-Zself-profile compiler flag enables rustc's internal profiler.
When enabled, the compiler will output three binary files in the specified directory (or the current working directory if no directory is specified).
These files can be analyzed by using the tools in the
To control the data recorded in the trace files, use the
First, run a compilation session and provide the
$ rustc --crate-name foo -Zself-profile
This will generate three files in the working directory such as:
foo is the name of the crate and
1234 is the process id of the rustc process.
To get a summary of where the compiler is spending its time:
$ ../measureme/target/release/summarize summarize foo-1234
To generate a flamegraph of the same data:
$ ../measureme/target/release/inferno foo-1234
To dump the event data in a Chromium-profiler compatible format:
$ ../measureme/target/release/crox foo-1234
For more information, consult the