Crossbench is a cross-browser/cross-benchmark runner to extract performance numbers.
This project uses poetry deps and package scripts to setup the correct environment for testing and debugging.
pip3 install poetry
poetry run crossbench speedometer_2.0 \
--browser=/path/to/chromium \
--stories=VanillaJS.* \
--probe=profiling \
--probe=v8.log
Crossbench supports running benchmarks on one or multiple browser configurations. The main implementation uses selenium for maximum system independence.
You can specify a single browser with --browser=<name>
poetry run crossbench speedometer_2.0 \
--browser=/path/to/chromium \
-- \
--browser-flag-foo \
--browser-flag-bar \
For more complex scenarios you can use a browser.config.hjson file. It allows you to specify multiple browser and multiple flag configurations in a single file and produce performance numbers with a single invocation.
poetry run crossbench speedometer_2.0 \
--browser-config=config.hjson
The example file lists and explains all configuration details.
Probes define a way to extract arbitrary (performance) numbers from a host or running browser. This can reach from running simple JS-snippets to extract page-specific numbers to system-wide profiling.
Multiple probes can be added with repeated --probe=XXX options. You can use the describe subcommand to list all probes:
poetry run crossbench describe probes
Use the describe command to list all benchmark details:
poetry run crossbench describe benchmarks
Stories define sequences of browser interactions. This can be simply loading a URL and waiting for a given period of time, or in more complex scenarios, actively interact with a page and navigate multiple times.
Use --help or describe to list all stories for a benchmark:
poetry run crossbench speedometer_2.0 --help
Use --stories to list individual comma-separated story names, or use a regular expression as filter.
poetry run crossbench speedometer_2.0 \
--browser=/path/to/chromium \
--stories=VanillaJS.*