cannot out flamegraph

[nneesshh]

1. if I add
   “
   [profile.dev]
   panic = "abort"
   ”
   to the Cargo.toml, the output flamegraph is nearly empty except a "all -> backtrace" call graph, without any my function name.

I wonder is it reasonably?

2. if I set frequency to 10, the output flamegraph.svg is always 0 bytes. But the flamegraph is ok for frequency(100). Is a limit for this value?