Flamingra.Docs

It will be (kind of) interactive (e.g. http://lelf.lu/files/pandoc.svg). .

TL;DR (and the only one available) guide:

some-program +RTS -P
wget https://raw.githubusercontent.com/brendangregg/FlameGraph/master/flamegrph.pl
flamingra some-program.prof | perl flamegraph.pl > picturesque.svg

Usage:

flamingra out.prof | …

or

… | flamingra | …

where out.prof is -P profiling output.