Webperf result docs.developers.optimizely.com

Standards section:
- Page not found, no valid 404 response status code usederror
Tested:
- https://docs.developers.optimizely.com/a698a/finns-det-en-sida/pa-den-har-adressen/testanrop/

- Page not found, no valid h1 header foundwarning
Tested:
- https://docs.developers.optimizely.com/a698a/finns-det-en-sida/pa-den-har-adressen/testanrop/

- Page not found, no valid body text found, may because it is too shortwarning
Tested:
- https://docs.developers.optimizely.com/a698a/finns-det-en-sida/pa-den-har-adressen/testanrop/

- Page not found, has expected 404 responseok
- Page not found, valid title foundok
- Page not found, valid text foundok
- Page not found, valid text foundok
- Page not found, used supported localeok
- Page not found, network is usableok

Security section:
- security.txt has incorrect contenterror
Tested:
- https://docs.developers.optimizely.com/.well-known/security.txt
- https://docs.developers.optimizely.com/security.txt

- security.txt is missing the required contact infowarning
Tested:
- https://docs.developers.optimizely.com/.well-known/security.txt
- https://docs.developers.optimizely.com/security.txt

- security.txt requires expiration information (added in draft v10) is missingwarning
Tested:
- https://docs.developers.optimizely.com/.well-known/security.txt
- https://docs.developers.optimizely.com/security.txt

- Sitemap, Url in <loc> has to start with https://ok
- security.txt is missingok

Standards section:
- Feed is missing in the HTML's metadatawarning
Tested:
- https://docs.developers.optimizely.com/

- robots.txt is missing, not allowed to download or has not the expected contentok
- Sitemap is not specified in robots.txtok
- Sitemap, no valid sitemap foundok
- Sitemap, Url in <loc> must use same domain as robots.txtok
- Sitemap, No duplicate Urls in <loc> allowedok
- Sitemap, lists other stuff then webpagesok
- Sitemap, is exceeding 50 000 itemsok
- Sitemap, has no itemsok

Performance section:
- [desktop] TTFB (Time to First Byte): 165.00ms, ±19.00ms 5.00
- [desktop] DOMContentLoaded: 1033.33ms, ±26.67ms 3.93
- [desktop] LCP (Largest Contentful Paint): 1853.33ms, ±26.67ms 1.00
- [desktop] Load: 1460.00ms, ±40.00ms 3.08
- [desktop] TBT (Total Blocking Time): 705.67ms, ±170.33ms 1.00
- [desktop] CLS (Cumulative Layout Shift): 0.00ms, ±0.00ms 5.00
- [desktop] FirstVisualChange: 567.00ms, ±67.00ms 4.87
- [desktop] SpeedIndex: 791.50ms, ±57.50ms 4.42
- [desktop] VisualComplete85: 567.00ms, ±67.00ms 4.87
- [desktop] FCP (First Contentful Paint): 546.00ms, ±0.00ms 5.00
- [desktop] firstPaint: 546.00ms, ±42.00ms
- [desktop] LastVisualChange: 4205.00ms, ±5.00ms
- [mobile] TTFB (Time to First Byte): 324.00ms, ±157.00ms 5.00
- [mobile] DOMContentLoaded: 1193.33ms, ±236.67ms 5.00
- [mobile] LCP (Largest Contentful Paint): 704.00ms, ±224.00ms 5.00
- [mobile] Load: 1686.67ms, ±243.33ms 4.63
- [mobile] TBT (Total Blocking Time): 1062.00ms, ±78.00ms 1.00
- [mobile] CLS (Cumulative Layout Shift): 0.00ms, ±0.00ms 5.00
- [mobile] FirstVisualChange: 717.00ms, ±217.00ms 5.00
- [mobile] SpeedIndex: 826.50ms, ±213.50ms 5.00
- [mobile] VisualComplete85: 817.00ms, ±117.00ms 5.00
- [mobile] FCP (First Contentful Paint): 704.00ms, ±0.00ms 5.00
- [mobile] firstPaint: 704.00ms, ±224.00ms
- [mobile] LastVisualChange: 2065.00ms, ±235.00ms

Accessibility section:
- The html element should have a lang or xml:lang attribute which describes the language of the document.error
Tested:
- https://docs.developers.optimizely.com/

- This link points to a named anchor "content" within the document, but no anchor exists with that name.error
Tested:
- https://docs.developers.optimizely.com/

- This element has role of "button" but does not have a name available to an accessibility API. Valid names are: element content, aria-label , aria-labelledby .error
Tested:
- https://docs.developers.optimizely.com/

- Iframe element requires a non-empty title attribute that identifies the frame.error
Tested:
- https://docs.developers.optimizely.com/

- About average privacy settings, but should get better.

Security section:
- HTTPS by default is good! 5.00
- HTTP Strict Transport Security HSTS is ok, with 3 error(s) and 0 warning(s). 3.50
- Content Security Policy is pretty bad. 1.00
- Reporting CSP Certificate Transparency Network Error Logging is good! 5.00
- Referrer Policy is not that good. 2.50
- Subresource Integrity SRI is pretty bad. 1.00
- HTTP headers is good! 5.00
- Cookies is ok, with 13 error(s) and 0 warning(s). 1.00

- The website is generating a lot of carbon dioxide, for every pageview :(
- Carbon dioxide per pageview: 17.08 gram(s)
- More green than 2 % of the websites tested by webperf.se (Reference updated: 2026-06-07).
- Network transfer size: 27.01 MB 0.10

- Technology used: es6, js, typescript
- License(s) used: apache-2.0, bsd-3-clause, mit
- Metadata used: canonical, viewport
- Javascript libraries used: astring, core-js, cssremedy, date-fns, editor, focus-lock, fold-case, gecko-dev, highlight.js, json-patch, micromark-extension-mdx-expression, micromark-extension-mdx-jsx, micromark-extension-mdxjs-esm, mobx, react, regenerator, schema, tailwindcss, util, uuid, vega-lite
- Languages found: en
- Image formats used: png, svg

Accessibility section:
##### You don't seem to be using accessibility overlay software 5.00

Security section:
##### Software has been marked as archived 1.75

###### Introduction:
You seem to use software that has been marked as archived, this means it doesn't get any new features or security updates.
To fix this you need to find an alternative, often developers try to point you in the correct direction if you visit the place you got it from.

###### Detected software(s):
- gecko-dev
- regenerator

###### Affected resource(s):
- https://cdn.readme.io/public/hub/web/main.48c919caf7c4a2a812ec.js
- https://www.gstatic.com/_/mss/boq-cloud-ai-ucs/_/js/k=boq-cloud-ai-ucs.UcsWidgetUi.en_US.JN1MKkPjR5Y.2021.O/am=CAAAIzA/d=1/rs=AAj4Nmw4ssaEg1NgOIQBc4aeD5HQIEMqXg/m=bootstrap_module,ucs_widget_module,xlite_module
##### Opensource software has been stale for more than 3 years 4.0

###### Introduction:
You seem to use software that is no longer maintained, this means it doesn't get any new features or security updates.
To fix this you need to find an alternative, often developers try to point you in the correct direction if you visit the place you got it from.

###### Detected software(s):
- cssremedy

###### Affected resource(s):
- https://cdn.readme.io/public/hub/web/main.48c919caf7c4a2a812ec.js
##### NO Common Vulnerabilities and Exposures found 5.00
##### You seem to be up to date for all software we can identify 5.00
##### You don't seem to be using 'END OF LIFE' software 5.00

Standards section:
- CSS, Disallow unknown values for properties within declarationserror
More info:
- https://stylelint.io/user-guide/rules/declaration-property-value-no-unknown

Tested:
- https://cdn.readme.io/public/hub/web/main.991bb7c0f657ffa6fa37.css
- https://cdn.readme.io/public/hub/web/Containers-EndUserContainer.fabcecc828e1a730f2bf.css
- https://cdn.readme.io/public/hub/web/Home.76d71f8ffe2ecda68d13.css
- https://cdn.readme.io/public/hub/web/Header.c5ef215a568f1fcad11c.css
- https://cdn.readme.io/public/hub/web/ui-styles.2258c2800ec717b6f88f.css

- CSS, Disallow unknown pseudo-class selectorserror
More info:
- https://stylelint.io/user-guide/rules/selector-pseudo-class-no-unknown

Tested:
- https://cdn.readme.io/public/hub/web/ui-styles.2258c2800ec717b6f88f.css

- CSS, Disallow unknown type selectorserror
More info:
- https://stylelint.io/user-guide/rules/selector-type-no-unknown

Tested:
- https://docs.developers.optimizely.com/
- https://cdn.readme.io/public/hub/web/ui-styles.2258c2800ec717b6f88f.css

- CSS, Disallow invalid preludes for at-ruleserror
More info:
- https://stylelint.io/user-guide/rules/at-rule-prelude-no-invalid

Tested:
- https://cdn.readme.io/public/hub/web/ui-styles.2258c2800ec717b6f88f.css

- CSS, Disallow unknown functionserror
More info:
- https://stylelint.io/user-guide/rules/function-no-unknown

Tested:
- https://cdn.readme.io/public/hub/web/ui-styles.2258c2800ec717b6f88f.css

- CSS, Disallow unknown propertieserror
More info:
- https://stylelint.io/user-guide/rules/property-no-unknown

Tested:
- https://cdn.readme.io/public/hub/web/ui-styles.2258c2800ec717b6f88f.css

- CSS, Disallow deprecated propertieswarning
More info:
- https://stylelint.io/user-guide/rules/property-no-deprecated

Tested:
- https://cdn.readme.io/public/hub/web/main.991bb7c0f657ffa6fa37.css
- https://cdn.readme.io/public/hub/web/Containers-EndUserContainer.fabcecc828e1a730f2bf.css
- https://fonts.googleapis.com/css2?family=Material+Symbols+Rounded:opsz,wght,FILL,GRAD@20..48,100..700,0..1,-50..200&display=block
- https://cdn.readme.io/public/hub/web/Home.76d71f8ffe2ecda68d13.css
- https://cdn.readme.io/public/hub/web/Header.c5ef215a568f1fcad11c.css
- https://cdn.readme.io/public/hub/web/ui-styles.2258c2800ec717b6f88f.css

- CSS, Disallow unknown custom propertieswarning
More info:
- https://stylelint.io/user-guide/rules/no-unknown-custom-properties

Tested:
- https://cdn.readme.io/public/hub/web/main.991bb7c0f657ffa6fa37.css
- https://cdn.readme.io/public/hub/web/ui-styles.2258c2800ec717b6f88f.css
- https://cdn.readme.io/public/hub/web/Header.c5ef215a568f1fcad11c.css
- https://cdn.readme.io/public/hub/web/Home.76d71f8ffe2ecda68d13.css

- CSS, Disallow deprecated keywords for properties within declarationswarning
More info:
- https://stylelint.io/user-guide/rules/declaration-property-value-keyword-no-deprecated

Tested:
- https://cdn.readme.io/public/hub/web/main.991bb7c0f657ffa6fa37.css
- https://cdn.readme.io/public/hub/web/ui-styles.2258c2800ec717b6f88f.css

- CSS, Disallow unknown annotationsok
More info:
- https://stylelint.io/user-guide/rules/annotation-no-unknown

- CSS, Disallow unknown descriptors for at-rulesok
More info:
- https://stylelint.io/user-guide/rules/at-rule-descriptor-no-unknown

- CSS, Disallow unknown values for descriptors within at-rulesok
More info:
- https://stylelint.io/user-guide/rules/at-rule-descriptor-value-no-unknown

- CSS, Disallow deprecated at-rulesok
More info:
- https://stylelint.io/user-guide/rules/at-rule-no-deprecated

- CSS, Disallow unknown at-rulesok
More info:
- https://stylelint.io/user-guide/rules/at-rule-no-unknown

- CSS, Disallow empty blocksok
More info:
- https://stylelint.io/user-guide/rules/block-no-empty

- CSS, Disallow invalid hex colorsok
More info:
- https://stylelint.io/user-guide/rules/color-no-invalid-hex

- CSS, Disallow empty commentsok
More info:
- https://stylelint.io/user-guide/rules/comment-no-empty

- CSS, Disallow non-standard direction values for linear gradient functionsok
More info:
- https://stylelint.io/user-guide/rules/function-linear-gradient-no-nonstandard-direction

- CSS, Disallow unknown media feature namesok
More info:
- https://stylelint.io/user-guide/rules/media-feature-name-no-unknown

- CSS, Disallow unknown values for media featuresok
More info:
- https://stylelint.io/user-guide/rules/media-feature-name-value-no-unknown

- CSS, Disallow invalid media queriesok
More info:
- https://stylelint.io/user-guide/rules/media-query-no-invalid

- CSS, Disallow deprecated media typesok
More info:
- https://stylelint.io/user-guide/rules/media-type-no-deprecated

- CSS, Disallow invalid named grid areasok
More info:
- https://stylelint.io/user-guide/rules/named-grid-areas-no-invalid

- CSS, Disallow empty sourcesok
More info:
- https://stylelint.io/user-guide/rules/no-empty-source

- CSS, Disallow invalid double-slash commentsok
More info:
- https://stylelint.io/user-guide/rules/no-invalid-double-slash-comments

- CSS, Disallow invalid position `@import` rulesok
More info:
- https://stylelint.io/user-guide/rules/no-invalid-position-at-import-rule

- CSS, Disallow invalid position declarationsok
More info:
- https://stylelint.io/user-guide/rules/no-invalid-position-declaration

- CSS, Disallow unknown animationsok
More info:
- https://stylelint.io/user-guide/rules/no-unknown-animations

- CSS, Disallow unknown custom media queriesok
More info:
- https://stylelint.io/user-guide/rules/no-unknown-custom-media

- selector-no-deprecatedok
More info:
- https://stylelint.io/user-guide/rules/selector-no-deprecated

- selector-no-invalidok
More info:
- https://stylelint.io/user-guide/rules/selector-no-invalid

- CSS, Disallow unknown pseudo-element selectorsok
More info:
- https://stylelint.io/user-guide/rules/selector-pseudo-element-no-unknown

- CSS, Disallow invalid syntax stringsok
More info:
- https://stylelint.io/user-guide/rules/syntax-string-no-invalid

- CSS, Disallow unknown unitsok
More info:
- https://stylelint.io/user-guide/rules/unit-no-unknown

Standards section:
- Require `id` to be a valid identifiererror
More info:
- https://html-validate.org/rules/valid-id.html

Tested:
- https://docs.developers.optimizely.com/

- Ensure required attributes are seterror
More info:
- https://html-validate.org/rules/element-required-attributes.html

Tested:
- https://docs.developers.optimizely.com/

- Disallow the use of unescaped special characterserror
More info:
- https://html-validate.org/rules/no-raw-characters.html

Tested:
- https://docs.developers.optimizely.com/

- Validate permitted contentwarning
More info:
- https://html-validate.org/rules/element-permitted-content.html

Tested:
- https://docs.developers.optimizely.com/

- Require attributes to be separated by whitespaceok
More info:
- https://html-validate.org/rules/attr-spacing.html

- Validate permitted attribute valuesok
More info:
- https://html-validate.org/rules/attribute-allowed-values.html

- Require attribute to be used in correct contextok
More info:
- https://html-validate.org/rules/attribute-misuse.html

- Disallow end tags from having attributesok
More info:
- https://html-validate.org/rules/close-attr.html

- Require elements to be closed in correct orderok
More info:
- https://html-validate.org/rules/close-order.html

- Disallow usage of deprecated elementsok
More info:
- https://html-validate.org/rules/deprecated.html

- Disallow usage of deprecated rulesok
More info:
- https://html-validate.org/rules/deprecated-rule.html

- Require usage of `html` doctypeok
More info:
- https://html-validate.org/rules/doctype-html.html

- Disallow invalid element namesok
More info:
- https://html-validate.org/rules/element-name.html

- Validate permitted number of element occurrencesok
More info:
- https://html-validate.org/rules/element-permitted-occurrences.html

- Validate required element orderok
More info:
- https://html-validate.org/rules/element-permitted-order.html

- Validate permitted element parentok
More info:
- https://html-validate.org/rules/element-permitted-parent.html

- Ensure required elements are presentok
More info:
- https://html-validate.org/rules/element-required-content.html

- Require `<map name>` to be uniqueok
More info:
- https://html-validate.org/rules/map-dup-name.html

- Require name and id to match on `<map>` elementsok
More info:
- https://html-validate.org/rules/map-id-name.html

- Disallow usage of deprecated attributesok
More info:
- https://html-validate.org/rules/no-deprecated-attr.html

- Disallow duplicated attributesok
More info:
- https://html-validate.org/rules/no-dup-attr.html

- Disallow duplicated IDsok
More info:
- https://html-validate.org/rules/no-dup-id.html

- Disallow multiple `<main>`ok
More info:
- https://html-validate.org/rules/no-multiple-main.html

- Disallow unused disable directivesok
More info:
- https://html-validate.org/rules/no-unused-disable.html

- Require end tag for `<script>`ok
More info:
- https://html-validate.org/rules/script-element.html

- Disallow unrecognized character referencesok
More info:
- https://html-validate.org/rules/unrecognized-char-ref.html

- Require autocomplete attribute to be validok
More info:
- https://html-validate.org/rules/valid-autocomplete.html

- Disallow void element with contentok
More info:
- https://html-validate.org/rules/void-content.html

Security section:
- Javascript, disallow javascript: URLserror
More info:
- https://eslint.org/docs/latest/rules/no-script-url

Tested:
- https://cdn.readme.io/public/hub/web/main.48c919caf7c4a2a812ec.js
- https://www.googletagmanager.com/gtag/js?id=G-C7SLJ6HMJ5
- https://www.googletagmanager.com/gtm.js?id=GTM-W2PDKKX2
- https://www.googletagmanager.com/gtag/js?id=G-C7SLJ6HMJ5&cx=c&gtm=4e69m0

- Javascript, disallow the use of eval()error
More info:
- https://eslint.org/docs/latest/rules/no-eval

Tested:
- https://cdn.readme.io/public/hub/web/main.48c919caf7c4a2a812ec.js
- https://cdn.optimizely.com/js/21014920239.js

- Javascript, disallow the use of eval()-like methodsok
More info:
- https://eslint.org/docs/latest/rules/no-implied-eval

Standards section:
- no-debuggerok
More info:
- https://eslint.org/docs/latest/rules/no-debugger

- Performance only 3.95
- Accessibility only 4.00

- deprecationserror
Tested:
- https://docs.developers.optimizely.com/

- third-party-cookieserror
Tested:
- https://docs.developers.optimizely.com/

- The browser reports problems on the pageerror
Tested:
- https://docs.developers.optimizely.com/

- The page uses a secure connection (HTTPS)ok
Tested:
- https://docs.developers.optimizely.com/

- geolocation-on-startok
Tested:
- https://docs.developers.optimizely.com/

- notification-on-startok
Tested:
- https://docs.developers.optimizely.com/

- csp-xssok
Tested:
- https://docs.developers.optimizely.com/

- has-hstsok
Tested:
- https://docs.developers.optimizely.com/

- origin-isolationok
Tested:
- https://docs.developers.optimizely.com/

- clickjacking-mitigationok
Tested:
- https://docs.developers.optimizely.com/

- trusted-types-xssok
Tested:
- https://docs.developers.optimizely.com/

- paste-preventing-inputsok
Tested:
- https://docs.developers.optimizely.com/

- image-aspect-ratiook
Tested:
- https://docs.developers.optimizely.com/

- Images look sharp at the right resolutionok
Tested:
- https://docs.developers.optimizely.com/

- doctypeok
Tested:
- https://docs.developers.optimizely.com/

- charsetok
Tested:
- https://docs.developers.optimizely.com/

- js-librariesok
Tested:
- https://docs.developers.optimizely.com/

- errors-in-consoleok
Tested:
- https://docs.developers.optimizely.com/

- valid-source-mapsok
Tested:
- https://docs.developers.optimizely.com/

- is-crawlableok
Tested:
- https://docs.developers.optimizely.com/

- The page has a titleok
Tested:
- https://docs.developers.optimizely.com/

- meta-descriptionok
Tested:
- https://docs.developers.optimizely.com/

- http-status-codeok
Tested:
- https://docs.developers.optimizely.com/

- link-textok
Tested:
- https://docs.developers.optimizely.com/

- crawlable-anchorsok
Tested:
- https://docs.developers.optimizely.com/

- robots-txtok
Tested:
- https://docs.developers.optimizely.com/

- hreflangok
Tested:
- https://docs.developers.optimizely.com/

- canonicalok
Tested:
- https://docs.developers.optimizely.com/

- Insecure traffic (HTTP) is forwarded to secure (HTTPS)ok
- Images have alternative text for screen readersok
- structured-dataok

Accessibility section:
- The page doesn't state which language it's written inerror
Tested:
- https://docs.developers.optimizely.com/

- landmark-one-mainerror
Tested:
- https://docs.developers.optimizely.com/

- Accessibility markup (ARIA) fits the elements it's onok
Tested:
- https://docs.developers.optimizely.com/

- Accessibility markup (ARIA) is used according to the rulesok
Tested:
- https://docs.developers.optimizely.com/

- No outdated accessibility roles (ARIA) are usedok
Tested:
- https://docs.developers.optimizely.com/

- The page is not hidden from screen readersok
Tested:
- https://docs.developers.optimizely.com/

- Hidden elements can't be reached with the keyboardok
Tested:
- https://docs.developers.optimizely.com/

- Elements only have allowed accessibility markup (ARIA)ok
Tested:
- https://docs.developers.optimizely.com/

- Elements have the required accessibility markup (ARIA)ok
Tested:
- https://docs.developers.optimizely.com/

- Accessibility roles (ARIA) have valid valuesok
Tested:
- https://docs.developers.optimizely.com/

- Accessibility markup (ARIA) has valid valuesok
Tested:
- https://docs.developers.optimizely.com/

- Accessibility markup (ARIA) is correctly spelled and validok
Tested:
- https://docs.developers.optimizely.com/

- Buttons have a name a screen reader can read outok
Tested:
- https://docs.developers.optimizely.com/

- Text has enough contrast against the backgroundok
Tested:
- https://docs.developers.optimizely.com/

- The page has a titleok
Tested:
- https://docs.developers.optimizely.com/

- frame-titleok
Tested:
- https://docs.developers.optimizely.com/

- The headings are in the right orderok
Tested:
- https://docs.developers.optimizely.com/

- labelok
Tested:
- https://docs.developers.optimizely.com/

- Links have text describing where they gook
Tested:
- https://docs.developers.optimizely.com/

- Lists contain only list itemsok
Tested:
- https://docs.developers.optimizely.com/

- List items sit inside a real listok
Tested:
- https://docs.developers.optimizely.com/

- Visitors can zoom on the pageok
Tested:
- https://docs.developers.optimizely.com/

- tabindexok
Tested:
- https://docs.developers.optimizely.com/

- Tap targets are big enough and spaced apartok
Tested:
- https://docs.developers.optimizely.com/

- identical-links-same-purposeok
Tested:
- https://docs.developers.optimizely.com/

- accesskeysok
- aria-command-nameok
- aria-dialog-nameok
- aria-input-field-nameok
- aria-meter-nameok
- aria-progressbar-nameok
- Elements have the child elements accessibility tools requireok
- Elements are inside the parent element accessibility tools requireok
- aria-textok
- aria-toggle-field-nameok
- aria-tooltip-nameok
- aria-treeitem-nameok
- bypassok
- definition-listok
- dlitemok
- duplicate-id-ariaok
- form-field-multiple-labelsok
- The page's language setting is validok
- html-xml-lang-mismatchok
- Images have alternative text for screen readersok
- input-button-nameok
- input-image-altok
- Links can be told apart even without colorok
- meta-refreshok
- object-altok
- select-nameok
- skip-linkok
- td-headers-attrok
- th-has-data-cellsok
- valid-langok
- video-captionok
- focusable-controlsok
- interactive-element-affordanceok
- logical-tab-orderok
- visual-order-follows-domok
- focus-trapsok
- managed-focusok
- use-landmarksok
- offscreen-content-hiddenok
- custom-controls-labelsok
- custom-controls-rolesok
- table-duplicate-nameok
- empty-headingok
- Accessibility roles (ARIA) are used only on elements that support themok
- Images' alternative text doesn't repeat text that's already next to themok
- label-content-name-mismatchok
- table-fake-captionok
- td-has-headerok

Performance section:
- It takes a long time before anything appears on the pageerror
Tested:
- https://docs.developers.optimizely.com/

- It takes a long time before the page's main content appearserror
Tested:
- https://docs.developers.optimizely.com/

- It takes a long time before the page looks finished loadingerror
Tested:
- https://docs.developers.optimizely.com/

- cache-insighterror
Tested:
- https://docs.developers.optimizely.com/

- Text can become invisible while fonts loaderror
Tested:
- https://docs.developers.optimizely.com/

- Files load in a chain that slows the page downerror
Tested:
- https://docs.developers.optimizely.com/

- Some files hold things up when the page is about to showerror
Tested:
- https://docs.developers.optimizely.com/

- It takes a long time before the page can be usederror
Tested:
- https://docs.developers.optimizely.com/

- The page may respond slowly to the visitor's first clickerror
Tested:
- https://docs.developers.optimizely.com/

- Remove program code (JavaScript) that isn't used so the page loads fastererror
Tested:
- https://docs.developers.optimizely.com/

- The program code (JavaScript) takes a long time to runerror
Tested:
- https://docs.developers.optimizely.com/

- The browser has to work too hard to build the pageerror
Tested:
- https://docs.developers.optimizely.com/

- The page loads a very large amount of datawarning
Tested:
- https://docs.developers.optimizely.com/

- The page responds quickly to clicksok
Tested:
- https://docs.developers.optimizely.com/

- Content stays still while the page loadsok
Tested:
- https://docs.developers.optimizely.com/

- Nothing makes the content jump aroundok
Tested:
- https://docs.developers.optimizely.com/

- The page itself is fetched quicklyok
Tested:
- https://docs.developers.optimizely.com/

- The page is reasonably complexok
Tested:
- https://docs.developers.optimizely.com/

- Program code (JavaScript) isn't loaded twiceok
Tested:
- https://docs.developers.optimizely.com/

- forced-reflow-insightok
Tested:
- https://docs.developers.optimizely.com/

- The images are delivered efficientlyok
Tested:
- https://docs.developers.optimizely.com/

- lcp-breakdown-insightok
Tested:
- https://docs.developers.optimizely.com/

- No old-style program code is sent unnecessarilyok
Tested:
- https://docs.developers.optimizely.com/

- Code from other sites doesn't affect performance muchok
Tested:
- https://docs.developers.optimizely.com/

- The page displays well on mobileok
Tested:
- https://docs.developers.optimizely.com/

- The design code (CSS) is compressedok
Tested:
- https://docs.developers.optimizely.com/

- The program code (JavaScript) is compressedok
Tested:
- https://docs.developers.optimizely.com/

- The page loads no unused design code (CSS)ok
Tested:
- https://docs.developers.optimizely.com/

- user-timingsok
Tested:
- https://docs.developers.optimizely.com/

- No tasks lock up the page for longok
Tested:
- https://docs.developers.optimizely.com/

- non-composited-animationsok
Tested:
- https://docs.developers.optimizely.com/

- Images have a set size so the page doesn't jumpok
Tested:
- https://docs.developers.optimizely.com/

- Everything the page fetches from the networkok
Tested:
- https://docs.developers.optimizely.com/

- How long data takes to travel back and forth on the networkok
Tested:
- https://docs.developers.optimizely.com/

- Delay in the server before it respondsok
Tested:
- https://docs.developers.optimizely.com/

- Tasks the browser performs for the pageok
Tested:
- https://docs.developers.optimizely.com/

- Technical information about the pageok
Tested:
- https://docs.developers.optimizely.com/

- Measurements of the page's performanceok
Tested:
- https://docs.developers.optimizely.com/

- Small images of how the page loadsok
Tested:
- https://docs.developers.optimizely.com/

- Image of the page once it finished loadingok
Tested:
- https://docs.developers.optimizely.com/

- Overview of the page's program codeok
Tested:
- https://docs.developers.optimizely.com/

- Summary of what the page fetchesok
Tested:
- https://docs.developers.optimizely.com/

- Visitors aren't sent on unnecessarilyok
Tested:
- https://docs.developers.optimizely.com/

- The server responds quicklyok
Tested:
- https://docs.developers.optimizely.com/

- Content doesn't move suddenlyok
Tested:
- https://docs.developers.optimizely.com/

- inp-breakdown-insightok
- The browser finds the main image quicklyok