OCD

OCD analyzes Dune trace files and compares builds to surface time, GC and resource changes. This currently supports Dune version 3.21.1 only. Planning to support majority.

Installation

Using Nix:

# Check it out
nix run github:briheet/ocd

# Try before installing
nix run github:briheet/ocd -- analyze trace.json

# Install
nix profile install github:briheet/ocd

Using Cargo:

cargo install --path .

Requirements

• A Dune trace generated with --trace-file

Quick start

dune build --trace-file trace.json
ocd analyze trace.json

Compare one or more builds against the first trace:

ocd diff baseline.json candidate.json
ocd diff baseline.json candidate-a.json candidate-b.json

Commands

Command	Purpose
analyze [trace.json]	Summarize one trace
diff <baseline> <candidates...>	Compare traces against a baseline