"      The IPv4 address and port to listen on
  --env=ENV                    The environment configuration to use (e.g. stage)
  --file="bin/main.wasm"       The Wasm file to run
  --include-source             Include source code in built package
  --language=LANGUAGE          Language type
  --package-name=PACKAGE-NAME  Package name
  --profile-guest              Profile the Wasm guest under Viceroy. View
                               profiles at https://profiler.firefox.com/.
  --profile-guest-dir=PROFILE-GUEST-DIR
                               The directory where the per-request profiles are
                               saved to. Defaults to guest-profiles.
  --skip-build                 Skip the build step
  --timeout=TIMEOUT            Timeout, in seconds, for the build compilation
                               step
  --viceroy-check              Force the CLI to check for a newer version of the
                               Viceroy binary
  --viceroy-path=VICEROY-PATH  The path to a user installed version of the
                               Viceroy binary
  --watch                      Watch for file changes, then rebuild project and
                               restart local server
  --watch-dir=WATCH-DIR        The directory to watch files from (can be
                               relative or absolute). Defaults to current
                               directory.
...

$ fastly compute serve --profile-guest 
✓ Verifying fastly.toml
✓ Identifying package name
✓ Identifying toolchain
✓ Running [scripts.build]
✓ Creating package archive

SUCCESS: Built package (pkg/name.tar.gz)

✓ Running local server

INFO: Listening on http://127.0.0.1:7676

INFO: Command output:
--------------------------------------------------------------------------------
2023-09-22T09:31:30.760443Z  WARN no backend definitions found in /Users/guest/fastly.toml
2023-09-22T09:31:30.760652Z  INFO Listening on http://127.0.0.1:7676
2023-09-22T09:31:33.691697Z  INFO request{id=0}: handling request GET http://localhost:7676/
FASTLY_SERVICE_VERSION:
2023-09-22T09:31:33.693562Z  INFO request{id=0}:
Profile written to: guest-profiles/1695375093-0.json
View this profile at https://profiler.firefox.com/.
2023-09-22T09:31:33.693573Z  INFO request{id=0}: request completed using 1.4 MB of WebAssembly heap
2023-09-22T09:31:33.693600Z  INFO request{id=0}: request completed in 2ms