how_to_flamegraph.bash

# Pre-req:
# perf, rust, perl

# Enable debug in cargo
# 
# [profile.release]
# debug = true

# create benchmark binary with callgraph information
RUSTFLAGS="-g" cargo bench --features="bench" --no-run

# Record the benchmark with perf, pass arguments to Criterion (benchmark bloat). Try --help for (limited) options.
perf record -g target/release/bls381_benches-9a3877c5bcf3fbe7 verify_aggregate_128_same_msg
# this outputs a "perf.data" file

# Perl scripts for flamegraph creation from perf data can be downloaded with:
# git clone https://github.com/brendangregg/FlameGraph

# Convert the "perf.data" into an interactive flamegraph SVG
perf script | perl ../FlameGraph/stackcollapse-perf.pl | perl ../FlameGraph/flamegraph.pl > flame.svg

# Or read data in a tree-form in CLI
perf report