You can run perftest-tools locally.
You can run mach perftest-tools in a mozilla-central source checkout:
$ ./mach perftest-tools side-by-side --help
The mach command will bootstrap the installation of all required dependencies for the side-by-side tool to run.
The following arguments are required: -t/--test-name, --base-revision, --new-revision, --base-platform
The --help argument will explain more about what arguments you need to run in order to use the tool.