Calibre: Most-used fields

The table below gives information about most-used fields that you can import from Calibre. Other fields might also be available in Adverity.

The fields that you can fetch in Adverity are updated regularly to reflect updates to data source APIs.

API name	Adverity UI name	Description	Use in Adverity
asset_count	asset_count	The total number of assets loaded on the page during the performance test.	metric
consistently-interactive	consistently-interactive	A metric indicating when the page is consistently interactive and ready for user input.	metric
created_at	created_at	The timestamp indicating when the snapshot or data record was created.	dimension
css_body_size_in_bytes	css_body_size_in_bytes	The uncompressed size in bytes of CSS resources within the main document’s body.	metric
css_size_in_bytes	css_size_in_bytes	The total compressed size in bytes of all CSS resources loaded on the page.	metric
cumulative-layout-shift	cumulative-layout-shift	A Core Web Vital metric that quantifies the amount of unexpected layout shift of visual page content.	metric
date	date	The date associated with the performance data or snapshot.	dimension
first-contentful-paint	first-contentful-paint	A metric that measures the time from when the page starts loading to when any part of the page’s content is rendered on the screen.	metric
first-interactive	first-interactive	A metric indicating when the page becomes minimally interactive, allowing users to interact with elements.	dimension
first-meaningful-paint	first-meaningful-paint	A metric that measures when the primary content of a page is visible to the user.	dimension
firstRender	firstRender	The time it takes for the browser to render the very first pixel of content on the page.	metric
font_body_size_in_bytes	font_body_size_in_bytes	The uncompressed size in bytes of font resources within the main document’s body.	metric
font_size_in_bytes	font_size_in_bytes	The total compressed size in bytes of all font resources loaded on the page.	metric
html_body_size_in_bytes	html_body_size_in_bytes	The uncompressed size in bytes of the HTML document’s body.	metric
html_size_in_bytes	html_size_in_bytes	The total compressed size in bytes of the HTML document.	metric
image_body_size_in_bytes	image_body_size_in_bytes	The uncompressed size in bytes of image resources within the main document’s body.	metric
image_size_in_bytes	image_size_in_bytes	The total compressed size in bytes of all image resources loaded on the page.	metric
js-parse-compile	js-parse-compile	The time spent by the browser parsing and compiling JavaScript code on the page.	metric
js_body_size_in_bytes	js_body_size_in_bytes	The uncompressed size in bytes of JavaScript resources within the main document’s body.	metric
js_size_in_bytes	js_size_in_bytes	The total compressed size in bytes of all JavaScript resources loaded on the page.	metric
json_body_size_in_bytes	json_body_size_in_bytes	The uncompressed size in bytes of JSON resources within the main document’s body.	metric
json_size_in_bytes	json_size_in_bytes	The total compressed size in bytes of all JSON resources loaded on the page.	metric
largest_contentful_paint	largest_contentful_paint	A Core Web Vital metric that reports the render time of the largest image or text block visible within the viewport.	metric
lighthouse-accessibility-score	lighthouse-accessibility-score	The Lighthouse score for the accessibility of the page, indicating how well the page adheres to accessibility best practices.	metric
lighthouse-best-practices-score	lighthouse-best-practices-score	The Lighthouse score for best practices, assessing general web development best practices.	metric
lighthouse-performance-score	lighthouse-performance-score	The Lighthouse score for the overall performance of the page.	metric
lighthouse-pwa-score	lighthouse-pwa-score	The Lighthouse score for Progressive Web App (PWA) readiness, indicating how well the page meets PWA criteria.	metric
lighthouse-seo-score	lighthouse-seo-score	The Lighthouse score for Search Engine Optimization (SEO), assessing how well the page is optimized for search engine ranking.	metric
max-potential-fid	max-potential-fid	This metric represents the maximum potential First Input Delay (FID) that a user might experience. It quantifies the longest duration a web page’s main thread was blocked, which can prevent it from responding to user input. This value serves as an indicator of the page’s responsiveness during its loading phase and can predict significant delays in initial user interactions. Calibre offers ‘Total Blocking Time’ (TBT), a closely related metric that sums all long tasks that block the main thread, directly influencing potential input delays. [2]	metric
oncontentload	oncontentload	The time when the DOMContentLoaded event fired, indicating that the HTML document has been completely loaded and parsed, without waiting for stylesheets, images, and subframes to finish loading.	metric
onload	onload	The time when the load event fired, indicating that the entire page, including all dependent resources such as stylesheets and images, has finished loading.	dimension
page_body_size_in_bytes	page_body_size_in_bytes	The uncompressed size in bytes of all resources within the main document’s body.	metric
page_dns_timing	page_dns_timing	The duration in milliseconds spent on DNS lookup for the page’s main document.	metric
page_download_timing	page_download_timing	The duration in milliseconds spent downloading the page’s main document.	metric
page_id	page_id	A unique identifier for a specific page monitored by Calibre.	dimension
page_name	page_name	The human-readable name of the monitored page.	dimension
page_size_in_bytes	page_size_in_bytes	The total compressed size in bytes of all resources loaded for the page.	metric
page_ssl_timing	page_ssl_timing	The duration in milliseconds spent on the SSL/TLS handshake for the page’s main document.	metric
page_tcp_timing	page_tcp_timing	The duration in milliseconds spent on establishing the TCP connection for the page’s main document.	metric
profile	profile	The test profile or configuration used for the snapshot, which defines parameters like device, network, and location.	dimension
profile_status	profile_status	The current status of a performance profile or snapshot, indicating whether the performance measurement process was ‘completed’ successfully or encountered an ‘errored’ state.	dimension
site_id	site_id	A unique identifier for the site being monitored.	dimension
speed_index	speed_index	A Lighthouse metric that shows how quickly the contents of a page are visibly populated.	metric
status	status	The overall status of the snapshot, such as ‘scheduled’, ‘running’, ‘verifying’, ‘errored’, or ‘completed’.	dimension
testDuration	testDuration	The total duration in milliseconds that the performance test took to complete.	metric
third_party_count	third_party_count	The number of third-party requests made by the page.	metric
third_party_main_thread_duration	third_party_main_thread_duration	The total time in milliseconds that third-party scripts blocked the main thread.	metric
third_party_size_in_bytes	third_party_size_in_bytes	The total compressed size in bytes of all third-party resources loaded on the page.	metric
time-to-first-byte	time-to-first-byte	A metric that measures the time it takes for a user’s browser to receive the first byte of response from the web server.	metric
total-blocking-time	total-blocking-time	A Lighthouse metric that measures the total amount of time that a page is blocked from responding to user input.	metric
uuid	uuid	A universally unique identifier for the snapshot or a specific data point.	dimension
video_body_size_in_bytes	video_body_size_in_bytes	The uncompressed size in bytes of video resources within the main document’s body.	metric
video_size_in_bytes	video_size_in_bytes	The total compressed size in bytes of all video resources loaded on the page.	metric
visually_complete	visually_complete	The time in milliseconds when the visible portion of the page has fully rendered.	metric
visually_complete_85	visually_complete_85	The time in milliseconds when 85% of the visible portion of the page has fully rendered.	dimension