1# Using Wasmtime's cross-platform profiler 2 3The guest profiling strategy enables in-process sampling and will write the 4captured profile to a file which can be viewed at 5<https://profiler.firefox.com/>. 6 7To use this profiler with the Wasmtime CLI, pass the 8`--profile=guest[,path[,interval]]` flag. 9 10- `path` is where to write the profile, `wasmtime-guest-profile.json` by default 11- `interval` is the duration between samples, 10ms by default 12 13When used with `-W timeout=N`, the timeout will be rounded up to the nearest 14multiple of the profiling interval. 15