Support global --profile?

[avamsi]

Might be neat.

[avamsi]

Or maybe --cpuprofile and --memprofile (see https://pkg.go.dev/runtime/pprof).

[avamsi]

A snippet I used elsewhere, for posterity --

assert.Nil(trace.Start(assert.Ok(os.Create("trace.out"))))
assert.Nil(pprof.StartCPUProfile(assert.Ok(os.Create("cpu.prof"))))
defer func() {
	trace.Stop()
	pprof.StopCPUProfile()

	runtime.GC()
	assert.Nil(pprof.Lookup("allocs").WriteTo(assert.Ok(os.Create("mem.prof")), 0))
}()