1.9 KiB
1.9 KiB
Lighthouse Metrics Analysis
Online at https://googlechrome.github.io/lighthouse/plots/
For context and roadmap, please see issue: https://github.com/GoogleChrome/lighthouse/issues/1924
Workflow
Setup
You need to build lighthouse first.
Generating & viewing charts
# Run lighthouse to collect metrics data
$ node measure.js
# OR if you want to specify an out directory
$ node measure.js --out out-123
# Analyze the data to generate a summary file (i.e. out-hello/generated-results.js)
# This will launch the charts web page in the browser
# node analyze.js {out_directory}
$ node analyze.js ./out-hello
# Generate dashboard using a parent folder with multiple batch results
$ node generate-dashboard.js out-parent-folder
# Or you can specify each batch result explicitly
$ node generate-dashboard.js out-1 out-2 out-3
Advanced usage
$ node measure.js --help
node measure.js [options]
Lighthouse settings:
--disable-device-emulation Disable Nexus 5X emulation [boolean]
Options to specify sites:
--sites-path Include relative path of a json file with urls to run [default: "sites.js"]
--subset Measure a subset of popular sites
--site Include a specific site url to run
Options:
--help Show help [boolean]
--out Custom out path
-n Number of runs per site [default: 3]
--reuse-chrome Reuse the same Chrome instance across all site runs
--keep-first-run If you use --reuse-chrome, by default the first run results are discarded
Examples:
node measure.js -n 3 --sites-path ./sample-sites.json
node measure.js --site https://google.com/
node measure.js --subset