Documentation / Configuration
Configuration
Configuration
Sitespeed.io is highly configurable, let’s check it out!
The options #
You have the following options when running sitespeed.io within docker (run docker run sitespeedio/sitespeed.io:11.9.3 --help to get the list on your command line):
sitespeed.js [options] <url>/<file>
Browser
--browsertime.browser, -b, --browser Choose which Browser to use when you test. Safari only works on Mac OS X and iOS 13 (or later). Chrome needs to be the same version as the current installed ChromeDriver (check the changelog for what version that is currently used). Use --chrome.chromedriverPath to use another ChromeDriver version. [choices: "chrome", "firefox", "safari"] [default: "chrome"]
--browsertime.iterations, -n How many times you want to test each page [default: 3]
--browsertime.spa, --spa Convenient parameter to use if you test a SPA application: will automatically wait for X seconds after last network activity and use hash in file names. Read https://www.sitespeed.io/documentation/sitespeed.io/spa/ [boolean] [default: false]
--browsertime.connectivity.profile, -c The connectivity profile. To actually set the connectivity you can choose between Docker networks or Throttle, read https://www.sitespeed.io/documentation/sitespeed.io/connectivity/ [string] [choices: "3g", "3gfast", "3gslow", "3gem", "2g", "cable", "native", "custom"] [default: "native"]
--browsertime.connectivity.alias Give your connectivity profile a custom name [string]
--browsertime.connectivity.downstreamKbps, --downstreamKbps This option requires --connectivity be set to "custom".
--browsertime.connectivity.upstreamKbps, --upstreamKbps This option requires --connectivity be set to "custom".
--browsertime.connectivity.latency, --latency This option requires --connectivity be set to "custom".
--browsertime.connectivity.engine, --connectivity.engine The engine for connectivity. Throttle works on Mac and tc based Linux. Use external if you set the connectivity outside of Browsertime. Use tsproxy if you are using Kubernetes. More documentation at https://www.sitespeed.io/documentation/sitespeed.io/connectivity/. [string] [choices: "external", "throttle", "tsproxy"] [default: "external"]
--browsertime.pageCompleteCheck, --pageCompleteCheck Supply a JavaScript that decides when the browser is finished loading the page and can start to collect metrics. The JavaScript snippet is repeatedly queried to see if page has completed loading (indicated by the script returning true). Use it to fetch timings happening after the loadEventEnd.
--browsertime.pageCompleteWaitTime, --pageCompleteWaitTime How long time you want to wait for your pageComplteteCheck to finish, after it is signaled to closed. Extra parameter passed on to your pageCompleteCheck. [default: 5000]
--browsertime.pageCompleteCheckInactivity, --pageCompleteCheckInactivity Alternative way to choose when to end your test. This will wait for 2 seconds of inactivity that happens after loadEventEnd. [boolean] [default: false]
--browsertime.pageCompleteCheckPollTimeout, --pageCompleteCheckPollTimeout The time in ms to wait for running the page complete check the next time. [number] [default: 200]
--browsertime.pageCompleteCheckStartWait, --pageCompleteCheckStartWait The time in ms to wait for running the page complete check for the first time. Use this when you have a pageLoadStrategy set to none [number] [default: 500]
--browsertime.pageLoadStrategy, --pageLoadStrategy Set the strategy to waiting for document readiness after a navigation event. After the strategy is ready, your pageCompleteCheck will start running. This only work for Firefox and Chrome and please check which value each browser implements. [string] [choices: "eager", "none", "normal"] [default: "normal"]
--browsertime.script, --script Add custom Javascript that collect metrics and run after the page has finished loading. Note that --script can be passed multiple times if you want to collect multiple metrics. The metrics will automatically be pushed to the summary/detailed summary and each individual page + sent to Graphite/InfluxDB.
--browsertime.injectJs, --injectJs Inject JavaScript into the current page at document_start. More info: https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/API/contentScripts
--browsertime.selenium.url Configure the path to the Selenium server when fetching timings using browsers. If not configured the supplied NodeJS/Selenium version is used.
--browsertime.viewPort, --viewPort The browser view port size WidthxHeight like 400x300 [default: "1366x708"]
--browsertime.userAgent, --userAgent The full User Agent string, defaults to the User Agent used by the browsertime.browser option.
--browsertime.preURL, --preURL A URL that will be accessed first by the browser before the URL that you wanna analyse. Use it to fill the cache.
--browsertime.preScript, --preScript Selenium script(s) to run before you test your URL. They will run outside of the analyse phase. Note that --preScript can be passed multiple times.
--browsertime.postScript, --postScript Selenium script(s) to run after you test your URL. They will run outside of the analyse phase. Note that --postScript can be passed multiple times.
--browsertime.delay, --delay Delay between runs, in milliseconds. Use it if your web server needs to rest between runs :)
--browsertime.visualMetrics, --visualMetrics, --speedIndex Calculate Visual Metrics like SpeedIndex, First Visual Change and Last Visual Change. Requires FFMpeg and Python dependencies [boolean]
--browsertime.visualElements, --visualElements Collect Visual Metrics from elements. Works only with --visualMetrics turned on. By default you will get visual metrics from the largest image within the view port and the largest h1. You can also configure to pickup your own defined elements with --scriptInput.visualElements [boolean]
--browsertime.scriptInput.visualElements, --scriptInput.visualElements Include specific elements in visual elements. Give the element a name and select it with document.body.querySelector. Use like this: --scriptInput.visualElements name:domSelector . Add multiple instances to measure multiple elements. Visual Metrics will use these elements and calculate when they are visible and fully rendered.
--browsertime.scriptInput.longTask, --minLongTaskLength Set the minimum length of a task to be categorised as a CPU Long Task. It can never be smaller than 50. The value is in ms and you make Browsertime collect long tasks using --chrome.collectLongTasks or --cpu. [number] [default: 50]
--browsertime.video, --video Record a video and store the video. Set it to false to remove the video that is created by turning on visualMetrics. To remove fully turn off video recordings, make sure to set video and visualMetrics to false. Requires FFMpeg to be installed. [boolean]
--browsertime.videoParams.framerate, --videoParams.framerate, --fps Frames per second in the video [default: 30]
--browsertime.videoParams.crf, --videoParams.crf Constant rate factor for the end result video, see https://trac.ffmpeg.org/wiki/Encode/H.264#crf [default: 23]
--browsertime.videoParams.addTimer, --videoParams.addTimer Add timer and metrics to the video [boolean] [default: true]
--browsertime.userTimingWhitelist, --userTimingWhitelist This option takes a regex that will whitelist which userTimings to capture in the results. All userTimings are captured by default. T
--axe.enable Run axe tests. Axe will run after all other metrics is collected and will add some extra time to each test. [boolean]
--browsertime.requestheader, -r, --requestheader Request header that will be added to the request. Add multiple instances to add multiple request headers. Use the following format key:value. Only works in Chrome and Firefox.
--browsertime.cookie, --cookie Cookie that will be added to the request. Add multiple instances to add multiple cookies. Use the following format cookieName=cookieValue. Only works in Chrome and Firefox.
--browsertime.block, --block Domain to block. Add multiple instances to add multiple domains that will be blocked. Only works in Chrome and Firefox.
--browsertime.basicAuth, --basicAuth Use it if your server is behind Basic Auth. Format: username@password. Only works in Chrome and Firefox.
--browsertime.headless, --headless Run the browser in headless mode. This is the browser internal headless mode, meaning you cannot collect Visual Metrics or in Chrome run any WebExtension (this means you cannot add cookies, requestheaders or use basic auth for headless Chrome). Only works in Chrome and Firefox. [boolean] [default: false]
Filmstrip
--browsertime.videoParams.filmstripFullSize, --videoParams.filmstripFullSize Keep original sized screenshots in the filmstrip. Will make the run take longer time [boolean] [default: false]
--browsertime.videoParams.filmstripQuality, --videoParams.filmstripQuality The quality of the filmstrip screenshots. 0-100. [default: 75]
--browsertime.videoParams.createFilmstrip, --videoParams.createFilmstrip Create filmstrip screenshots. [boolean] [default: true]
--filmstrip.showAll Show all screenshots in the filmstrip, independent if they have changed or not. [boolean] [default: false]
Firefox
--browsertime.firefox.includeResponseBodies, --firefox.includeResponseBodies Include response bodies in HAR [choices: "none", "all", "html"] [default: "none"]
--browsertime.firefox.nightly, --firefox.nightly Use Firefox Nightly. Works on OS X. For Linux you need to set the binary path. [boolean]
--browsertime.firefox.beta, --firefox.beta Use Firefox Beta. Works on OS X. For Linux you need to set the binary path. [boolean]
--browsertime.firefox.developer, --firefox.developer Use Firefox Developer. Works on OS X. For Linux you need to set the binary path. [boolean]
--browsertime.firefox.binaryPath, --firefox.binaryPath Path to custom Firefox binary (e.g. Firefox Nightly). On OS X, the path should be to the binary inside the app bundle, e.g. /Applications/Firefox.app/Contents/MacOS/firefox-bin
--browsertime.firefox.preference, --firefox.preference Extra command line arguments to pass Firefox preferences by the format key:value To add multiple preferences, repeat --firefox.preference once per argument.
--browsertime.firefox.acceptInsecureCerts, --firefox.acceptInsecureCerts Accept insecure certs [boolean]
--browsertime.firefox.windowRecorder, --firefox.windowRecorder Use the internal compositor-based Firefox window recorder to emit PNG files for each frame that is a meaningful change. The PNG output will further be merged into a variable frame rate video for analysis. Use this instead of ffmpeg to record a video (you still need the --video flag). [boolean] [default: false]
--browsertime.firefox.collectMozLog, --firefox.collectMozLog Collect the MOZ HTTP log [boolean]
Chrome
--browsertime.chrome.args, --chrome.args Extra command line arguments to pass to the Chrome process. Always leave out the starting -- (--no-sandbox will be no-sandbox). To add multiple arguments to Chrome, repeat --browsertime.chrome.args once per argument. See https://peter.sh/experiments/chromium-command-line-switches/
--browsertime.chrome.timeline, --chrome.timeline Collect the timeline data. Drag and drop the JSON in your Chrome detvools timeline panel or check out the CPU metrics. [boolean]
--browsertime.chrome.android.package, --chu rome.android.package Run Chrome on your Android device. Set to com.android.chrome for default Chrome version. You need to run adb start-server before you start.
--browsertime.chrome.android.deviceSerial, --chrome.android.deviceSerial Choose which device to use. If you do not set it, the first found device will be used.
--browsertime.chrome.collectNetLog, --chrome.collectNetLog Collect network log from Chrome and save to disk. [boolean]
--browsertime.chrome.traceCategories, --chrome.traceCategories Set the trace categories. [string]
--browsertime.chrome.enableTraceScreenshots, --chrome.enableTraceScreenshots Include screenshots in the trace log (enabling the trace category disabled-by-default-devtools.screenshot). [boolean]
--browsertime.chrome.collectConsoleLog, --chrome.collectConsoleLog Collect Chromes console log and save to disk. [boolean]
--browsertime.chrome.binaryPath, --chrome.binaryPath Path to custom Chrome binary (e.g. Chrome Canary). On OS X, the path should be to the binary inside the app bundle, e.g. "/Applications/Google Chrome Canary.app/Contents/MacOS/Google Chrome Canary"
--browsertime.chrome.chromedriverPath, --chrome.chromedriverPath Path to custom ChromeDriver binary. Make sure to use a ChromeDriver version that's compatible with the version of Chrome you're using
--browsertime.chrome.cdp.performance, --chrome.cdp.performance Collect Chrome performance metrics from Chrome DevTools Protocol [boolean] [default: true]
--browsertime.chrome.collectLongTasks, --chrome.collectLongTasks Collect CPU long tasks, using the Long Task API [boolean]
--browsertime.chrome.CPUThrottlingRate, --chrome.CPUThrottlingRate Enables CPU throttling to emulate slow CPUs. Throttling rate as a slowdown factor (1 is no throttle, 2 is 2x slowdown, etc) [number]
--browsertime.cpu, --cpu Easy way to enable both chrome.timeline and CPU long tasks. Only works for Chrome. [boolean]
--thirdParty.cpu Enable CPU time spent data to Graphite/Grafana per third party tool. [boolean]
--browsertime.chrome.includeResponseBodies, --chrome.includeResponseBodies Include response bodies in the HAR file. [choices: "none", "html", "all"] [default: "none"]
--browsertime.chrome.blockDomainsExcept, --chrome.blockDomainsExcept Block all domains except this domain. Use it multiple time to keep multiple domains. You can also wildcard domains like *.sitespeed.io. Use this when you wanna block out all third parties.
Safari
--browsertime.safari.ios, --safari.ios Use Safari on iOS. You need to choose browser Safari and iOS to run on iOS. Only works on OS X Catalina and iOS 13 (and later). [boolean] [default: false]
--browsertime.safari.deviceName, --safari.deviceName Set the device name. Device names for connected devices are shown in iTunes.
--browsertime.safari.deviceUDID, --safari.deviceUDID Set the device UDID. If Xcode is installed, UDIDs for connected devices are available via the output of instruments(1) and in the Device and Simulators window (accessed in Xcode via "Window > Devices and Simulators")
--browsertime.safari.deviceType, --safari.deviceType Set the device type. If the value of safari:deviceType is `iPhone`, safaridriver will only create a session using an iPhone device or iPhone simulator. If the value of safari:deviceType is `iPad`, safaridriver will only create a session using an iPad device or iPad simulator.
--browsertime.safari.diagnose, --safari.diagnose When filing a bug report against safaridriver, it is highly recommended that you capture and include diagnostics generated by safaridriver. Diagnostic files are saved to ~/Library/Logs/com.apple.WebDriver/
--browsertime.safari.useSimulator, --safari.useSimulator If the value of useSimulator is true, safaridriver will only use iOS Simulator hosts. If the value of safari:useSimulator is false, safaridriver will not use iOS Simulator hosts. NOTE: An Xcode installation is required in order to run WebDriver tests on iOS Simulator hosts. [boolean] [default: false]
proxy
--browsertime.proxy.http, --proxy.http Http proxy (host:port) [string]
--browsertime.proxy.https, --proxy.https Https proxy (host:port) [string]
Crawler
--crawler.depth, -d How deep to crawl (1=only one page, 2=include links from first page, etc.)
--crawler.maxPages, -m The max number of pages to test. Default is no limit.
--crawler.exclude Exclude URLs matching the provided regular expression (ex: "/some/path/", "://some\.domain/"). Can be provided multiple times.
--crawler.include Discard URLs not matching the provided regular expression (ex: "/some/path/", "://some\.domain/"). Can be provided multiple times.
Grafana
--grafana.host The Grafana host used when sending annotations.
--grafana.port The Grafana port used when sending annotations to Grafana. [default: 80]
--grafana.auth The Grafana auth/bearer value used when sending annotations to Grafana. See http://docs.grafana.org/http_api/auth/#authentication-api
--grafana.annotationTitle Add a title to the annotation sent for a run.
--grafana.annotationMessage Add an extra message that will be attached to the annotation sent for a run. The message is attached after the default message and can contain HTML.
--grafana.annotationTag Add a extra tag to the annotation sent for a run. Repeat the --grafana.annotationTag option for multiple tags. Make sure they do not collide with the other tags.
--grafana.annotationScreenshot Include screenshot (from Browsertime/WebPageTest) in the annotation. You need to specify a --resultBaseURL for this to work. [boolean] [default: false]
Graphite
--graphite.host The Graphite host used to store captured metrics.
--graphite.port The Graphite port used to store captured metrics. [default: 2003]
--graphite.auth The Graphite user and password used for authentication. Format: user:password
--graphite.httpPort The Graphite port used to access the user interface and send annotations event [default: 8080]
--graphite.webHost The graphite-web host. If not specified graphite.host will be used.
--graphite.namespace The namespace key added to all captured metrics. [default: "sitespeed_io.default"]
--graphite.includeQueryParams Whether to include query parameters from the URL in the Graphite keys or not [boolean] [default: false]
--graphite.arrayTags Send the tags as Array or a String. In Graphite 1.0 the tags is a array. Before a String [boolean] [default: true]
--graphite.annotationTitle Add a title to the annotation sent for a run.
--graphite.annotationMessage Add an extra message that will be attached to the annotation sent for a run. The message is attached after the default message and can contain HTML.
--graphite.annotationScreenshot Include screenshot (from Browsertime/WebPageTest) in the annotation. You need to specify a --resultBaseURL for this to work. [boolean] [default: false]
--graphite.statsd Uses the StatsD interface [boolean] [default: false]
--graphite.annotationTag Add a extra tag to the annotation sent for a run. Repeat the --graphite.annotationTag option for multiple tags. Make sure they do not collide with the other tags.
--graphite.bulkSize Break up number of metrics to send with each request. [number] [default: null]
--graphite.experimental.perIteration Experimental setup to send each iteration of metrics to Graphite. Experimental means this can change and is not released as stable. Use it with care. [boolean] [default: false]
Plugins
--plugins.list List all configured plugins in the log. [boolean]
--plugins.add Extra plugins that you want to run. Relative or absolute path to the plugin. Specify multiple plugin names separated by comma, or repeat the --plugins.add option
--plugins.remove Default plugins that you not want to run. Specify multiple plugin names separated by comma, or repeat the --plugins.remove option
Budget
--budget.configPath Path to the JSON budget file.
--budget.suppressExitCode By default sitespeed.io returns a failure exit code, if the budget fails. Set this to true and sitespeed.io will return exit code 0 independent of the budget.
--budget.config The JSON budget config as a string.
--budget.output The output format of the budget. [choices: "junit", "tap", "json"]
Screenshot
--browsertime.screenshot Set to false to disable screenshots [boolean] [default: true]
--browsertime.screenshotParams.type, --screenshot.type Set the file type of the screenshot [choices: "png", "jpg"] [default: "png"]
--browsertime.screenshotParams.png.compressionLevel, --screenshot.png.compressionLevel zlib compression level [default: 6]
--browsertime.screenshotParams.jpg.quality, --screenshot.jpg.quality Quality of the JPEG screenshot. 1-100 [default: 80]
--browsertime.screenshotParams.maxSize, --screenshot.maxSize The max size of the screenshot (width and height). [default: 2000]
InfluxDB
--influxdb.protocol The protocol used to store connect to the InfluxDB host. [default: "http"]
--influxdb.host The InfluxDB host used to store captured metrics.
--influxdb.port The InfluxDB port used to store captured metrics. [default: 8086]
--influxdb.username The InfluxDB username for your InfluxDB instance.
--influxdb.password The InfluxDB password for your InfluxDB instance.
--influxdb.database The database name used to store captured metrics. [default: "sitespeed"]
--influxdb.tags A comma separated list of tags and values added to each metric [default: "category=default"]
--influxdb.includeQueryParams Whether to include query parameters from the URL in the InfluxDB keys or not [boolean] [default: false]
--influxdb.groupSeparator Choose which character that will seperate a group/domain. Default is underscore, set it to a dot if you wanna keep the original domain name. [default: "_"]
--influxdb.annotationScreenshot Include screenshot (from Browsertime) in the annotation. You need to specify a --resultBaseURL for this to work. [boolean] [default: false]
Metrics
--metrics.list List all possible metrics in the data folder (metrics.txt). [boolean] [default: false]
--metrics.filterList List all configured filters for metrics in the data folder (configuredMetrics.txt) [boolean] [default: false]
--metrics.filter Add/change/remove filters for metrics. If you want to send all metrics, use: *+ . If you want to remove all current metrics and send only the coach score: *- coach.summary.score.* [array]
WebPageTest
--webpagetest.host The domain of your WebPageTest instance. [default: "https://www.webpagetest.org"]
--webpagetest.key The API key for you WebPageTest instance.
--webpagetest.location The location for the test [default: "Dulles:Chrome"]
--webpagetest.connectivity The connectivity for the test. [default: "Cable"]
--webpagetest.runs The number of runs per URL. [default: 3]
--webpagetest.custom Execute arbitrary Javascript at the end of a test to collect custom metrics.
--webpagetest.file Path to a script file
--webpagetest.script The WebPageTest script as a string.
--webpagetest.includeRepeatView Do repeat or single views [boolean] [default: false]
--webpagetest.private Wanna keep the runs private or not [boolean] [default: true]
--webpagetest.timeline Activates Chrome tracing and get the devtools.timeline (only works for Chrome). [boolean] [default: false]
Slack
--slack.hookUrl WebHook url for the Slack team (check https://<your team>.slack.com/apps/manage/custom-integrations).
--slack.userName User name to use when posting status to Slack. [default: "Sitespeed.io"]
--slack.channel The slack channel without the # (if something else than the default channel for your hook).
--slack.type Send summary for a run, metrics from all URLs, only on errors or all to Slack. [choices: "summary", "url", "error", "all"] [default: "all"]
--slack.limitWarning The limit to get a warning in Slack using the limitMetric [default: 90]
--slack.limitError The limit to get a error in Slack using the limitMetric [default: 80]
--slack.limitMetric The metric that will be used to set warning/error. You can choose only one at the moment. [choices: "coachScore", "speedIndex", "firstVisualChange", "firstPaint", "visualComplete85", "lastVisualChange", "fullyLoaded"] [default: "coachScore"]
s3
--s3.endpoint The S3 endpoint. Optional depending on your settings.
--s3.key The S3 key.
--s3.secret The S3 secret.
--s3.bucketname Name of the S3 bucket,
--s3.path Override the default folder path in the bucket where the results are uploaded. By default it's "DOMAIN_OR_FILENAME/TIMESTAMP", or the name of the folder if --outputFolder is specified.
--s3.region The S3 region. Optional depending on your settings.
--s3.acl The S3 canned ACL to set. Optional depending on your settings.
--s3.removeLocalResult Remove all the local result files after they have been uploaded to S3. [boolean] [default: false]
--s3.params Extra params passed when you do the S3.upload: https://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/S3.html#upload-property - Example: --s3.params.Expires=31536000 to set expire to one year.
--s3.options Extra options passed when you create the S3 object: https://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/S3.html#constructor-property - Example: add --s3.options.apiVersion=2006-03-01 to lock to a specific API version.
GoogleCloudStorage
--gcs.projectId The Google Cloud storage Project ID
--gcs.key The path to the Google Cloud storage service account key JSON.
--gcs.bucketname Name of the Google Cloud storage bucket
--gcs.public Make uploaded results to Google Cloud storage publicly readable. [boolean] [default: false]
--gcs.gzip Add content-encoding for gzip to the uploaded files. Read more at https://cloud.google.com/storage/docs/transcoding. If you host your results directly from the bucket, gzip must be set to false [boolean] [default: false]
--gcs.path Override the default folder path in the bucket where the results are uploaded. By default it's "DOMAIN_OR_FILENAME/TIMESTAMP", or the name of the folder if --outputFolder is specified.
--gcs.removeLocalResult Remove all the local result files after they have been uploaded to Google Cloud storage. [boolean] [default: false]
HTML
--html.showAllWaterfallSummary Set to true to show all waterfalls on page summary HTML report [boolean] [default: false]
--html.fetchHARFiles Set to true to load HAR files using fetch instead of including them in the HTML. Turn this on if serve your pages using a server. [boolean] [default: false]
--html.logDownloadLink Adds a link in the HTML so you easily can download the logs from the sitespeed.io run. If your server is public, be careful so you don't log passwords etc [boolean] [default: false]
--html.topListSize Maximum number of assets to include in each toplist in the toplist tab [default: 10]
--html.showScript Show a link to the script you use to run. Be careful if your result is public and you keep passwords in your script. [boolean] [default: false]
--html.assetsBaseURL The base URL to the server serving the assets of HTML results. In the format of https://result.sitespeed.io. This can be used to reduce size in large setups. If set, disables writing of assets to the output folder.
--html.compareURL, --html.compareUrl Will add a link on the waterfall page, helping you to compare the HAR. The full path to your compare installation. In the format of https://compare.sitespeed.io/
--html.pageSummaryMetrics Select from a list of metrics to be displayed for given URL(s). Pass on multiple --html.pageSummaryMetrics to add more than one column. This is best used as an array in your config.json file. [default: ["transferSize.total","requests.total","thirdParty.requests","transferSize.javascript","transferSize.css","transferSize.image","score.performance"]]
--html.summaryBoxes Select required summary information to be displayed on result index page. [default: ["score.score","score.accessibility","score.bestpractice","score.privacy","score.performance","timings.firstPaint","timings.fullyLoaded","timings.pageLoadTime","timings.FirstVisualChange","timings.LastVisualChange","timings.SpeedIndex","timings.PerceptualSpeedIndex","timings.VisualReadiness","timings.VisualComplete","requests.total","requests.javascript","requests.css","requests.image","transferSize.total","transferSize.html","transferSize.javascript","contentSize.javascript","transferSize.css","transferSize.image","thirdParty.transferSize","thirdParty.requests","webpagetest.SpeedIndex","webpagetest.lastVisualChange","webpagetest.render","webpagetest.visualComplete","webpagetest.visualComplete95","webpagetest.TTFB","webpagetest.fullyLoaded","axe.critical","axe.serious","axe.minor","axe.moderate","cpu.longTasksTotalDuration","cpu.longTasks","cpu.totalBlockingTime","cpu.maxPotentialFid"]]
Text
--summary Show brief text summary to stdout [boolean] [default: false]
--summary-detail Show longer text summary to stdout [boolean] [default: false]
Options:
--version, -V Show version number [boolean]
--debugMessages Debug mode logs all internal messages in the message queue to the log. [boolean] [default: false]
--verbose, -v, --debug Verbose mode prints progress messages to the console. Enter up to three times (-vvv) to increase the level of detail. [count]
--browsertime.android, --android Short key to use Android. Will automatically use com.android.chrome (Chrome stable). If you want to use another Chrome version, use --chrome.android.package [boolean] [default: false]
--plugins.disable [array]
--plugins.load [array]
--mobile Access pages as mobile a fake mobile device. Set UA and width/height. For Chrome it will use device Apple iPhone 6. [boolean] [default: false]
--resultBaseURL, --resultBaseUrl The base URL to the server serving the HTML result. In the format of https://result.sitespeed.io
--gzipHAR Compress the HAR files with GZIP. [boolean] [default: false]
--outputFolder The folder where the result will be stored. [string]
--firstParty A regex running against each request and categorize it as first vs third party URL. (ex: ".*sitespeed.*")
--urlAlias Use an alias for the URL (if you feed URLs from a file you can instead have the alias in the file). You need to pass on the same amount of alias as URLs. The alias is used as the name of the URL on the HTML report and in Graphite/InfluxDB. Pass on multiple --urlAlias for multiple alias/URLs. This will override alias in a file. [string]
--utc Use Coordinated Universal Time for timestamps [boolean] [default: false]
--logToFile Store the log for your run into a file in logs/sitespeed.io.log [boolean] [default: false]
--useHash If your site uses # for URLs and # give you unique URLs you need to turn on useHash. By default is it turned off, meaning URLs with hash and without hash are treated as the same URL [boolean] [default: false]
--multi Test multiple URLs within the same browser session (same cache etc). Only works with Browsertime. Use this if you want to test multiple pages (use journey) or want to test multiple pages with scripts. You can mix URLs and scripts (the order will matter): login.js https://www.sitespeed.io/ logout.js - More details: https://www.sitespeed.io/documentation/sitespeed.io/scripting/ [boolean] [default: false]
--name Give your test a name.
--config Path to JSON config file
--help, -h Show help [boolean]
Read the docs at https://www.sitespeed.io/documentation/sitespeed.io/
The basics #
You can analyse a site either by crawling or by feeding sitespeed.io with a list of URLs you want to analyse.
Analyse by URLs #
The simplest way to run sitespeed.io is to give it a URL:
docker run --rm -v "$(pwd)":/sitespeed.io sitespeedio/sitespeed.io:11.9.3 https://www.sitespeed.io
If you want to test multiple URLs, then just add them. Each page will be tested with a new browser session, browser cache cleared between each URL.
docker run --rm -v "$(pwd)":/sitespeed.io sitespeedio/sitespeed.io:11.9.3 https://www.sitespeed.io https://www.sitespeed.io/documentation/
You can also use a plain text file with one URL on each line. Create a file called urls.txt:
http://www.yoursite.com/path/
http://www.yoursite.com/my/really/important/page/
http://www.yoursite.com/where/we/are/
Another feature of the plain text file is you can add aliases to the urls.txt file after each URL. To do this, add a non-spaced string after each URL that you would like to alias:
http://www.yoursite.com/ Start_page
http://www.yoursite.com/my/really/important/page/ Important_Page
http://www.yoursite.com/where/we/are/ We_are
Note: Spaces are used to delimit between the URL and the alias, which is why the alias cannot contain one.
Aliases are great in combination with sending metrics to a TSDB (such as Graphite) for shortening the key sent, to make them more user friendly and readable.
And run it:
docker run --rm -v "$(pwd)":/sitespeed.io sitespeedio/sitespeed.io:11.9.3 urls.txt
You can also add alias directly from the command line. Make yore that you pass on the same amount of alias and URLs.
docker run --rm -v "$(pwd)":/sitespeed.io sitespeedio/sitespeed.io:11.9.3 --urlAlias doc https://www.sitespeed.io/documumentation/
Pass on multiple –urlAlias for multiple alias/URLs.
If you want to test multiple URLs in a sequence (where the browser cache is not cleared) use –multi:
docker run --rm -v "$(pwd)":/sitespeed.io sitespeedio/sitespeed.io:11.9.3 --multi https://www.sitespeed.io https://www.sitespeed.io/documentation/
If you wanna do more complicated things like log in the user, add items to a cart etc, checkout scripting.
Analyse by crawling #
If you want to find pages that are not so performant it’s a good idea to crawl. Sitespeed.io will start with the URL and fetch all links on that page and continue to dig deeper into the site structure. You can choose how deep to crawl (1=only one page, 2=include links from first page, etc.):
docker run --rm -v "$(pwd)":/sitespeed.io sitespeedio/sitespeed.io:11.9.3 https://www.sitespeed.io -d 2
How many runs per URL? #
When collecting timing metrics, it’s good to test the URL more than one time (default is three times). You can configure how many runs like this (five runs):
docker run --rm -v "$(pwd)":/sitespeed.io sitespeedio/sitespeed.io:11.9.3 https://www.sitespeed.io -n 5
Choose browser #
Choose which browser to use (default is Chrome):
docker run --rm -v "$(pwd)":/sitespeed.io sitespeedio/sitespeed.io:11.9.3 https://www.sitespeed.io -b firefox
Connectivity #
You should throttle the connection when you are fetching metrics. We have a special section on how you emulate connectivity for real users. Make sure you read that parts of the documentation!
Viewport/user agent and mobile #
You can set the viewport & user agent, so you can fake testing a site as a mobile device.
The simplest way is to just add --mobile as a parameter. The viewport will be set to 360x640 and the user agent will be Iphone6. If you use Chrome it will use the preset Apple iPhone 6 device.
docker run --rm -v "$(pwd)":/sitespeed.io sitespeedio/sitespeed.io:11.9.3 https://www.sitespeed.io --mobile
You can also set a specific viewport and user agent:
docker run --rm -v "$(pwd)":/sitespeed.io sitespeedio/sitespeed.io:11.9.3 https://www.sitespeed.io --browsertime.viewPort 400x400 --browsertime.userAgent "UCWEB/2.0 (MIDP-2.0; U; Adr 4.4.4; en-US; XT1022) U2/1.0.0 UCBrowser/10.6.0.706 U2/1.0.0 Mobile"
Mobile testing is always best on actual mobile devices. You can test on Android phones using sitespeed.io.
Visual metrics and video #
In 4.1 we released support for recording a video of the browser screen and use that to calculate visual metrics like Speed Index. This is one of the main benefits for using our Docker images, as it makes for an easy setup. Without Docker, you would need to install all the dependencies.
In 6.0 video and Visual Metrics is turned on by default, and if you want to turn them off you do like this:
docker run --rm -v "$(pwd)":/sitespeed.io sitespeedio/sitespeed.io:11.9.3 --visualMetrics false https://www.sitespeed.io/
docker run --rm -v "$(pwd)":/sitespeed.io sitespeedio/sitespeed.io:11.9.3 --visualMetrics false --video false https://www.sitespeed.io/
First party vs third party #
By default we will categorise the current main domain as first party and the rest as a third party. And you probably wanna categorise requests yourself as first or third parties by adding a regex.
docker run --rm -v "$(pwd)":/sitespeed.io sitespeedio/sitespeed.io:11.9.3 --firstParty ".ryanair.com" https://www.ryanair.com/us/en/
This is a JavaScript regex and if you need help you should test it out at https://regexr.com to see that it will match.
Output folder or where to store the result #
You can change where you want the data to be stored by setting the --outputFolder parameter. That is good in scenarios where you want to change the default behaviour and put the output in a specific location:
docker run --rm -v "$(pwd)":/sitespeed.io sitespeedio/sitespeed.io:11.9.3 --outputFolder /my/folder https://www.sitespeed.io/
Configuration as JSON #
You can keep all your configuration in a JSON file and then pass it on to sitespeed.io, and override with CLI parameters. We use yargs for the CLI and configuration.
The CLI parameters can easily be converted to a JSON, using the full name of the cli name. A simple example is when you configure which browser to use. The shorthand name is -b but if you check the help (--help) you can see that the full name is browsertime.browser. That means that -band --browsertime.browser is the same. And in your JSON configuration that looks like this:
{
"browsertime": {
"browser": "chrome"
}
}
A more complex example: Create a config file and call it config.json:
{
"browsertime": {
"iterations": 5,
"browser": "chrome"
},
"graphite": {
"host": "my.graphite.host",
"namespace": "sitespeed_io.desktopFirstView"
},
"plugins": {
"remove": ["html"]
},
"utc": true
}
Then, run it like this:
docker run --rm -v "$(pwd)":/sitespeed.io sitespeedio/sitespeed.io:11.9.3 --config config.json https://www.sitespeed.io
If you want to override and run the same configuration but using Firefox, you just override with the CLI parameter:
docker run --rm -v "$(pwd)":/sitespeed.io sitespeedio/sitespeed.io:11.9.3 --config config.json -b firefox https://www.sitespeed.io
The CLI will always override the JSON config.
You can also extend another JSON config file. The path needs to be absolute.
{
"extends":"/path/to/config.json",
"browsertime": {
"iterations": 5,
"browser": "chrome"
},
"graphite": {
"host": "my.graphite.host",
"namespace": "sitespeed_io.desktopFirstView"
},
"plugins": {
"remove": ["html"]
},
"utc": true
}
You can check out our example configuration for dashboard.sitespeed.io.
Advanced #
Slack #
You can send the result of a run to Slack. First, set up a webhook in the Slack API (https://
docker run --rm -v "$(pwd)":/sitespeed.io sitespeedio/sitespeed.io:11.9.3 https://www.sitespeed.io/ --slack.hookUrl https://hooks.slack.com/services/YOUR/HOOK/URL
You can choose to send just a summary (the summary for all runs), individual runs (with URL), only errors, or everything, by choosing the respective slack.type.
docker run --rm -v "$(pwd)":/sitespeed.io sitespeedio/sitespeed.io:11.9.3 https://www.sitespeed.io/ --slack.hookUrl https://hooks.slack.com/services/YOUR/HOOK/URL --slack.type summary
Log in the user #
We have added a special section for that!