Using Julia on this branch:
GC.start_alloc_profile(100_000)
# code you wanna profile
file = open("my-profile.json", "w")
GC.stop_and_write_alloc_profile(file)
prof = AllocProfileParser.parse_alloc_profile("my-profile.json")
AllocProfileParser.to_pprof(prof)
You should see something like: